annexure-3 : revised “ volume 2(r1)”

Annexure-3 : Revised “ Volume-2(R1)”

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STANDARD BIDDING DOCUMENT

FOR

PROCUREMENT OF WORKS

Construction of Sewage Treatment Plants (STPs),

Pumping Stations, ETPs for Dairy Complexes,

Rehabilitation of existing STPs & Main Pumping

Stations for Abatement of Pollution in Buddha

Nallah, Ludhiana

including Operation & Maintenance for a period of

10 years (on DBOT basis) under AMRUT

at

Ludhiana, Punjab

(Value of the Project: Lump-Sum contract including 10 years O&M)

Volume -2 (Part -1) (R1)

SECTION-5

TECHNICAL CONDITIONS, SPECIFICATIONS & REQUIREMENTS

Standard Basic Specifications & General Requirement

February, 2020


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Article I. Table of Contents

ARTICLE I. TABLE OF CONTENTS ......................................................................................................... 2

SAMPLING PROTOCOL FOR STP PROCESS ......................................................................................... 58

DESIGN REQUIREMENT ............................................................................................................................. 74

THE TERTIARY TREATMENT PLANT SHALL CONFORM TO THE SPECIFICATIONS AS MENTIONED BELOW: ................................................................................................................................... 87

DISC FILTER ASSEMBLY WITH FILTER CLOTH: .................................................................................. 87

1. COARSE SCREENS ............................................................................................................................. 108

2. RAW SEWAGE SUMP AND PUMPS ................................................................................................ 109

3. INLET CHAMBER ................................................................................................................................. 109

4. FINE SCREENS ..................................................................................................................................... 109

5. GRIT CHAMBERS ................................................................................................................................. 109

6. ANY BIOLOGICAL UNIT ..................................................................................................................... 110

7. SLUDGE SUMP AND PUMP ............................................................................................................... 110

8. CHLORINATION TANK ........................................................................................................................ 110

9. CENTRIFUGE/ BELT FILTER PRESS .............................................................................................. 110

THE TERTIARY TREATMENT PLANT SHALL CONFORM TO THE SPECIFICATIONS AS MENTIONED BELOW: ................................................................................................................................. 123

DISC FILTER ASSEMBLY WITH FILTER CLOTH: ................................................................................ 123

1. COARSE SCREENS ............................................................................................................................. 145

2. RAW SEWAGE SUMP AND PUMPS ................................................................................................ 145

3. INLET CHAMBER ................................................................................................................................. 145

4. FINE SCREENS ..................................................................................................................................... 145

5. GRIT CHAMBERS ................................................................................................................................. 146

6. ANY BIOLOGICAL UNIT ..................................................................................................................... 146

7. SLUDGE SUMP AND PUMP ............................................................................................................... 146

8. TERTIARY TREATMENT AND CHLORINATION TANK ............................................................... 146

9. CENTRIFUGE/ BELT FILTER PRESS .............................................................................................. 146

I. COARSE SCREENS ............................................................................................................................. 182

II. RAW SEWAGE SUMP AND PUMPS ................................................................................................ 182

III. INLET CHAMBER ............................................................................................................................ 182

IV. FINE SCREENS ................................................................................................................................ 182

V. GRIT CHAMBERS ............................................................................................................................ 182

VI. ANOXIC REACTOR ......................................................................................................................... 183

VII. SLUDGE SUMP AND PUMP .......................................................................................................... 183

VIII. CHLORINATION TANK................................................................................................................... 183

IX. CENTRIFUGE/ BELT FILTER PRESS ......................................................................................... 183


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1. Abatement of Pollution in Buddha Nallah, Ludhiana

1.1. Introduction

Ludhiana is the largest city in the State of Punjab having populations of 1,618,879

persons as per census of year 2011. Total area of the city is 159.37 Sq. km. Projected

population of the town for year 2030 is 23.46 Lakh and 30.27 Lakh in 2045. The whole

city is presently covered with 100% sewerage and water supply facilities. The city is

divided into two parts by the Jalandhar-Delhi railway line passing through the city. The

sewerage system of the town on the North side of the railway line is covered under

Zone A and B whereas the town on the South side is covered under Zone C as detailed

below:-

Zone A: (Jamalpur) about 12% of the total area.

Zone B: (Bhattian) about 33% of the total area.

Zone C: (Balloke) about 55% of the total area.

In the Initial year of the current century, three Sewage Treatment Plants were installed

in the town under Sutlej Action Plan and further in the next decade more Sewage

Treatment Plants were added at Bhattian and Balloke as tabulated below:-

Table 1: Existing STPs and MPSs

S.No.

Location

of the

STP

Capacity

(in MLD) Technology

Year of

Commissioning

Present

Status

1 Zone A:

Jamalpur 48 UASB 2008

Defunct

2 Zone B:

Bhattian 111 UASB 2007 Functional

3 -Do- 50 SBR 2012 Functional

4 Zone C:

Balloke 152 UASB 2008 Functional

5 -Do- 105 SBR 2012 Functional

Total Waste Water Treatment Capacity available in the town is 466 MLD, whereas

domestic waste water generation is approx. 624 MLD.

1.2. Critical Issues of Waste Water collection and Treatment System in Ludhiana city:

i. Lack of adequate STP capacity for treating the entire quantum of waste water

generated in the city. As a result, the excess sewage is being dumped into the

Nallah through temporary disposal points.

ii. Mixing of industrial effluent in the domestic sewerage network is occurring at

several locations.


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iii. Ingress of domestic and industrial waste water into the storm water drains

flowing into Buddha Nallah.

iv. Some drains and tributaries of Buddha Nallah are discharging polluted waste

water in Buddha Nallah.

v. Waste water from two major dairy complexes located at Tajpur and Haibowal

is being discharged into city sewers and Buddha Nallah.

vi. Presently, Industrial effluent is reaching the existing STPs. This has resulted in

a critical situation as it has led to the STP capacity being overwhelmed due to

which the treated discharge of the existing STPs falls way short of permissible

standards.

vii. At some places due to choking of the main sewer line, sewage is diverted to

the Nallah though temporary disposal points.

1.3. For abatement of pollution in Buddha Nallah and resultantly, improving the quality of

water in river Sutlej, recipient of Buddha Nallah discharge, Govt. of Punjab is

implementing the project for augmentation and upgradation/ rehabilitation of

wastewater treatment facilities in Ludhiana City. The objective of this project is to

collect and treat entire domestic waste water to the required levels, so as to ensure that

only the treated water flows into Buddha Nallah.

1.4. Project Proposal

1.4.1. Zone-wise Domestic Waste Water Flow in Buddha Nallah

The flow in Buddha Nallah was measured from October 27th, 2019 to October 29th,

2019, when the industry operations were closed due to Diwali and Vishawkarma Day.

Measured Flows in Buddha Nallah are as under:-

Sr.

No.

Description Avg. Flow in Buddha Nallah at the entry into MC

Limit (MLD)

Discharge

For Different STP Zones (MLD)

Jamalpur Bhattian Balloke

1 Total

Discharge 11 133 204 287

Domestic Waste water within MC Limit 624

1.4.2. Existing Temporary Pumping Stations discharging into Buddha Nallah

S. No

Location Capacity (In MLD)

1 Transport Nagar 35

2 Shingar Cinema 28

3 Gaushala 30

4 Sunder Nagar 8

5 Tibba Road 12

6 Kundan Puri 5

7 Upkar Nagar 13


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8 Lifeline Hospital 23

9 Lord Mahavir Ayurveda Hospital 20

Total 195

1.4.3. Performance of existing STPs

a) Jamalpur (48 MLD UASB STP)

This plant is receiving very high volume of mixed waste water from residential and

industrial area (mainly textiles) and is not performing.

b) Bhattian (111 MLD UASB STP)

The STP is receiving mixed waste water from residential and industrial area (mainly

textiles) and is not performing upto the desired level on account of accumulation of

Sludge in the Reactors, Ponds and Sludge drying beds.

c) Bhattian (50 MLD SBR STP)

The STP is receiving mixed waste water from residential and industrial area (mainly

textiles) and is performing well and giving result near to desired levels. Pink colour is

observed at the discharge, of the treated sewage.

d) Balloke (152 MLD UASB STP)

The STP is receiving mixed waste water from residential area and dairy waste, due to

which it is not performing upto the desired levels on account of accumulation of

Sludge along with fodder particles in the Reactors, Ponds and Sludge drying beds.

e) Balloke (105 MLD SBR STP)

The STP is receiving mixed waste water from residential area and dairy waste, due to

which it is not performing upto the desired levels on account of accumulation of

sludge along with fodder particles, in aeration and selector zones. Due to which

number of Diffusers have been torn/chocked.

1.4.4. Project Objective/ Proposed improvements in first phase i.e. the present

contract:

a) To close 7 major pumping outlets into Buddha Nallah and construct new intermediate

pumping stations to divert the flow from these to the nearby STPs for treatment.

Sewage of two pumping stations i.e. Transport Nagar and Shingar Cinema will be

taken care of by the existing sewerage system after excess waste water starts

pumping through proposed IPS at Gaushala and Tibba Road.

b) Lay rising main connecting various proposed intermediate pumping stations to

Jamalpur STP and Balloke STP.

c) To rehabilitate 2 nos. of existing STPs based on UASB technology (111 MLD at

Bhattian and 152 MLD at Balloke) and one time repair of two nos. existing STPs

based on SBR technology (50 MLD at Bhattian & 105 at Balloke)

d) To rehabilitate the existing MPS at Bhattian and two MPS at Balloke.

e) To construct new STP for 225 MLD waste water at Jamalpur

f) To construct new STP of 60 MLD required capacity for waste water at Balloke


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g) To construct 2 ETPs to handle the Dairy Waste Water from washings of Dairy

Complexes at Tajpur (2.25 MLD) and Haibowal (3.75 MLD).

Note: - For diversion of flow from existing outlet referred at (a) above, bidder can give alternative proposal (details in para 2.0).

2. Scope of Work in Brief

2.1. Scope of Work:

The brief description of scope is as under but not limited to:-

a) Jamalpur Zone

i. Construction of IPS at Sunder Nagar.

Construction of pumping station of 8 MLD average capacity, capable to cater the

peak discharge of 18 MLD along with the required pumps, with suitable head, to

discharge into the shaft of rising main.

ii. Rising Main from Sunder Nagar IPS to Gaushala point

The DI-K9 rising main is to be laid and commissioned. This rising main should be

of the suitable size to cater the peak discharge from Sunder Nagar pumping

station. The velocity in pipe at peak flow should not be more than 1.5 mtr/sec.

iii. Construction of IPS at Gaushala

Construction of Pumping Station at Gaushala to cater the capacity of 30 MLD

average flow along with the required pumps, to cater the peak discharge of 67.5

MLD, with the suitable head, to discharge into the shaft of rising main.

iv. Rising Main from Gaushala IPS to Tibba Road IPS


of the suitable size to cater the peak discharge from both Sunder Nagar &

Gaushala pumping stations. The velocity in pipe at peak flow should not be more

than 1.5 mtr/sec.

v. Construction of IPS at Tibba Road

Construction of Pumping Station at Tibba Road to cater the capacity of 12 MLD

average flow along with the required pumps, to cater the peak discharge of 27

MLD, with the suitable head, to discharge into the rising main.

vi. Rising Main from Tibba Road IPS to proposed MPS at Jamalpur


of the suitable size to cater the peak discharge from all the three pumping stations

at Sunder Nagar, Gaushala and Tibba Road. The velocity in pipe at peak flow

should not be more than 1.5 mtr/sec.

vii. Construction of 225 MLD capacity STP & MPS

A new STP upto tertiary level of 225 MLD (Average flow) capacity is to be

constructed at Jamalpur site to handle the domestic flow mixed with 20% industrial

flow from textile and dyeing industries. A new MPS of 225 MLD average flow, is


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also to be constructed, along with the required pumps, to cater the peak discharge

of 450 MLD, with the suitable head, to discharge into the new STP/ETP.

viii. Construction of ETP and waste water collection system for Dairy Waste at

Tajpur Road

A new ETP is to be constructed at Dairy Complex on Tajpur Road to handle the

Dairy Waste i.e. cow dung and fodder waste, along with waste water generating

from washing of buffaloes and floors etc. The daily flow generated from this Dairy

Complex is about 2.25 MLD. Most of the flow from dairy is discharged during

morning hours and evening hours, resulting into a peak factor of approximately 5

during morning flows. The ETP is to be constructed for peak flow upto primary

treatment. After equalization tank, provided before secondary treatment, ETP shall

be designed for average flow of 2.25 MLD The treated water from the ETP shall be

discharged into Buddha Nallah, which is passing nearby. Conveyance network for

collecting dairy waste water from individual dairies upto ETP system is included in

the scope of work. The conveyance network is to be designed for peak flow.

b) Bhattian Zone

i. Rehabilitation Main Pumping Station at Bhattian.

Complete rehabilitation of common MPS catering to both the STPs i.e. 111 MLD

UASB & 50 MLD SBR, along with the required pumps, to cater the peak discharge

of 322 MLD, with suitable head, to discharge into the rising mains leading to STPs.

ii. One time repair of 50 MLD existing STP on SBR technology.

The existing 50 MLD STP commissioned in 2012 is performing near to the

designed efficiency. However, Refurbishment of STP, especially with respect to

the Electrical, Mechanical, Instrumentation and Chlorination System is proposed

so as to improve the efficiency of plant and ensure satisfactory working in the

future.

iii. Rehabilitation of existing 111 MLD STP based on UASB

The 111 MLD UASB plant commissioned in year 2007 consists of primary

treatment units, UASB reactors, polishing ponds and chlorination system. The

performance of plants is not upto the mark. Complete over hauling of the plant

especially Screens, Detroiters, Sludge Removal System, HDPE Down Pipes, PVC

Sheets, FRP Pipes/Boxes/Channels, Chlorination System, Gas Collection Dome,

Gas Flaring system, and removal of sludge from reactors, polishing ponds is

proposed. Sludge is to be disposed off at Dumping Station to be earmarked by

Municipal Corporation, Ludhiana. Repair and service of existing duel fuel engine +

generating sets is in scope of work. To improve efficiency of plant, provision of

surface aerators in existing final polishing units are proposed.

Any other repair/painting/modification as required for successful functioning of the

plant and preservation/ aesthetics of plant is also to be done.

iv. Arrangement for mechanical dewatering of sludge from existing 111 MLD

UASB Plant.


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In the existing system the sludge from the reactors is collected in a sump from

where it is pumped to the 72 nos. Sludge Drying Beds (SDB). It is proposed to set

up new mechanical sludge dewatering unit and required allied works.

v. Additional Chlorination Plant at Bhattian.

Additional New Chlorination Plant along with leak absorption system with capacity

of 40 kg per hour is to be provided. A New Chlorination Plant will have the

provision to supply chlorinated water to both the Existing STPs i.e. 111 MLD UASB

and 50 MLD SBR.

c) Balloke Zone

i. Construction of MPS at Kundan Puri


peak discharge of 12.5 MLD along with the required pumps, with suitable head, to

discharge into the existing sewer line after crossing the Budhha Nallah.

ii. Rising Main from Kundan Puri MPS to nearby intercepting sewer.


of the suitable size to cater the peak discharge from Kundan Puri pumping station

into nearby intercepting sewer across Buddha Nallah. The approximate length of

rising main shall be 100 mtr. The velocity in pipe at peak flow should not be more

than 1.50 mtr/sec.

iii. Construction of MPS at Upkar Nagar



discharge into the rising main.

iv. Rising Main from Upkar Nagar to point near Lord Mahavir Ayurveda Hospital

The DI-K9 rising main is to be laid and commissioned from Upkar Nagar to point

near Lord Mahavir Ayurveda Hospital. This rising main should be of the suitable

size to cater the peak discharge from the permanent pumping station at Upkar

Nagar. The velocity in pipe at peak flow should not be more than 1.50 mtr/sec.

v. Construction of IPS at Backside of Lord Mahavir Ayurveda Hospital

New pumping station of 43 MLD at Backside of Lord Mahavir Ayurveda Hospital is

to be constructed with 43 MLD average flow capacity along with the required

pumps, to cater the peak discharge of 96.75 MLD, with the suitable head, to

discharge into the common rising main coming from Upkar Nagar across Buddha

Nallah to transfer the flow to Balloke STP site. At this IPS 23 MLD sewage will be

received from the nearby passing 1200 mm dia sewer coming from lifeline Hospital

and 20 MLD sewage will be received from the storm sewer which is carrying

domestic sewer during dry weather flow. For diversion of flow, provision of

adjustable gates will be made in the storm sewer line which shall be lifted during

storm period.

vi. Rising Main from Backside Lord Mahavir Ayurveda Hospital to STP Balloke


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The DI-K9 rising main is to be laid and commissioned from Backside Lord Mahavir

Ayurveda Hospital to STP Balloke (In the new proposed chamber for receiving

sewage from this rising main and existing 90” as well as 60” sewer. This rising

main should be of the suitable size to cater the peak discharge from the pumping

stations at Upkar Nagar and Lord Mahavir Ayurveda Hospital. The velocity in this

pipe should not increase 1.5 mtr/sec at peak flow.

vii. Construction of New STP & MPS at Balloke

A new STP upto tertiary level of suitable capacity is to be constructed at Balloke

site to augment the capacity of existing SBR Plant. Presently, two STPs, one of

152 MLD based on UASB technology followed by polishing ponds and other of 105

MLD based on SBR Technology are existing at Balloke Site. It is proposed to

increase the total treatment capacity at this site from 257 MLD to 307 MLD. UASB

Plant is proposed to be rehabilitated and shall continue to handle 152 MLD

sewage. Part of 155 MLD sewage is proposed to be treated in existing SBR STP

and for remaining a new STP covered in the scope of the bid. The existing SBR

plant was planned for 105 MLD flow with parameters of raw sewage to be treated

in this plant given in the below table. However on the basis of testing of raw

sewage reaching the plant, the raw sewage parameters are increased as under:-

Sr.

No. Parameters Raw Sewage Unit

Previous

design basis

Proposed

design basis

1. Biochemical Oxygen

Demand (BOD5) 225 250 mg/l

2. Chemical Oxygen Demand

(COD) 500 500 mg/l

3. Total Suspended Solids

(TSS) 475 500 mg/l

It is estimated that the treatment capacity of existing SBR plant may reduce due to

increase in parameters values of raw sewage. A new STP upto tertiary level of 60

MLD average flow capacity is to be constructed at Balloke site.

A new MPS of suitable capacity is also to be constructed, along with the required

pumps, to cater the peak discharge with the suitable head, to discharge required

flow into the new STP. The interconnection/extension of incoming sewer lines into

the STP along with provision of required diversion chambers/gates is also included

in the scope.

viii. Construction of ETP for Dairy waste at Haibowal Village

A new ETP is to be constructed at Dairy Complex at Haibowal Village to handle

the Dairy Waste i.e. cow dung and fodder waste, along with waste water

generating after washing of buffaloes and floors etc. The daily flow generated from

this Dairy Complex is about 3.75 MLD. Most of the flow from dairy is discharged

during morning hours and evening hours, resulting into a peak factor of

approximately 5 during morning flows. The ETP is to be constructed for peak flow

upto primary treatment. After equalization tank, provided before secondary

treatment, ETP shall be design for average flow of 3.75 MLD The treated water


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from the ETP shall be discharged into Buddha Nallah, which is passing nearby.

Conveyance network for collecting dairy waste water from individual dairies upto

ETP system is included in the scope of work. The conveyance network is to be

designed for peak flow.

ix. One time repair of existing STP on SBR technology at Balloke

The existing STP commissioned in 2012 needs refurbishment especially with

respect to the Electrical, Mechanical, Instrumentation and Chlorination System to

improve the efficiency of plant and ensure satisfactory working to treat atleast 95

MLD (average flow) sewage.

x. Rehabilitation of Main Pumping Station at Balloke for SBR Plant.

Complete rehabilitation of MPS catering to 105 MLD SBR based STP, to cater the

capacity up to 105 MLD average flow, along with the required pumps, to cater the

peak discharge up to 210 MLD, with suitable head, to discharge into the rising

main leading to STP.

xi. Rehabilitation of Main Pumping Station at Balloke for UASB Plant.

Complete rehabilitation of MPS UASB Plant to cater the capacity of 152 MLD

average flow, along with the required pumps, to cater the peak discharge of 304

MLD, with the suitable head, to discharge into the rising mains leading to STP.

xii. Rehabilitation of existing 152 MLD STP based on UASB

The 152 MLD UASB plant commissioned in year 2008 consists of primary

treatment units, UASB reactors, polishing ponds and chlorination system. The

performance of plants is not upto the mark. Complete over hauling of the plant

especially Screens, Degritters, Sludge Removal System, HDPE Down Pipes, PVC

Sheets, FRP Pipes/Boxes/Channels, Chlorination System, Gas Collection Dome,

and removal of sludge from reactors and polishing pond is proposed. Sludge is to

be disposed off at Dumping Station to be earmarked by Municipal Corporation,

Ludhiana. Bidder is to service and repair the existing Flaring System. Repair and

service of existing duel fuel engine + generating sets is in scope of work. To

improve efficiency of plant, provision of surface aerators in existing final polishing

units are proposed.

Any other repair/painting/modification as required for successful functioning of the

plant and preservation/ aesthetics of plant is also to be done.

xiii. Arrangement for mechanical dewatering of sludge from existing 152 MLD

UASB Plant.

In the existing system the sludge from the reactors is collected in a sump from

where it is pumped to the 96 nos. Sludge Drying Beds (SDB). It is proposed to set

up new mechanical sludge dewatering unit and required allied works.

xiv. Additional chlorination plant at Balloke.

Additional new chlorination plant along with leak absorption system with a capacity

of 60 kg per hour is to be provided for additional chlorination of effluent from UASB

Plant.


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d) Others

i. The industries are laying a conveyance system for collection of Industrial waste

water and are in the process of setting up three common effluent treatment plants

to treat the industrial waste water. Waste water from some industries, might not

have been taken care by the industries. During execution of the project under

consideration, if any, additional conveyance system for industrial waste water

collection is to be laid, the same shall be in the scope of work in this bid however;

payment for such work shall be made additionally as per Punjab CSR Rates.

Note: - The above scope of work (defined in para 2.0) is indicative and minimum

requirements only. Bidder is to make own assessment of works to be done

to achieve the project objective to stope overflow into Budha Nallah from ‘7’

locations and treatment of waste water.

Alternative proposal

For diversion of flow from existing outlets referred at (a&c) of Sr.No.2 bidder

can give alternative proposal.

i. For transfer of waste water from existing outlets at Sunder Nagar, Gaushala, Tibba Road, Kundanpuri, Sunder Nagar, Upkar Nagar and Lord Mahavir Ayurveda Hospital, bidder is at liberty to give alternative proposal. The alternative proposal can be for transfer of flow of quantities mentioned above to any 3 of existing STP sites (Jamalpur, Bhattian and Balloke) by gravity flow or pumping or combination of gravity and pumping. The feasibility of alternative proposal shall be responsibility of bidder.

ii. In case of alternative proposal, for pumping mains DI K-9 pipe is to be used and for gravity lines RCC NP-3 sewer with HDPE lining is to be used.

iii. If alternative proposal given by bidder leads to change in the flow quantity of sewage to be treated in the new STPs, the bidder shall be required to construct the new STPs of revised capacities, keeping the total capacity equal to the indicative proposal of employer.

iv. In case of alternative proposal, bidder in his technical bid shall give complete details and feasibility of the proposal as well as daily power consumption for pumping of sewage diverted from these 7 outlets into the inlet chamber of STPs.

v. The bidder shall also workout the difference in power consumption for pumping in accordance to his proposal w.r.t. the employer’s proposal and give detail in technical bid.

vi. For financial evaluation of bids submitted with alternative proposal and bids submitted with employer’s proposal, Net Present Value of the power consumption difference between two proposals shall be added/subtracted to/from the financial bid (Capital cost + O&M cost + Net present value of guaranteed power) as the case may be in accordance to the following formula:

Difference in power consumption between alternative proposal and employer’s proposal = ‘B’ KVAH per day Energy charges = Rs .7.00 per KVAH


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Annual Energy charges = 7.00 x 365 x ‘B’ = Rs 2555 B Net present value factor = 8.4726

Net present value of difference in power consumption = 8.4726 x 2555 B = Rs.21648 B

3. Detailed Scope for Capital Works:

3.1. Construction of 225 MLD capacity STP at Jamalpur

STP Jamalpur is receiving waste water through three sewerage pipelines. Jamalpur

zone has textile and dyeing industries. Presently influent from the industry is getting

mixed with domestic waste water part of which is reaching the STP site and remaining

overflows into Buddha Nallah.

On account of higher volume and high percentage of Industrial influent the existing 48

MLD UASB based STP is not performing at all and is proposed to be abandoned.

The industries are setting up 90 MLD CETP and separate conveying system for

collection of Industrial Waste Water. The project is in advanced stage of

implementation and likely to be commissioned in near future. However, some scattered

industries will continue to discharge waste water into the sewerage system.

Taking in account Commissioning of the CETP’s, a new STP upto tertiary level of 225

MLD (Average flow) capacity is to be constructed at Jamalpur site to handle the

domestic flow mixed with upto 20% industrial flow from textile and dyeing industries.

The tertiary treated water shall be utilisable for industrial / Agriculture Purpose.

a) Design Basis for 225 MLD STP:

Daily Average Flow for New STP 225 MLD

Peak factor 2.0

Raw Influent Characteristics are indicated in the following Table:

S. No.

Parameters Value Unit

1 pH 6.5 -9.0

2 Biochemical Oxygen Demand (BOD5) 250 mg/l

3 Chemical Oxygen Demand (COD) 500 mg/l

4 Total Suspended Solids (TSS) 500 mg/l

5 Total Kjeldahl Nitrogen (TKN) 45 mg/l

6 Total Phosphorous (TP) 7 mg/l

7 Fecal Coliforms Approx. 1

x 107

MPN/100 ml

The Bidder shall carry out the tests of raw influent by themselves to ascertain the

raw influent quality for treatment process. For design purposes the lower parameters


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than the above mentioned parameter will not be allowed.

b) Treated Sewage Quality:

The Contractor shall design the process in such a way that the treated effluent quality

attains the following limits or even better:

Sr.

No.

Parameters Values Unit

1 pH 6.5 – 8.5

2 Biochemical Oxygen Demand(BOD5) <10 mg/l

3 Chemical Oxygen Demand (COD) ≤ 50 mg/l

4 Total Suspended Solids (TSS) ≤ 5 mg/l

5 Amonical Nitrogen as N < 5 mg/l

6 Total Nitrogen (TN) ≤ 10 mg/l

7 Total Phosphorous (TP) ≤ 1 mg/l

8 Fecal Coliforms ≤ 230 MPN/

100 ml

9 SAR (Sodium Absorption Ratio) ≤ 3.5

10 EC (Electrical Conductivity) ≤ 2000 Micro mhos / cm

11 RSC (Residual Sodium Carbonate) ≤ 2.5 mg/l

c) Detailed Scope of Work

The treatment plant is to be based on any suitable, sustainable and proven aerobic

technology including MBR & SBR with its variants. The technology offered should be

suitable for upgradation to achieve stringent effluent parameters in future. Accordingly,

the process design along with layout plan, hydraulics and P&I diagram indicating the

various units and their functions shall be submitted by the contractor and only after

approval of Engineer-in-Charge, the process shall be adopted by the contractor.

However, indicative process components are as under:

Sr. No.

Component Details

1

Primary Treatment

Inlet Chamber, (receiving water from

existing/proposed Main Pumping Station

at this site)

Four Working Step/ Matt type Mechanical Fine Screens and Two Manual Standby Fine Screens

Mechanical Grit Chambers with atleast 50% standby

Gates at the inlet and outlet of screens/ Grit Chambers


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Sr. No.

Component Details

2 Biological Treatment

This shall include Biological Reactors, Sludge Re-Circulation, Aeration, Settling, Excess Sludge Removal, process with nitrification, de-nitrification and biological phosphorous removal.

Other operational requirement like Automation (PLC) for Flow Control, Level Control, Oxygen Level Control etc,

3 Sludge Handling System

Sludge withdrawal system

Sludge sump

Sludge pump house

Stabilization of primary sludge

Mechanism for Polymer chemical/dosing.

Sludge Dewatering mechanism like Combined Mechanical Thickener cum Belt Press or Centrifuge + gravity sludge thickener

The required buildings for Sludge Dewatering Units.

Sludge storage platform

Disposal of de-watered sludge, if required, to site earmarked by employer.

Recirculation of filtrate

4 Tertiary Treatment

Includes Filtration Units (Fiber Disc / Sand Filtration)

System for Pumping, if required, to pump secondary Treated water to the filtration units.

Backwash System including cleaning pumps if required.

Control panel & Instruments

Gates & Auto Valves

Piping

Back wash Recovery system consisting of flash mixer, clarifier, sludge holding Tank, Pump House and Dewatering unit.

5 Disinfection system for

treated waste water after Tertiary Treatment

Chlorine mixing / contact tank

Tonner House

Leak Detection, Leak Absorption and Other Required Safety Systems

Chlorination Room for Chlorinators and Booster pumps

6 Operation Buildings

Blowers room

H.T Substation

Meter room

Master Control Centre, Programmable Logic Controller Centre

Toilet block for field staff


15

Sr. No.

Component Details

Store Room/Tool Room

Workshop

Any other required buildings

7 Process piping / drain

piping/ channels

Pipes and drains pipe/channel required for complete working of the process

8 Site Development

Roads and pavement

Sewerage system and storm water drainage system including rain water harvesting

Water supply for drinking and process requirements.

Beautification of open spaces within the STP Site by Plantation/grass/bushes.

9 Disposal of treated

effluent

Disposal of treated effluent into Buddha Nallah through RCC open channel or Pipes upto Buddha Nallah.

Secondary pumping station, if required, for disposal into Buddha Nallah.

10 Miscellaneous

Stairs, railing and platforms

Painting / white washing of all buildings and pipes

Lowering of ground water table during construction, if required

Arrangement for disposal of screenings / grit / other wastes to the site earmarked by employer

Fire-fighting arrangement

11 Mechanical Works List

Manually Operated Fine Bar Screens

Mechanically operated Step/ Matt type screens

Mechanical Detritus mechanisms

Turbo Air Blowers with VFD

Various Sludge Pumps, for example:- Return Activated Sludge Pumps Surplus sludge Pumps Gravity Thickener Feed Pumps Belt Press Feed Pumps Centrifuge Feed Pumps Any other required pumps

Air diffusers (fine/coarse)

Combined Thickener cum Belt Press Machines or Centrifuge + Gravity Sludge Thickener Mechanism

Decanters / Weirs

Pumps for Supernatant

Chemical Feed Pumps and Mixers / Agitator

Manual and Auto Valves / Gates


16

Sr. No.

Component Details

Chain Pulley Block, Mono Rail, Electric Hoists

Service Water Pumps

Chlorination System including Chlorinators, Pumps, Tonners and Safety Equipments

All items and mechanism of filtration system which includes Pumps, Blowers, etc.

Pumps, if required, for lifting Secondary and Tertiary treated water.

Any other item as per proposed technology.

12 Electrical Works

VCB Panel

Transformers

Generating Sets

Main Electrical Panels

Cabling

Earthing

Lighting System

Energy Meter

Other items as specified and required

13 Instrumentation, Control

& Automation

Flow meters

At inlet of treatment plant, outlet of treatment plant and bye-pass to treatment plant

CCTV Cameras

SCADA & PLC System

Automation of various units / operations

Online monitoring system for raw and treated water quality

14 Miscellaneous Laboratory Equipment

15

All the existing buildings/ Structures are to be rehabilitated. Rehabilitation of buildings/ structures means complete renovation, repair and painting.

Repair/rehabilitation of existing roads/path ways.

Plantation within STP areas as per requirement.

Repair and painting of existing streets light poles.

Providing and fixing of LED lights alongwith new cabling for the existing street light points.

Note:The existing administrative building and laboratory and other buildings may be used after rehabilitation and painting etc.

16

Existing FPUs/ SDBs shall be dismantled and site is to be used for accommodating new STP and MPS. The sludge from FPU and SDBs and demolition waste shall be disposed off at Dumping Station to be earmarked by Municipal Corporation.


17

Sr. No.

Component Details

17 Any other component required as per process

The above list is indicative only. The bidder, as per his proposed technology, shall

include all the relevant required civil, electrical, mechanical components,

instrumentation, automation and site development works to achieve the results as

defined in the scope of work and approved by the Engineer-in-Charge.

3.2. Raw Sewage Pumping Station at Jamalpur

Average Flow : 225 MLD

Peak Factor : 2.0

Peak Design Flow : 450 MLD (18750 cum/hr)

Sr. No.

Component Details

i Raw Sewage Pumping Station

Receiving Chamber with gates

Gates at upstream of coarse screens

Gates at downstream of coarse screens

Four working ‘J’ Type Screens (each ‘J’ Type Screen shall be provided at upstream of mechanical coarse screen)

Four working mechanical Coarse Screens and Two Stand-By Manual Coarse Screens.

Raw sewage sump

Raw Sewage Pumps

Ultra-Sonic Type Flow meter on common rising main

Level transmitters in raw sewage sump

PLC/ RTU connected to SCADA of STP with provision for external links.

Mixer pumps/ submersible mixers in sewage sump to avoid settling of suspended matter.

Lifting arrangement for pumps.

Providing transformer and generating set.

Any other component required for efficient and reliable working of pumping station.

Bidder may choose a proposal for pumping station out of the following:

A single Pumping Station, for combined flow from sewer line and rising main from Tibba Road IPS.

Two Pumping station, one for flow from sewer line and other for flow from rising main.

3.3. Construction of new ETP at Tajpura for Dairy Waste

A new ETP is to be constructed at Dairy Complex on Tajpur Road to handle the Dairy

Waste i.e. cow dung and fodder waste, along with waste water generating after washing


18

of buffaloes and floors etc. The average flow generated from this Dairy Complex is about

2.25 MLD. Most of the flow from dairy is discharged during morning hours and evening

hours, resulting into a peak factor of approximately 5 during morning flows. The ETP is

to be constructed for peak flow upto primary treatment. After equalization tank, provided

before secondary treatment, ETP shall be design for average flow of 2.25 MLD. The

treated water from the ETP shall be discharged into Buddha Nallah, which is passing

nearby.

The scope of work includes RCC channels for collection and conveyance of dairy waste

water from individual diaries to the proposed ETP. The channels shall be covered with

slabs having provision of openings/removable slabs to maintain/ clean the channels. The

pumping station required for transferring the collected waste water from drains to ETP is

included in the scope of work. The land available for Tajpur ETP is in two parcels.

Specification of conveyance channels:-

Material of construction : RCC grade M-30 or higher

Design flow : Peak flow

Self-cleaning velocity : > 0.6 Mtr/second

Provision of catch pits at suitable location to retain solids

Covering slab for drains to be kept 0.20 Mtr above the ground/ road level.

Opening to be provided by lift able slabs/ manhole covers.

Note: In case drains, in addition to area proposed in the drawings are required the same

will be in the scope of contract on extra payment as per Punjab, Schedule of Rates

as applicable at the time of execution.

a. Design Basis:

Daily Average Flow for New ETP 2.25 MLD

Peak factor 5.0

b. Raw Influent Quality:

An abstract of Raw Dairy Waste Water characteristics is indicated in the following Table:

Sr. No.


1 pH 6.5 to 9

2 Biochemical Oxygen Demand (BOD5)

2000 mg/l





The Bidder shall carry out the tests of waste water by themselves to ascertain the

quality for treatment process. For design purposes the lower parameters than the


19

above mentioned parameter will not be allowed.

c. Treated Effluent Quality:

The Contractor shall design the process in such a way that the treated effluent quality

attains the following limits or better:

Sr. No. Parameters Valu

es Unit

1 pH 6.5 – 8.5

2 Biochemical Oxygen Demand (BOD5) < 10 mg/l



5 Fecal Coliforms ≤ 230 MPN/100ml

6 Ammonical Nitrogen as N < 5 mg/l




10 EC (Electrical Conductivity) ≤ 2000 Micro mhos /

cm


d. Detailed Scope of Work for ETP

The treatment plant is to be based on suitable, sustainable and proven technology.

Accordingly, the process design along with layout plan, hydraulics and P&I diagram

indicating the various units and their functions shall be submitted by the contractor and

only after approval of Engineer-in-Charge, the process shall be adopted by the

contractor. However, indicative process components are as under:

Sr. No.

Component Details

1 Primary Treatment

Inlet Chamber (receiving water from proposed main pumping Station at this site)

One working Mechanical Step Type Fine Screen and 1 manual standby stand-by screen

One Mechanical Perforated Screen

One Manual Screen wire mesh (Mechanical Step Type Screen shall be followed by Mechanical Perforated Screen and Manual Mesh Screen)

Mechanical Grit Chambers with 100% standby.

Gates at the inlet and outlet of Fine screens

Flash Mixer with Agitator

Primary Clariflocculator with sludge collection


20

Sr. No.

Component Details

mechanism, scum removal arrangement

Equalization Tank with Pumps, Blowers and Grid for Mixing Arrangement

2 Anaerobic Treatment (Optional)

Anaerobic Reactors with Gas Collection mechanism and gas flaring system.


This shall include Biological Reactors, Sludge Re-Circulation, Aeration, Settling, and Excess Sludge Removal, process with in-built nitrification, de-nitrification and biological phosphorous removal.

Other operational requirement like Automation (PLC) for Flow Control, Level Control, Oxygen Level Control etc.

4 Tertiary Treatment Fiber Disc Filtration Units

Flash Mixer

Flocculator with Agitator Mechanism

Civil (RCC) Tank to house the Fiber Disc filter

Disc filter assembly with Filter Cloth

Drive Assembly

Backwash System which includes Suction Cleaning Pumps for back wash


Gates & Auto Valves

Piping

5 Disinfection system for treated waste water


Tonner House

Chlorination Room for Chlorinator, Booster pumps & space for Safety mechanism

6 Sludge Handling System


Primary Sludge sump

Primary Sludge pump houses

Secondary Sludge sump

Secondary Sludge pump houses

Mechanism for Polymer chemical/dosing


Sludge Dewatering mechanism building like Centrifuge or Screw Press for primary as well as secondary sludge




7 Operation Buildings Blowers room

H.T Substations

Meter rooms



21

Sr. No.

Component Details

Administrative blocks/ Operation building including toilets

Toilet blocks for field staff on both sites.

Store Room/Tool Room

Any other required building

8 Process piping / drain piping/ channels


9 Site Development Roads and pavement

Boundary walls

Sewerage system and storm water drainage system.


Beautification of open spaces within the ETP Sites by Plantation/grass/bushes.

10 Disposal of treated effluent

Disposal into Buddha Nallah through RCC Pipe / channel

11 Miscellaneous Stairs, railing and platforms



Arrangement for disposal of screenings / grit /other wastes to the site earmarked by employer.


12 Mechanical Works List Mechanical Step/ Matt type Fine Bar Screen

Mechanical perforated screen

Manual Mesh Screen

Mechanical Detritus mechanisms

Air Blowers with VFD

Various Sludge Pumps, for example:- Return Activated Sludge Pumps Surplus sludge Pumps Centrifuge / Screw Press Feed Pumps Any other required Pumps


Decanters / Weirs

Pumps for Supernatant disposal



Chain Pulley Blocks, Mono Rails, Electric Hoists

Service Water Pumps

Chlorination System including Chlorinators, Pumps and Tonners.


13 Electrical Works VCB Panel


22

Sr. No.

Component Details

Transformers

Generating Sets


Cabling

Earthing

Street Lighting

Energy Meter


14 Instrumentation, Control & Automation

Flow meters

At inlet of treatment plant, outlet of treatment plant and bye-pass to treatment plant

CCTV Cameras

SCADA & PLC System

Automation of various units/operations



Note : (1) Since the ETP is to be installed in two separate parcels some of

the provision shall be required at both the locations. This is

included in the scope of work.

(2) For testing of waste water samples (treated/untreated) laboratory

of nearby STP at Jamalpur shall be used.


include all the relevant required civil, electrical, mechanical, instrumentation,

automation and site development works to achieve the results as defined in the scope

of work and approved by the Engineer-in-Charge.

e. Raw Influent Pumping Station

Sr. No.

Component Details

i Raw Influent Pumping Station

Receiving Chamber with gate



One working J Type Mesh Screens (J Type Screen shall be provided at upstream of mechanical coarse screen)

One working mechanical Coarse Screens and One Stand-By Manual Coarse Screen.

Raw sewage sump

Raw Sewage Pumps

Ultra-Sonic Type Flow meter on rising main

Level transmitter in raw sewage sump

PLC/ RTU connected to SCADA of ETP

Transformer and generating set

Mixer pumps/ Submersible mixers

Lifting arrangement


23

Any other component required.

3.4. Rehabilitation Main Pumping Station at Bhattian

Complete rehabilitation of common MPS catering to both the STPs i.e. 111 MLD UASB

& 50 MLD SBR, to cater the capacity of 161 MLD average flow, along with the required

pumps, to cater the peak discharge of 322 MLD, with suitable head, to discharge into the

rising mains leading to STPs. Indicative scope of work is as under:-

S.No. Components Details

1 Mechanically operated medium screens suitable for 2750mm wide x 3000mm deep channel with total depth of approximately 8 m from channel bottom to top platform

Numbers 2

Clear Opening 20 mm

Construction material SS 304

2 Manual medium screen Number 1

Clear Opening 40 mm


3 Submersible pump of capacity 1500 Cum per hour at 16 Mtr head

5 Nos

4 Providing and Installing conveyor belt

Length 7m

5 Automation of Pump operation All Raw Sewage pumps shall be automatically controlled, through Ultrasonic Level Transmitter, RTU/PLC. This automation shall be synchronised with existing PLC of 50 MLD SBR Bhattian. The PLC to have provision for external linkage.

6 Any other component required.

Note:- All mechanical, Electrical and Civil Items shall be taken for service and repairs, to

deliver designed discharge.

The above list is indicative only, and not limited to, above. The bidder, shall include all

the relevant required civil, electrical, mechanical, instrumentation, service and repair so

as to make the pumping station work efficiently with reliability.

3.5. Refurbishment of 50 MLD SBR based STP at Bhattian

The existing STP is in the operation, since 2012. Refurbishment of STP with respect to

electrical, mechanical, instrumentation and chlorination system is required. Complete

refurbishment to ensure that the plant performs to the desired level of treatment is

required. A broad assessment of items to be checked and serviced/replaced/repaired is

as under:-


24

Sr. No. Component Details

I. Inlet Flow Meter Servicing & Repair

II. Fine Screens (Mechanical & Manual) Servicing & Repair

III. Auto Inlet Gates to Reactors (4 No.) Servicing & Repair

IV. Auto Valves for Air Pipes, Sludge Pipes

Servicing & Repair

V. Air Blowers (6) Servicing & Repair

VFD of 2 Nos. to be replaced

VI. RAS/SAS Pumps Servicing & Repair

VII. Fine Air Diffusers Replacement as per condition

assessment

VIII. Decanters (4 No.) Servicing & Repair

IX. DO meters (4 No.) Replacement

X. Level Sensors Servicing & Repair

XI. Centrifuges Servicing & Repair

XII. Chlorination System and Leak Absorption System

Servicing & Repair

XIII. Sludge Sump Grid and Blowers Servicing & Repair

XIV. Existing Chlorination system in 50 MLD STP

Providing Leak Detection, Leak Absorption and Other Required Safety Systems

XV. After cooler in main line from blower to reactors Air Pipe Line

New provision

XVI. Any other component/ work required for satisfactory working of the plant.

The above list is indicative only, and not limited to, above. The bidder, shall include all

the relevant required civil, electrical, mechanical, instrumentation, automation and site

development works, so as to make the plant operative to desired efficiency level for the

flow to be treated in this plant.

Repairs and painting of all civil structures, piping etc. shall be a part of the scope.

3.5.1 After refurbishment, the treated effluent quality shall be as under:-

Sr.

No.


1 pH 6.5 – 8.5





25

Sr.

No.






101 ml




3.6. Rehabilitation of existing 111 MLD STP based on UASB

The 111 MLD UASB plant commissioned in year 2007 consists of primary treatment

units, UASB reactors, polishing ponds and chlorination system. The performance of

plants is not upto the mark. Complete over hauling of the plant especially Screens,

Degritters, Sludge Removal System, HDPE Down Pipes, PVC Sheets, FRP

Pipes/Boxes/Channels, Chlorination System, Gas Collection Dome, Gas flaring system

and removal of sludge from reactors & polishing ponds is proposed. Repair and service

of existing duel fuel engine + generating sets is in scope of work. Any other

repair/painting/modification as required is also to be done.

The identified indicative scope of work is as per table below:


1 Aluminium Proportional Weir with

markings One number 6 mm thick

2

10 x 10 m Detritus Tank scrapping

arrangement, Deflectors, weirs, Grit

washing and Grit conveying (Submerged

parts SS 304)

4

3

Construction of additional 10 x 10 m

Detritus tanks with scrapping

arrangement, Deflectors, weirs, Grit

washing and Grit conveying

2

4

Coating of existing FRP components:

External side with surface glass layer

using Isothlic resin on Gutter, Baffle

plate, gas hood and feed box etc.

Approx. 715 sqm

5 Supply and fabrication of FRP sheet

items (8mm thick) Approx. 650 sqm

6 Rigid PVC sheet 6mm Approx. 2763 sqm

7 PVC sheet angles 6mm thick Approx. 8068 sqm

8 50mm dia PVC pipe nylon impregnated pipe

2304 Mtrs


26


9 HDPE pipes, 10kg/cm2 110mm o/d= 378m

160mm o/d=400m

10 HDPE Couplers 160mm dia 32 Nos

11

PP Ball valves 20mm NB=72 Pcs.

75mm NB= 144 Pcs.

160mm NB= 5 Pcs.

12 Peet valves 40mm= 90 Pcs.

13 Replacement of MS Gas holder 1 Number

14 MS Chequered Plate As per site requirement

15 Structural Steel Work As per site requirement

16 Repair/ replacement of railing As per site requirement

17 Fixed type surface aerator including civil structures and all required accessories. (submerged part shall be of SS-304)

Minimum 48 Nos, 5 HP

18

Epoxy coating of concrete surfaces. Inside of UASB reactors, chlorine contact tank, De-gritters screens and other units/ channels etc.

19 Any other component required for satisfactory working of the plant

The Bidder shall carry out the assessment to ascertain the repair/replacement

required so as to make the plant operational with the desired efficiency.

The Removal of Sludge from Reactors, Polishing Ponds and any other Unit

(except sludge drying beds) is included in the scope of work the sludge so

removed is to be disposed of and the location earmarked by the Municipal

Corporation, Ludhiana.

Treated Effluent Parameters after rehabilitation of UASB STP

Sr.

No.


1. Biochemical Oxygen Demand(BOD5) <30 mg/l

2. Total Suspended Solids (TSS) ≤ 50 mg/l

3. Fecal Coliforms ≤ 230 MPN/

100 ml

3.6.1 Utilisation of Gas Generated from 111 MLD UASB plant

The present Gas utilisation consists of Gas flaring system and Dual Fuel Engines (Diesel + Gas). Bidder is to repair/replace the existing Flaring System. The gas generated from the

plant shall be property of the bidder. Suitable credit for the gas shall be considered by

the bidder in the price bid. The duel fuel Engine + generating set shall be repaired/

serviced.


27

3.6.2 Arrangement for Mechanical Dewatering of Sludge generated from existing 111

MLD UASB plant at Bhattian

Presently, the sludge from 9 UASB Reactors is collected in sludge slumps near the

reactors. From sludge slumps it is pumped to existing sludge drying beds in the same

premises. To save on the manpower required for maintaining the sludge drying beds; it

is proposed to set up an arrangement for mechanical dewatering of sludge withdrawn

from UASB reactors. The indicative scope of work is as under:-

Sr. No.

Component Details

i New Sludge

Handling Unit


Sludge sump

Sludge pump houses

Mechanism for Polymer/ chemical dosing

Sludge Dewatering mechanism including building like Combined Mechanical Thickener cum Belt Press or Centrifuge + gravity sludge thickener



Arrangement for disposal of de-watered sludge (land for disposal of dewatered sludge to be earmarked by Employer.

Any other component required

3.6.3 Additional Transformer and Generating Set for 111 MLD UASB Plant Surface

Aerator + Mechanical Dewatering system etc.

Additional new transformer and new generating set of sufficient capacity to operate

surface aerator to be provided in the final polishing units and all the equipment/ pumps

for mechanical dewatering of sludge generated from existing 111 MLD UASB plant at

Bhattian and other mechanisms like screens, de-gritters/ pre-aerators.

3.6.4 Additional Chlorination Plant at Bhattian

Additional New Chlorination Plant along with leak absorption system with a capacity of

40 kg per hour is to be provided. A New Chlorination Plant will have the provision to

supply chlorinated water to both the Existing STPs i.e. 111 MLD UASB and 50 MLD

SBR.

3.7. Construction of new 60 MLD STP at Balloke

A new STP upto tertiary level of 60 MLD (Average Flow) capacity is to be constructed at

Balloke:

Presently, inflow of sewage to Balloke STP is through existing three sewer lines (60

inch, 90 inch, 96 inch diameter sewers). To stop mixing of Dairy Waste with the

domestic sewage, an ETP is being set up at a separate site in Haibowal Village.

However, to further ensure that no Dairy Waste water flows to the existing 105 MLD

SBR plants and new proposed 60 MLD plant, it is proposed to make suitable


28

amendments/additions in the sewerage pipeline system so that the sewage from 96

inch sewer flows into UASB plant only (for indicative proposal refer drawing).

a) Design Basis for proposed plant:

Daily Average Flow for New STP 60 MLD

Peak factor 2.0

b) Raw Sewage Quality:

An abstract of Raw Sewage Characteristics is indicated in the following Table:

Sr.

No. Parameters Unit

1 pH 6.5 to 9

2 Biochemical Oxygen Demand

(BOD5) 250 mg/l





7 Fecal Coliforms 1 x 10

7 MPN/100 ml

The Bidder shall carry out the tests of raw sewage to ascertain the raw sewage

quality for treatment process. For design purposes the lower parameters than the


c) Treated Sewage Quality:

The Contractor shall design the process in such a way that the 155 MLD: (New STP +

Existing SBR based STP) treated effluent quality attains the following limits or even

better.

Sr. No.


1 pH 6.5 – 8.5






29

Sr. No.








d) Detailed Scope of Work

The treatment plant is to be based on any suitable, sustainable and proven aerobic

technology including MBR & SBR with its variants. The technology offered should be

suitable for upgradation to achieve stringent effluent parameters in future. Accordingly,

the process design along with layout plan, hydraulics and P&I diagram indicating the

various units and their functions shall be submitted by the contractor and only after

approval of Engineer-in-Charge, the process shall be adopted by the contractor.

However, indicative process components are as under:

Sr.

No.

Component Details

1

Primary Treatment

Inlet Chamber, (receiving water from

existing/proposed Main Pumping Station at

this site)

Two Working Step/ Matt type Mechanical Fine

Screens and One Manual Standby Fine

Screen

Mechanical Grit Chamber with atleast 50%

standby

Gates at the inlet and outlet of Fine screens &

inlet of Grit chamber


This shall include Biological Reactors, Sludge

Re-Circulation, Aeration, Settling, Excess

Sludge Removal, process with nitrification, de-

nitrification and biological phosphorous

removal. Other operational requirement like

Automation (PLC) for Flow Control, Level

Control, Oxygen Level Control etc.

3 Sludge Handling

System


Sludge sump

Sludge pump house

Mechanism for Polymer chemical/dosing.


Sludge Dewatering mechanism like Combined


30

Sr.

No.

Component Details

Mechanical Thickener cum Belt Press or

Centrifuge + gravity sludge thickener

The required buildings for Sludge Dewatering

Units.


Disposal of de-watered sludge, if required, to

site earmarked by employer.


4

Disinfection system for

treated waste water

after Biological

Treatment


Tonner House

Leak Detection, Leak Absorption and Other

Required Safety Systems

Chlorination Room for Chlorinator, Booster

pumps


Blowers room

H.T Substation

Meter room


Any other required buildings

6 Process piping / drain

piping/ channels

Pipes and drains pipe/channel required for

complete working of the process

7 Site Development

Roads and pavement

Sewerage system and storm water drainage system including rain water harvesting

Water supply for drinking and process requirements. Beautification of open spaces within the STP

Site by Plantation/grass/bushes.


effluent

Disposal into Buddha Nallah through existing

twin RCC open channel or through

independent Pipes / channels upto Buddha

Nallah.

Assessment of feasibility and carrying capacity

of existing twin channel and modification/

strengthening, if required.

Secondary pumping station, if required, for

disposal into Buddha Nallah.

9 Miscellaneous


Painting / white washing of all buildings and

pipes

Lowering of ground water table during


31

Sr.

No.

Component Details

construction, if required

Arrangement for disposal of screenings / grit /

other wastes to the site earmarked by

employer.


10 Mechanical Works List

Manually Operated Fine Bar Screens

Mechanically operated Step/ Matt type

screens

Mechanical Detritus Mechanism

Turbo Air Blowers with VFD

Various Sludge Pumps, for example:-

Return Activated Sludge Pumps

Surplus sludge Pumps

Gravity Thickener Feed Pumps

Belt Press Feed Pumps/ Centrifuge Feed

Pumps

Any other pump required


Combined Thickener cum Belt Press

Machines or Centrifuge + Gravity Sludge

Thickener Mechanism

Decanters / Weirs




Chain Pulley Blocks, Mono Rails, Electric

Hoists

Service Water Pumps

Chlorination System including Chlorinators,

Pumps and Tonners.


11 Electrical Works

VCB Panel

Transformers

Generating Sets


Cabling

Earthing

Lighting System

Energy Meter


12 Instrumentation,

Control & Automation

Flow meters - At inlet of treatment plant, outlet of treatment plant and bye-pass to treatment plant

CCTV Cameras


32

Sr.

No.

Component Details

SCADA & PLC System


Online monitoring system for raw and treated

water quality



The above list is indicative only. The bidder, as per his proposed, technology, shall include

all the relevant required civil, electrical, mechanical components, instrumentation,

automation and site development works as defined in the scope of work and approved by

the Engineer-in-Charge.

3.7.1. Construction of Raw Sewage Pumping Station for new STP at Balloke

Average Flow : 60 MLD

Peak Factor : 2.0

Peak Design Flow : To be worked out as per above

3.7.2. Raw Sewage Conveyance System

Raw sewage for this pumping station is to be received from difference sources 60 inch

incoming sewer from city area, rising main line from new proposed intermediate

pumping station and Surplus flow if any from 90 inch incoming sewer after feeding the

existing SBR STP. The sewage received from above referred sources is to be collected

in a sump from where the required quantity of sewage shall be transferred to this

pumping station. Excess quantity if any, is to be transferred to inlet sump of existing

MPS feeding 152 MLD existing UASB plant.

For indicative details incoming raw sewage refer drawing.

Sr. No.

Component Details

i Raw Sewage Pumping Station

Distribution chamber with gates




Two working J Type Mesh Screens (each J Type Screen shall be provided at upstream of mechanical coarse screen)

Two working mechanical Coarse Screens and one standby manual Coarse screen.

Raw Sewage Pumps

Ultra-Sonic Type Flow meter on rising main


PLC/ RTU connected to SCADA of STP

Mixer pump sets/ Submersible mixers

Electric hoist

Sewage pipe line and gates for distribution of


33

flow from 3 existing sewer lines in to existing and proposed STPs


3.8. Construction of new ETP at Haibowal for Dairy Waste

A new ETP is to be constructed at Dairy Complex at Haibwal village to handle the Dairy

Waste i.e. cow dung and fodder waste, along with waste water generating after washing

of buffaloes and floors etc. The average flow generated from this Dairy Complex is about

3.75 MLD. Most of the flow from dairy is discharged during morning hours and evening

hours, resulting into a peak factor of approximately 5 during morning flows. The ETP is

to be constructed for peak flow upto primary treatment. After equalization tank, provided

before secondary treatment, ETP shall be design for average flow of 3.75 MLD. The

treated water from the ETP shall be discharged into Buddha Nallah, which is passing

nearby.

The scope of work includes RCC channels for collection and conveyance of dairy waste

water from individual diaries to the proposed ETP. The channels shall be covered with

slabs having provision of openings/removable slabs to maintain/ clean the channels. The

pumping station required for transferring the collected waste water from drains to ETP is

included in the scope of work.

Specification of conveyance channels:-

Material of construction : RCC grade M-30 or higher

Design flow : Peak flow

Self cleaning velocity : > 0.6 Mtr/second

Provision of catch pits at suitable location to retain solids

Covering slab for drains to be kept 0.20 Mtr above the ground/ road level.

Opening to be provided by lift able slabs/ manhole covers.

Note: In case drains, in addition to area proposed in the drawings are required the same

will be in the scope of contract on extra payment as per Punjab, schedule of rates

as applicable at the time of execution.

a) Design Basis:

Daily Average Flow for New ETP (MLD)

3.75

Peak factor 5.0 for primary treatment

b) Raw Influent Quality:

An abstract of Raw Dairy Waste Characteristics is indicated in the following Table:

Sr. No.


1 pH 6.5 to 9

2 Biochemical Oxygen Demand (BOD5)

2000 mg/l


34

Sr. No.






The Bidder shall carry out the sampling tests of raw Influent by themselves to

ascertain the raw influent quality for treatment process. The Employer will not be

responsible for the above and no relaxation will be given to the guarantee conditions

of desired treated effluent quality. For design purposes the lower parameters than the


c) Treated Effluent Quality:

The Contractor shall design the process in such a way that the: treated effluent quality attains the following limits or even better

Sr. No.


1 pH 6.5 – 8.5










cm 11 RSC (Residual Sodium Carbonate) ≤ 2.5 mg/l

d) Detailed Scope of Work for ETP

The treatment plant is to be based on suitable, sustainable and proven technology.

Accordingly, the process design along with layout plan, hydraulics and P&I diagram

indicating the various units and their functions shall be submitted by the contractor and

only after approval of Engineer-in-Charge, the process shall be adopted by the

contractor. However, following guidelines / components may be followed by the

contractor are as under:


35


1

Primary Treatment

Inlet Chamber (receiving water from proposed main pumping Station at this site)

1 Working Mechanical Step Type Fine Screen + 1 manual standby screen

One Mechanical Perforated Screen

One Manual Screen wire mesh (Mechanical Step/ Matt Type Screen shall be followed by Mechanical Perforated Screen and Manual Mesh Screen)

Mechanical Grit Chambers with 100% standby

Gates at the inlet and outlet of Fine screens, at inlet of grit chamber

Flash Mixer with Agitator

Primary Clariflocculator with Mechanism for sludge collection and scum removal

Equalization Tank with Pumps, Blowers and Grid for Mixing Arrangement

2 Anaerobic Treatment

(Optional)

UASB Reactors with Gas Collection mechanism and gas flaring system

3

Biological Treatment

This shall include Biological Reactors, Sludge Re-Circulation, Aeration, Settling, Excess Sludge Removal, process with nitrification, de-nitrification and biological phosphorous removal.

Other operational requirement like Automation (PLC) for Flow Control, Level Control, Oxygen Level Control etc.

4 Tertiary Treatment

Includes Fiber Disc Filtration Units

Flash Mixer

Flocculator with Agitator Mechanism

Civil (RCC) Tank to house the Fiber Disc filter

Disc filter assembly with Filter Cloth

Drive Assembly

Backwash System which includes Suction Cleaning Pumps for back wash


Gates & Auto Valves

Piping

5 Disinfection system for waste water from Reactors / settling


Tonner House

Chlorination Room for Chlorinator,


36


units Booster pumps & space for Safety mechanism

6 Sludge Handling

System


Primary Sludge sump

Primary Sludge pump houses

Secondary Sludge sump

Secondary Sludge pump houses



Sludge Dewatering mechanism building like Centrifuge or Belt Press





Blowers room

H.T Substation

Meter room


Administrative block including toilets

Toilet block for field staff

Store room / tool room

Any other building required

8 Process piping / drain piping/ channels


9 Site Development

Roads and pavement

Sewerage system and storm water system.


Beautification of open spaces within the STP Site by Plantation/grass/bushes.


effluent

Disposal into Buddha Nallah through RCC Pipe / channel

11 Miscellaneous




Arrangement for disposal of screenings / grit / other wastes to the site earmarked by employer.


37



12 Mechanical Works

List

Mechanically Operated Step Type Fine Bar Screens

Mechanically operated perforated screens

Manual Mesh Screen

Mechanical Detritus Mechanism

Air Blowers with VFD

Various Sludge Pumps, for example:- Return Activated Sludge

Pumps Surplus sludge Pumps Centrifuge / Screw Press

Feed Pumps Any other pump required


Decanters / Weirs




Chain Pulley Blocks, Mono Rails, Electric Hoists

Service Water Pumps

Chlorination System including Chlorinators, Pumps and Tonners.


13 Electrical Works

VCB Panel

Transformers

Generating Sets


Cabling

Earthing

Lighting System

Energy Meter


14 Instrumentation,

Control & Automation

Flow meters - At inlet of treatment plant, outlet of treatment plant and bye-pass to treatment plant

CCTV Cameras

SCADA & PLC System






38


Note: For testing of waste water samples (treated/untreated) laboratory of nearby STP at Balloke shall be used.


include all the relevant civil, electrical, mechanical, instrumentation, automation and site

development works as defined in the scope of work and approved by the Engineer-in-

Charge.

All units upto primary treatment (Primary clarifloculator) shall be designed for peak flow.

All units after Equalisation Tank shall be designed for Average flow. Equalisation Tank is

to be located after primary units and before secondary units.

e) Raw Influent Pumping Station at ETP Premise at Haibowal

Sr. No.

Component Details

i Raw Influent Pumping Station




One working J Type Mesh Screens (each J Type Screen shall be provided at upstream of mechanical coarse screen)

One working mechanical Coarse Screen and One manual coarse screen.

Raw sewage sump

Raw sewage pumps


PLC/ RTU connected to SCADA of STP

Transformer and generating set

Mixer pumps/ Submersible mixers

Lifting arrangement

Any other component required as per process

3.9. Refurbishment of Existing 105 MLD MPS & STP Balloke

The existing STP is in operation since 2012. Refurbishment of MPS & STP with respect

to electrical, mechanical, instrumentation and chlorination system is required. to ensure

that the plant performs to the desired level of treatment as defined above. All

mechanical, Electrical and Civil Items shall be taken for service and repairs, to deliver

optimum discharge flow.

All Raw Sewage pumps shall be automatically controlled, through Ultrasonic Level

Transmitter. This automation shall be synchronised with existing PLC of existing SBR

based STP.

A broad assessment of items to be checked and serviced/replaced/repaired is as under:

Sr. No.

Component Details

I. Two Mechanical coarse screens (20mm opening) for deep channel prior to wet well

Replacement


39

Sr. No.

Component Details

II. One Manual Coarse Screen Servicing & Repair

III. Three new Horizontal Centrifugal Non-Clog Raw Sewage Pumps (Discharge = 1450 cum per hour, head = 20 m)

Replacement

IV. Two submersible mixers Repair/ Replacement

V. Belt Conveyors System of fine screens Replacement

VI. Fine Screens (Mechanical & Manual) Servicing & Repair

VII. Auto Inlet Gates to Reactors (6 No.) Servicing & Repair

VIII. Auto Valves for Air Pipes, Sludge Pipes Servicing & Repair

IX. Air Blowers (15 No.) Servicing & Repair

X. RAS/SAS Pumps Servicing & Repair

XI. Fine Air Diffusers Replacement as per condition

assessment

XII. Decanters (6 No.) Servicing & Repair

XIII. DO meters (6 No.) Replacement

XIV. Level Sensors Servicing & Repair

XV. Centrifuges (4 No.) Replacement 1 No.

Servicing & Repair 3 No.

XVI. Chlorination System and Leak Absorption System

Servicing & Repair

XVII. Sludge Sump Grid and Blowers Servicing & Repair

XVIII. After cooler in main line from blower to reactors air pipe line

New provision

XIX. Any other component/ work required for satisfactory working of the plant

The above list is indicative only, and not limited to, above. The bidder, shall include all the

relevant civil, electrical, mechanical, instrumentation, automation and site development

works, so as to make the plant operative to desired efficiency level for the flow to be

treated in this plant as accessed by the Bidder.

3.9.1 Treated Sewage Quality after refurbishment of existing SBR STP:

Sr.

No.


1 pH 6.5 – 8.5





40





100ml




3.10. Rehabilitation Main Pumping Station at Balloke for UASB Plant

Complete rehabilitation of MPS to cater the capacity of 152 MLD average flow, along

with the required pumps, to cater the peak discharge of 304 MLD, with the suitable head,

to discharge into the rising main. The indicative scope of work is as under:-

S. No.

Components Details

1. Mechanically operated medium screens suitable for 2750mm wide x 3000mm deep channel with total distance of approximately 8 m from channel bottom to top platform

Numbers 2

Clear opening 20mm


2. Manual medium screen Number 1

Clear opening 40 mm


3. Providing and Installing conveyor belt

Length as per site approximately 7 m

4. Raw Sewage Pumps 6 nos., CI casing, SS 316 impellers.

Capacity 2760 m3/hr at 17.3 m head with 270 HP 1000 RPM motor

5. Automation of Pump running All Raw Sewage pumps shall be automatically controlled through Ultrasonic Level Transmitter, RTU/PLC. This automation shall be synchronised.

6. Sluice valve 8 Nos

7. Non return valve 8 Nos

8. Pipes 700 mm dia As per site

9. CI Gates 8 Nos

10. Submersible Mixers As per requirement

11. Aluminium gate 4 Nos

12. Dewatering pumps ( 5 BHP) 2 Nos

13. Synchronising panel for existing two Diesel Generating Sets

1 No.

14. Auto transformer switches for eight pumps

8 Nos

15. Service and repair of all equipments As per requirement


41

16. Any other component required.

Note:- All mechanical, Electrical and Civil Items shall be taken for service and repairs, to

deliver designed discharge flow.

The above list is indicative only, and not limited to, above. The bidder shall include all

the relevant civil, electrical, mechanical, instrumentation, service and repair so as to

make the pumping station work efficiently with reliability.

3.11. Rehabilitation of existing 152 MLD STP based on UASB

The 152 MLD UASB plant commissioned in year 2008 consists of primary treatment

units, UASB reactors, polishing ponds and chlorination system. The performance of plant

is not upto the mark. Complete over hauling of the plant especially Screens, Degritters,

Sludge Removal System, HDPE Down Pipes, PVC Sheets, FRP Pipes/Boxes/Channels,

Chlorination System, Gas Collection Dome, Gas utilization system and removal of

sludge from reactors, polishing ponds and sludge drying beds is proposed. Any other

repair/painting/modification as required is also to be done.

The identified indicative scope of work is as per Table.

The Bidder shall carry out the assessment to ascertain the repair/replacement

required so as to make the plant operational with the desired efficiency.

The Removal of Sludge from Reactors, Polishing Ponds and any Other Unit is

included in the scope of work. The sludge so removed is to be disposed off at the

location earmarked by the Municipal Corporation, Ludhiana:

Sr. No.

Component Details

1 Aluminium Proportional Weir with markings

One number 6 mm thick

2

10 x 10 m Detritus Tank scrapping arrangement, Deflectors, weirs, Grit washing and Grit conveying submerged parts SS 304

4

3

Construction of additional 10 x 10 m Detritus tank with scrapping arrangement, Deflectors, weirs, Grit washing and Grit conveying

2

4 CI sluice valve for grit chamber drain 300 NB

5

Coating of existing FRP components: External side with surface glass layer using Isophthalic resin on Gutter, Baffle plate, gas hood and feed box etc.

Approx. 4390 sqm

6 Supply and fabrication of FRP sheet items (8mm thick)

Approx. 1000 sqm

7 Rigid PVC sheet 6mm Approx. 7365 sqm

8 PVC sheet angles 6mm thick Approx. 29599 sqm

9 50 mm dia PVC pipe nylon impregnated pipe

3072 m

10 HDPE pipes, 10kg/cm2 110mm o/d= 505m

180mm o/d=100m

11 180 mm PVC coupler 43 Nos

12 PP Ball valves 20mm NB=96 Pcs.

75mm NB= 192 Pcs. 160mm NB= 6 Pcs.


42

13 GI Peet valves with puddle pipe 40mm= 240 Pcs.

14 Replacement of MS Gas holder 1 Number

15 MS Chequered Plate As per site requirement

16 Structural Steel Work As per site requirement

17 Repair/ replacement of railing As per site requirement

18

Fixed type surface aerator including civil structures and all required accessories. (submerged part shall be of SS-304)

62 Nos

19 Any other component required for satisfactory working of the plant

3.11.1. Utilisation of Gas Generated from 152 MLD UASB plant

The present Gas utilisation consists of Gas flaring system and Dual Fuel Engines (Diesel + Gas).

Bidder is to repair/replace the existing Flaring System. The gas generated from the

plant shall be property of the bidder. Suitable credit for the gas shall be considered

by the bidder in the price bid. The duel fuel Engine + generating set shall be

repaired/ serviced.

3.11.2. Arrangement for Mechanical Dewatering of Sludge generated from existing

152 MLD UASB plant at Balloke

Presently, the sludge from 12 UASB Reactors is being collected in sludge slump

near the reactors. From sludge slump it is pumped to existing sludge drying beds in

the same premises. To save the land occupied by sludge drying beds and

manpower required for maintaining the sludge drying beds; it is proposed to set up

an arrangement for mechanical dewatering of sludge withdrawn from UASB

reactors. The indicative scope of work is as under:-

Sr. No.

Component Details

i New Sludge

Handling Unit


Sludge sump

Sludge pump house

Mechanism for Polymer/ chemical dosing

Sludge Dewatering mechanism including building like Combined Mechanical Thickener cum Belt Press or Centrifuge + gravity sludge thickener


Arrangement for disposal of de-watered sludge (land for disposal of dewatered sludge to be earmarked by Employer.


The bidder shall carry out assessment to ascertain the quantity and quality of sludge to

be handled and condition of the existing sludge handling systems.

3.11.3. Additional Transformer and Generating Set for 152 MLD UASB Plant Surface

Aerator + Mechanical Dewatering system etc.

Additional new transformer and new generating set of sufficient capacity to operate

surface aerator to be provided in the final polishing units and all the equipment/ pumps


43

for mechanical dewatering of sludge generated from existing 152 MLD UASB plant at

Balloke and other mechanisms like screens, de-gritters/ pre-aerators etc.

3.11.4. Additional Chlorination Plant at Balloke

Additional New Chlorination Plant along with leak absorption system with a capacity of

60 kg per hour is to be provided. A New Chlorination Plant will have the provision to

supply chlorinated water to both the Existing STPs i.e. 152 MLD UASB and 105 MLD

SBR.

3.11.5. Treated Effluent Parameters after rehabilitation of UASB STP

The treated effluent quality after refurbishment of STP is to be as under:-

Sr.

No.


4. Biochemical Oxygen Demand(BOD5) <30 mg/l

5. Total Suspended Solids (TSS) ≤ 50 mg/l

6. Fecal Coliforms ≤ 230 MPN/

101 ml

3.12. Three No. IPS and Rising main in Jamalpur zone

I. Construction of IPS at Sunder Nagar.

Presently waste water at this location is being directly discharged into Buddha Nallah

with the help of pumps which lift water from 36 inch diameter sewer. It is proposed to

transfer 8 MLD waste water from this location to Jamalpur STP by constructing a

permanent intermediate pumping station. Waste water in excess of this quantity, shall

continue to flow in the sewerage system.

Design Basis:

Daily Average Flow for IPS 8 MLD

Peak factor 2.25

Peak flow 18 MLD

Approx. Sewer Depth 3.5 to 4 Mtr.

Flow collection arrangement

Construction of manhole on existing sewer.

Suitable size pipe from manhole to receiving chamber of IPS.

Providing CI gate in the inlet chamber.

For details refer drawing.

II. Construction of IPS at Gaushala

Construction of Pumping Station at Gaushala to cater the capacity of 30 MLD average

flow along with the required pumps, to cater the peak discharge of 67.5 MLD, with the

suitable head, to discharge into the rising main leading to Jamalpur STP.

The sewage is to be diverted from two sources, (i) from existing trunk sewer and (ii)

drain from Transport Nagar. The collected sewage is to be pumped into the proposed


44

shaft for discharging the flow into STP Jamalpur. Required arrangement of gates for

diversion of flow is included in the scope.

Design Basis:


Peak factor 2.25

Peak flow 67.5 MLD





Weir with gates in the existing drain, for interception.

Channel from drain (upstream of weir) to receiving chamber.

Gates in the channel/receiving chamber to control flow in different scenarios.


III. Construction of IPS at Tibba Road

Construction of Pumping Station at Tibba Road to cater the capacity of 12 MLD

average flow along with the required pumps, to cater the peak discharge of 27 MLD,

with the suitable head, to discharge into the rising main leading to Jamalpur STP.

Design Basis:


Peak factor 2.25

Peak flow 27 MLD



The incoming sewer at temporary pumping station (Tibba Road) is to be diverted

to proposed new pumping station receiving chamber by laying suitable size pipe.

Gates in the receiving chamber to control flow in different scenarios.

Dismantling of existing temporary pumping station.


IV. Rising main from Sunder Nagar to STP Jamalpur

Sr. No.

Section/ component of rising main Design peak flow

1 From Sundar Nagar pumping station to elevated shaft no.1.

18 MLD

2 From shaft no.1 to shaft no.2 near Gaushala. 18 MLD

3 From Gaushala pumping station to shaft no.2. 67.5 MLD

4 Shaft no.2 to shaft no.3 near Tibba Road pumping station.

85.5 MLD

5 From Tibba Road pumping station to shaft no.3. 27 MLD

6 From shaft no.3 to collecting tank of main pumping station at STP Jamalpur.

112.5 MLD


45

DI K-9 pipe material is proposed for rising main.

The velocity in pipe at peak flow should not be more than 1.5 mtr/sec.

Elevated RCC shafts of required height to be built.

Air vents to be provided at suitable locations.

Note :-

The rising main is to be laid on the available route along with Buddha Nallah. However, in some stretches, where clear way is not available for laying rising main on the side of existing road, the rising main has to be laid over suitable pillar arrangement inside Buddha Nallah.

Crossing of Budha Nallah at various locations for laying rising mains

may be involved.


3.13. Three No. IPS and Rising main in Balloke

I. Construction of IPS at Kundan Puri



discharge into the existing sewer line after crossing the Budhha Nallah.

Design Basis:


Peak factor 2.5

Peak flow 12.5 MLD

Approx. Sewer Depth 3.0 to 3.5 Mtr.





II. Construction of MPS at Dusshera Ground- Upkar Nagar



discharge into the rising main into shaft No. 4.

The sewage flow from existing storm sewer is to be diverted to the proposed IPS by

installing adjustable gate on the storm sewer.

Design Basis:


Peak factor 2.25

Peak flow 29.25 MLD

Approx. storm Sewer Depth 2.5 to 3m


Construction of manhole / chamber on existing storm sewer

Providing adjustable gate in the chamber to divert flow

Suitable size pipe from manhole/ chamber to receiving chamber of IPS.


46


III. Construction of IPS at Backside of Lord Mahavir Ayurveda Hospital

New pumping station of 43 MLD at Backside of Lord Mahavir Ayurveda Hospital is to

be constructed with 43 MLD average flow capacity along with the required pumps, to

cater the peak discharge of 96.75 MLD, with the suitable head, to discharge into the

common rising main coming from Upkar Nagar across Buddha Nallah to transfer the

flow to Balloke STP site.

23 MLD sewage will be diverted from the 1200 mm dia sewer near life line Hospital.

20 MLD sewage will be diverted from the storm sewer which is carrying domestic

sewer.

Design Basis:


Peak factor 2.25

Peak flow 96.75 MLD

Approx. storm Sewer Depth Life Line sewer- 3.5 to 4 m Storm Sewer- 2.5 to 3 m


Construction of manhole / chamber on sewer near Life Line Hospital.

Providing suitable size pipe for transfer of sewage from existing manhole to

proposed IPS.

Providing chamber on existing Storm sewer near Lord Mahavir Hospital.

Crossing of Budha Nallah at different locations for laying of rising main if

required is in the scope of bidder.

Providing adjustable gate in the storm sewer chamber.

Providing pipe line to divert dry weather sewage flow from storm sewer.

Suitable size pipe from manhole/ chamber to receiving chamber of IPS.


IV. Rising main from Kundanpuri IPS to nearby sewer

Sr. No. Section/ component of rising main Design peak flow

1. From IPS Kundan Puri to Existing sewer. 12.5 MLD

2. From Upkar Nagar pumping station to elevated shaft no.4.

29.25 MLD

3. From shaft no.4 to shaft no.5 near Lord Mahavir Hospital.

29.25 MLD

4. From Lord Mahavir Hospital Pumping station to shaft no.5.

96.75 MLD

5. Shaft no.5 to Balloke STP 126 MLD

DI K-9 pipe material is proposed for rising main.

The velocity in pipe at peak flow should not be more than1.5 mtr/sec.


47

Elevated RCC shafts of required height to be built.

Air vents to be provided at suitable locations.

Note:-

The rising main is to be laid on the available route along with Buddha Nallah.

However, in some stretch, where clear way is not available for laying rising

main on the side of existing road, the rising main has to be laid over suitable

pillar arrangement inside Buddha Nallah.

Crossing of Budha Nallah by rising main at various locations may be involved.


3.14. General specifications for IPS

Sr. No.

Component Details

i. Civil Works Receiving chamber

Screen chamber

Wet well

MCC Room

ii Screens Gates at upstream of coarse screens

One working J Type Screen to be provided at upstream of mechanical coarse screens.


One working mechanical Coarse Screen and One manual coarse screen for peak flow upto 1250 m3/hour

For peak flow more than 1250 m3/hour two mechanical screens with one manual screen standby each of capacity half of the peak flow.

Clear opening of screen 20 mm

iii Wet Well RCC wet well with at least 5 minutes HRT for peak flow

iv Submersible Sewage Pumps

Number of pumps to be provided to cater peak flow, with 50% standby at peak flow.

v HT works Transformer and allied works as per required capacity.

vi DG Set Sufficient to operate pumps for average flow, screens and plant lighting etc.

vii Rising Main Rising main of DI-K9 Pipe to discharge point, as per proposed indicated scope of work and drawings.

Ultra-Sonic Type Flow meter on rising main of each IPS.

viii Instrumentation Level transmitter in raw sewage sump PLC/ RTU shall be connected and synchronized to master SCADA & PLC of STP concerned.


48

Sr. No.

Component Details

ix Operational building

MCC & PLC Room

Security room with toilet block

Operator room

x Gates and weirs Interception gates and weirs to be provided for complete flow control under different scenarios as per scheme.

xi Site development Boundary wall with gate

Road

Lighting

Plantation

Service water supply

Notes:- Applicable to IPS & MPS to be constructed under this bid.

1. The velocity in rising main at peak flow should not be more than 1.5 mtr/sec.

2. 100 mm free fall shall be provided at the inlet pipe of receiving chamber.

3. 100 mm free fall shall be provided at the downstream of coarse screens and

upstream of wet well.

3.15. Contract Limits: a) IPS & Rising Main:- The contract limit starts from the existing sewer lines or storm

line from where the waste water is to be diverted to the proposed IPS. This includes

construction of diversion weirs, wherever required and construction of diversion

chamber/manholes. The scope includes construction of columns/trusses/bridges for

crossing of Buddha Nallah or other drains as per site requirement. The scope of work

for IPS and rising main is upto final discharge point of rising main as below:-

IPS in Jamalpur Zone (Sunder Nagar, Gaushala & Tibba Road) and rising main upto STP Jamalpur

Inlet chamber of Proposed MPS at Jamalpur

IPS in Balloke Zone (Kundan Puri) Manhole of nearby existing sewer after crossing Buddha Nallah

IPS in Balloke Zone (Upkar Nagar & Backside of Lord Mahavir) and rising main upto STP Balloke

Inlet chamber of Proposed MPS at Balloke

b) MPS & STP at Jamalpur Site:-

Limit starts from inlet chamber of MPS and is upto disposal of treated water into

Buddha Nallah.

Dewatered sludge collection and disposal.

Disposal of screenings and grit

c) ETP for Dairy Complex at Tajpur:-

Construction of conveyance system including chambers for connection by

individual dairy owners.


49

Disposal of treated waste water into Buddha Nallah.



d) Arrangement for mechanical dewatering of sludge from existing 111 MLD UASB

Plant at Bhattian:-

Limits start at sludge withdrawal system from Reactors.

The recirculation of filtrate to existing MPS.

Dewatered sludge collection and disposal

e) Additional Chlorination Plant at Bhattian:-

Arrangement for transfer of treated water for use as Booster Water.

Arrangement for mixing of chlorine water solution to treated water of 50 MLD

SBR Plant and 111 MLD UASB Plant in the ratio required as per site conditions.

f) Construction of suitable capacity new STP & MPS at Balloke

Limits start at arrangement to divert waste water from existing 60 inch

diameter sewer and rising main from proposed IPS and 90 inch diameter sewer

to the proposed distribution chamber.

Disposal of treated effluent into the Buddha Nallah.



g) Arrangement for mechanical dewatering of sludge from existing 152 MLD UASB

Plant at Balloke:-

Limits start at sludge withdrawal system from Reactors.

The recirculation of filtrate to existing MPS.


h) Additional Chlorination Plant at Balloke:-

Arrangement for transfer of treated water for use as Booster Water.

Arrangement for mixing of chlorine water solution to treated water of 152 MLD

UASB Plant.

i) ETP for Dairy Complex at Haibowal:-

Construction of conveyance system including chambers for connection by

individual dairy owners.

Disposal of treated waste water into Buddha Nallah.



j) Water supply pipe line for drinking and general use i.e. toilet use and for process units

for STP shall be augmented/rehabilitated/provided new by the bidder (this includes

installation of new tube well, if required).

k) For operation of all the plants (IPS, MPS, ETP & SPS) Department will supply

electricity at HT Meter unit. Further works are in the scope of contractor.


50

l) Energy meter before MEP

The bidder shall have to provide sub-energy meters of suitable capacity for recording

the power consumption of STPs & ETPs.

3.16. Miscellaneous

The scope of work described under this paragraph is applicable to the entire works

covered in this Bid.

Bidders are advised to inspect the site and acquire knowledge about available site,

ground water table, type of soil, site accessibility, other site conditions, study and

analysis of existing related infrastructure of pumping stations, treatment plants, pipelines

etc. before tendering.

a) Additional work

i. In case of inlet parameters of sewage are continuously higher than the contract

value and to achieve desire treated effluent parameters, additions/ modifications are

to be done in the treatment plant, the same shall be done by the contractor after

approval from the employer.

ii. In case volume of water to be treated at Jamalpur STP site, new proposed STP at

Balloke is more than the agreed contract volume, additions/ modifications are to be

done in the treatment plant, the same shall be done by the contractor after approval

from the employer.

Note: For additional such works contractor shall be paid as per the quoted rates

for similar works, or the market rates for items for which rates are not

available in the contract mutually agreed by the contractor and employer.

b) Design

i. The bidder may get checked the soil bearing capacity, sub soil water level/ spring

level of the STP areas before submitting the bid. The successful bidder/contractor

shall get the bearing capacity of the plant area tested (in the presence of Engineer-

in-Charge or his authorized representatives) and design shall be based on the

tested bearing capacity. The maximum safe net bearing capacity for which the

structure are to be designed shall not be more than 8.6 ton per sqm. The

department may also get the bearing capacity tested if required at its own cost. In

case the results of bearing capacity test done by the contractor and done by the

Department are in variance, design value of bearing capacity shall be decided by

the Engineer-in-Chief, keeping in view the test results of bearing capacity reports got

done by the contractor and Engineer-in-Charge. Any financial claim on account of

difference in bearing capacity shall not be entertained. It is again reiterated that the

Contractor shall be responsible for soundness, safety and stability for the structures.

Bearing capacity of soil has to be calculated considering worst spring level.

ii. Ground survey of the sites for IPS, MPS, STP & Pumping Mains including existing

infrastructure set up is to be done by contractor.

iii. Preparation of Process Design, Hydraulic Design, Structural Design.

iv. Preparation of Electrical, Mechanical, Instrumentation and Automation Design.

v. Detailed Engineering & Working Drawings.

vi. Supply of equipment drawings, Technical Specifications / Catalogues.


51

vii. Manufacturer’s manual for Operation & Maintenance of the equipment supplied.

c) Design Submission

i. Service Improvement Plan (SIP) shall be submitted by the agency within 30 days of

award of work. SIP will be based on site survey, availability of routes, assessment of

flows, raw sewage characteristics etc. to achieve project objectives as per bid

ii. The agency shall submit, Master Design List and submit Layout Plan,

Hydraulic Flow Diagram and P&I Diagram along with related design

calculations within 30 days of approval of SIP (Service Improvement Plan).

The first set of working drawings/structural drawings along with related

design calculations shall be submitted within 30 days of approval regarding

Layout Plan, Hydraulic Flow Diagram and P&I Diagram. The remaining

working drawings/structural drawings and design will be submitted by the

firm to Engineer-in-Charge within three months of approval of Layout Plan,

Hydraulic Flow Diagram and P&I Drawing. Engineer-in-Charge shall approve

the design and drawings as per schedule of work submitted by firm and

agreed by Engineer-in-Charge.

iii. Design shall be approved by Engineer-in-Charge. If Engineer- in- Charge feels can

get the design/drawing checked from reputed Engineering College. The fee for

checking will be borne by the contractor.

iv. If changes in the submitted design/drawings are required, Engineer-in-Charge may

either himself do so prior to approval or may request the contractor to resubmit the

design/drawings after making the required amendments.

v. The designs shall take care of contract provisions, site requirements, CPHEEO

manual and various BIS Codes.

vi. In case, the design requirements are not specified in the bid document, CPHEEO

manual, BIS Code, the design shall be based on other standard literature and good

practices.

vii. The Contractor shall submit complete detailed design calculations of each of the

components such as substructure and superstructure together with general

arrangement drawings, construction drawings and explanatory sketches as required

by the Department.

viii. Separate calculations for substructures or superstructures submitted independent of

each other shall be deemed to be incomplete and will not be accepted by the

Department.

ix. Submissions of detailed design calculations and Good for Construction drawings

shall include the following as a minimum:

Detailed Design Calculations:

Pen Drive containing electronic files relevant to the structure’s modelling,

analysis and design calculations (Microsoft Excel, Staad Pro, etc.). Files

submitted shall be in editable format.

Print copy (5 Copies) of the contents as submitted in the Pen Drive.

d) Construction

i. Lowering of ground water table, if any, at site to take care of seepage from Buddha

Nallah or other drains during construction.

ii. Hydraulic testing of all water retraining systems.


52

iii. RCC access platform, walkway, staircase, all of minimum 1.2 mtr. width hand

railings 1.0 mtr. height shall be provided as a necessary item to all the units.

iv. Construction of bifurcation system for utilization of treated waste water towards

irrigation / industrial use, as per site feasibility.

v. Construction of outfall structure and protection of drain.

vi. Design and construction of suitable thrust block to support various rising mains.

vii. Make suitable provisions in design and construction to take care of surge

pressure/water hammering effects in the rising mains.

viii. During the entire construction, the operation of existing IPS at various locations,

MPS at Jamalpur, Bhattian & Balloke and STP at Bhattian and Balloke shall be kept

in working condition. However, if any closure is required by the contractor for

carrying out the construction work the contractor will submit detailed closure plan

and methodology for approval of Engineer-in-Charge. Only after such approval the

closure shall be allowed.

ix. All units shall be connected through RCC walkway.

e) Commercial

i. Repair and painting of all existing civil structures.

ii. Epoxy painting on the inner surface of all waste water retaining structures of existing

and proposed STPs/ ETPs.

iii. Disposal of sludge is in this scope of work. Sludge sale/disposal is the responsibility

of the contractor. It shall also be the responsibility of contractor to remove the sludge

from STP area, in case accumulation is more than the capacity of sludge storage

capacity platform. Contractor shall dispose of excess sludge in a manner and place

as decided by the Engineer-in-Charge, which shall not cause any nuisance or

obstruction to general public. Proceeds from sale of sludge if any belongs to the

contractor. Suitable credit from sale of sludge shall be considered by bidder

while submitting bid.

iv. Power factor to be maintained as per the requirements of PSPCL (Punjab State

Power Corporation Limited).

v. During the stabilization period and maintenance period Electricity Charges / Diesel

Charges (if any) will be borne by the department. All other consumable material and

required staff for Operation & Maintenance will be provided by bidder. If the plant is

not stabilized within 3 months electricity / diesel charges shall be borne by the

contractor.

vi. During Operation and maintenance period electricity charges for electric energy

supplied through PSPCL grid and Gen-set shall be borne by the department to the

extent of average guaranteed energy consumption worked out for the actual flow

quantity on the basis of guaranteed power consumption quoted by the agency for

full flow and actual average daily sewage treated in the plant for the electric bill

cycle, as per following steps:

Average daily Sewage treated as

percentage of

design flow of

STP

Maximum energy consumption

allowed as percentage of quoted

guaranteed power for design flow of

STP

<40% 60%


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50% 70%

60% 80%

70% 90%

>70% 100%

Note:- For actual average flows in between the steps defined above; allowed energy consumption shall be worked out by linear proportion between two steps on daily basis.

vii. If the actual energy consumption during the energy consumption bill cycle period is

more than allowed energy consumption as referred above, then the excess energy

consumption shall be borne by the contractor. The excess energy consumption shall

be charged at the per unit rate worked out from the bill raised by PSPCL. Diesel

required shall be arranged by the contractor. Department will reimburse the payment

to contractor on production of bill and other relevant record (i.e. upto the Guaranteed

Power Consumption).

viii. Power as well as water required during construction shall be arranged by the

contractor.

f) Vehicles/ Office during construction period

i. The contractor shall provide ‘3’ vehicles DZIRE/ ETIOS or EQUIVALENT of Model

2017 or later for the construction period till commissioning of entire project, for use

by Authorities (Department/PMU/PMC/PDMC). The salary of Driver, cost of fuel,

service, maintenance, insurance etc. shall be included in lumpsum cost of the

contractor. The usages limit for each vehicle shall be 2500 Kilometres per month

ii. One number temporary site office of size 800 Sqft. at each site (Jamalpur STP/

Balloke STP /Bhattian STP fully air conditioned, with well-equipped furniture,

computer, printer/ scanner A3 size), Almirah, etc. with washroom.

g) Others

i. Supply of As-Built drawings after completion.

ii. Dismantled material from existing infrastructure shall be the property of the

contractor suitable credit for such material shall be considered by the bidder

while submitting bids. Detailed inventory of such material shall be prepared and

submitted to Engineer-in-charge for approval before removing such material

from site.

4. OPERATION AND MAINTENANCE

4.1. Scope of Work in Brief

The contractor shall operate and maintain the entire works and all other allied works

under this for 10 years O&M. It is to be noted that all costs on account of repairs of civil

and E&M works during the O&M, is to be borne by the contractor. Within his quoted cost,


54

the contractor is to ensure that all guarantees for quality and quantity are as per bid, and

are maintained during O&M period.

Sr. No. Component

1. Proposed 3 new intermediate pumping stations (IPSs) at Sunder Nagar, Gaushala and Tibba Road

2. Rising main from Sunder Nagar to STP Jamalpur including taping of pumping main from Gaushala and Tibba Road IPS

3. New main pumping station of 225 MLD (Average flow) at Jamalpur

4. New STP of 225 MLD at Jamalpur

5. 111 MLD UASB treatment plant at Bhattian

6. 50 MLD SBR treatment plant at Bhattian

7. Main pumping station at Bhattian

8. Rising main from Upkar Nagar to Balloke

9. Rising main from Kundanpuri to Existing manhole

10. Proposed 3 new intermediate pumping stations (IPSs) (Kundan Puri, Upkar Nagar & Lord Mahavir Hospital)

11. Main pumping station at Balloke feeding 152 MLD UASB plant

12. Main pumping station at Balloke feeding 105 MLD existing SBR plant

13. Main pumping station at Balloke for new proposed treatment plant

14. 152 MLD UASB treatment plant

15. Existing SBR treatment plant and new proposed treatment plant at Balloke.

16. ETP for dairy complex at Tajpur

17. ETP for dairy complex at Haibowal

18. Upkeep of plant and landscaping/ greenery, street lights, pathways etc.

The above list is indicative only, the scope of work shall include maintenance for the

complete infrastructure at 3 STP sites (Jamaplur, Bhattian & Balloke), 2 dairy ETP sites

(Tajpur & Haibowal), 6 proposed intermediate pumping stations, and rising mains. In case

of alternative proposal for intermediate pumping stations/ rising mains, the scope for

operation and maintenance shall include the infrastructure offered under alternative

proposal.

4.2. Treated Effluent Quality

During operation and maintenance contractor shall ensure treated effluent quality as

define in the scope of work

4.3. Detailed Scope of Work

The contractor, under the scope of this work shall carry out the following activities, but

these shall not limit requirement of other activities, which otherwise are required as per

terms and conditions of contract or to fulfill contractual responsibilities or are essential as

per good industrial practices. The contractor shall be responsible for:

a) To Operate and maintain the sewage treatment plants, intermediate pumping

stations, main pumping stations, dairy effluent treatment plants and rising mains in

accordance with the aim and purpose of treatment described above paragraphs.

This includes all civil, electrical, mechanical, instrumentation, laboratory and general

up keep of the area.


55

b) Continuous 24X7 operation of the pumping stations is to be ensured so that

incoming waste water / influent is pumped out to the treatment units without getting

accumulated in the conveyance system i.e. sewers/channels

c) Operation and maintenance of the existing infrastructure from the date of handing

over the infrastructure to contractor upto the date of commissioning of the entire

project. This is in addition to the 10 years period of the operation and maintenance

of the entire set up described above as the 10 year period shall commence after

commissioning of the entire project.

d) The contractor shall prepare a detailed operation schedule, preventing maintenance

schedule, need based maintenance/repairs and troubleshooting to be approved by

the Engineer-in-Charge. All the operation and maintenance activity shall be carried

out in accordance with the approved schedules.

e) During the operation and maintenance, the contractor or the Engineer-in-Charge

shall review these schedules periodically and revise these schedules as per site

conditions, operational results etc.

f) The contractor shall maintain sufficient quantity of spares, tools and consumables in

stock at site required for effective and efficient operation of the system.

g) It is an absolutely contractor’s responsibility to look after all sorts of maintenance

whether preventive, Minor, Major, or break-down.

h) At the end of each year of operation & maintenance period, an assessment of the

condition of the plant has to be done by the contractor and department jointly. On

that assessment the contractor shall, at no extra cost to the DEPARTMENT, repair

and re-condition all the civil, electrical, mechanical, instrumentation equipment to a

condition so that they are in running condition with regular preventive and

recommended maintenance as per manufacturer's recommendations.

During O&M, diffusers shall be checked regularly and replaced as per requirement.

After completion of 9 years O&M, all the electrical, mechanical, instrumentation, civil works,

piping and diffusers shall be thoroughly checked jointly by the contractor and engineer-in-

charge. As per findings of the joint inspection the defect shall be set right by way of repair/

service / replacement as the case may be.

i) The contractor shall operate and maintain all (E&M) equipment as per the

recommendations of the respective equipment manufacturer. However in case of

any doubt, the Department shall refer to best of the standards and the contractor

shall be bound to carry out the works accordingly.

j) The contractor shall use only the original and genuine spares of the original

equipment as per recommendations given in the maintenance booklet of the

manufactures/as per directions of the Engineer-in-charge. Test certificate of all

major equipment will be submitted from the manufacturer.

k) The contractor will regularly monitor the performance of sewage treatment plants

and dairy ETPs by conducting the analysis of the inlet sewage/influent and treated

effluent. In case the treated effluent is not meeting the desired standards, the

contractor, under intimation to Engineer-in-Charge, shall initiate and take adequate

actions to ensure satisfactory performance of the Plant.

l) The Contractor shall run the plant unit after ensuring proper voltage. He shall also

record all the power failures and voltage in daily log sheet. He will bring into the

notice of power supply agency as well as control room and Departmental Engineer


56

about the break down/power failure. He will also get the electricity restored

simultaneously.

m) The major repair work shall be carried on and completed under the exclusive

control, direction and supervision to the satisfaction of the Engineer-in-Charge. The

Engineer-in-charge shall have full power to reject or condemn any work or material

that he may deem unsuitable. The Engineer- in-charge shall have full powers to get

the same removed and replaced and deduct the expenditure incurred in the

process from any amount due or that may become due to the contractor.

n) Break down/damage of all equipment/instruments, due to any reason what so ever

it shall be the sole responsibility of the Contractor, without any additional cost to the

department.

o) All major break downs/failures (as defined in the agreed maintenance schedule)

shall be brought down to the notice of Engineer-in-Charge or his representative.

p) The indicating list of operation/maintenance activities is as follows, but not limited to:

Sr. No. Activity

1 Regular operation of all the units of all IPS, MPS, STP & ETP

2 Preventive scheduled maintenance for all civil, electrical & mechanical equipment and instruments.

3 Regular cleaning and maintenance of operation buildings including floors, toilet blocks, railing, doors, windows, light fixtures and ceiling etc.

4 Regular cleaning and maintenance of outdoor areas i.e. roads, pavements, lawns and light fixtures.

5 Regular disposal of screenings, grits, scum and sludge. The sludge produced shall be of desired consistency as specified in the bid document. The screenings and scum have to be drained dry (mechanically or manually) before disposal. These shall be disposed to a site earmarked by employer. However sludge being the property of contractor can be used by him for sale. However disposal of sludge at a site not earmarked by the employer shall not be allowed.

6 Maintenance of storm drainage system to avoid flooding of the installations.

7 Maintenance/ Replantation of plants/grass as per requirement.

8 Repair of civil structures, white washing and painting of all civil structures every two years or earlier if required.

9 Epoxy/ painting of all pipelines, railings, walls, electrical & mechanical equipment, instruments and other metal/wood work, every two years or earlier if required.

10 All the valves/gates which are not used regularly should be operated at least once a week and make sure that they are properly lubricated /greased.

11 All safety valves should be checked daily and ensured that they are working properly. In case of any fault the same should be attended immediately without any wait. Contractor shall keep all the safety devices in working order.

12 Launders/Weirs to be maintained clean round the clock.

13 During preventive/ breakdown maintenance, the pumping units or other machinery required if any shall have to be arranged by


57

Sr. No. Activity

the contractor at his own cost for completing the work.

14 Batteries are required to be maintained and replaced as and when needed.

15 To ensure proper functioning, daily/regular checking of following items is to be done and corrective measures, if required, to be taken immediately: Overflow from various units Sluice valves and gates Chokage of pipes Lubrication/Greasing of all moving parts of equipment,

gates and valves Electric connections to machinery/equipment Level Switches/sensors Various instruments Civil work of all the structures/buildings

Small bore Tube well and water supply pipe line etc.

16 Preventive/breakdown maintenance of all pumps, electrical, mechanical & instrument equipment, installed under the contract. All cost including cost of all material, equipment, etc. required for operation and/or maintenance (preventive and / or breakdown) to be borne by the contractor.

17 Maintenance of the lighting fixtures and the lighting system of the areas and replacement of all non-functional lighting fixtures within 24hours.

18 Maintenance of the stores for various equipment, spares and other materials. The maintenance of stores will include but shall not be limited to:

Loading/unloading materials received and issued for works.

Proper arrangement of material in stores to ensure its safety and easy availability.

Maintaining store area neat and tidy.

Keeping records and Accounting the incoming and consumed materials.

Watch & ward, safety of material, stores, installation etc. by the contractor.

19 Cleaning of sludge from Final Polishing Unit (FPU) by totally emptying at the end of 3rd, 6th and 9th year of O&M.

20 Working of all diffusers are required to be checked regularly and replaced as and when needed by the contractor.

21 Flushing of channels conveying dairy waste using mobile vehicles fitted with suitable pump and nozzle system.

q) All relays and HT equipment shall be calibrated and tested at least once a year and

the report shall be submitted to the Engineer-in-Charge.

r) In addition, the general hygienic standards must be maintained and adequate

plantation should be done.


58

4.3.1. Tests and Sampling Schedule During O&M Period

The sampling and testing schedule shall be carried out as detailed in the following table. The

Contractor’s schedule for tests and sampling shall also be maintained during the O&M

period.

SAMPLING PROTOCOL FOR STP PROCESS

Sr. No.

Parameter Frequency of Sampling

Type of Sample

1. Influent & Effluent Temperature Daily Grab

2. Influent & Effluent pH Daily Grab

3. Influent and Final Effluent BOD5 Daily Grab

4. Influent and Final Effluent COD Daily Grab

5. Influent and Final Effluent TSS Daily Grab

6. Influent and Effluent Ammonical Nitrogen Thrice a week Grab

7. Influent and Effluent Fecal Coliforms Daily Grab

8. Influent and Effluent Total Phosphorous Monthly Composite

9. Influent and Effluent Total Nitrogen Thrice a week Grab

10. Aeration Tank, D.O. MLSS and SVI Daily Grab

11. Primary Sludge VSS, TSS and Specific Gravity Thrice a week Grab

12. Secondary Sludge VSS, TSS and Specific Gravity

Thrice a week Grab

13. Dewatered Sludge after mechanical dewatering. Once a week Grab

Note:

1. BOD5, COD & TSS of treated sewage shall be checked on a composite sample

as directed by Engineer-in-charge.

2. The composite sample means a sample prepared by taking every two hours &

mixing then in proportion of the flow.

3. Timing for grab samples are to be decided by Engineer-in-Charge.

General

4.3.2. No equipment shall remain idle or un-attended or damaged for the period of more than 3

days. If any equipment is not repaired, rectified and or replaced within 3 days, the

contractor will be penalized.

4.3.3. Technical Audit

The Department has the right to conduct a technical audit of the Facility and to perform

any analysis or inspection it deems necessary. The Contractor shall at his own cost

provide all assistance to the Department required to complete these inspections. Such

audits may cover all or any of the obligations of the Contractor, including without limitation.


59

(a) Verification of the system capacity and save for normal wear and tear during the

O&M Period.

(b) Verification of the performance standards and useful life of the individual assets

of the Facility, save for normal wear and tear during the O&M Period.

(c) Verification of the capacity of the Facility to meet Output Standards during the

residual life of the Facility and save for normal deterioration expected during such

residual life.

(d) Sampling, testing and verification of the Output Standards for treated sewage,

sewage losses.

4.3.4. Faculty Visits

(a) At any time or at the end of each twelve month period, or at the initiative of the

Engineer-in-Charge, a visit shall be organized so that both parties can check the

condition of the installations at the facility.

(b) A report shall be drawn up to record the opinions of the both parties. The Engineer-in-

Charge reserves the right to call the equipment manufacturers or specialized

technicians for these visits. All expenses are to be borne by the contractor for the

purpose.

4.3.5. The Department will be at liberty to post its staff for surveillance/ inspection at the

plant along with access to all units, control room and records, log books, MIS

(Management Information system), data etc. round the clock as required. The

logbooks are attested by the staff from authorized Department officials and this record

shall be open for further inspection/checking by Department and all other Government

Agencies CPCB/PPCB etc. for further action/improvements/rectifications.

4.4. Man power

i) The staff employed will be provided with all the required safety equipment. It shall

be ensured that full safety measures are taken by the staff on duty. Staff

employed shall be experienced and trained to handle the respective

job/equipment.

ii) The work shall be carried out on a 24 hrs basis, without intermission and the staff

deployed by the contractor shall be in accordance with this contract.

iii) List of names of staff is to be given by the agency to the Engineer-in-charge and

advance intimation to be given before deputing/removing any staff from site

during the period of contract.

iv) Engineer-in-charge shall be authorized to direct the contracting agency to remove

any or all staff employed on O&M of the plant if in his opinion continued presence

of such staff is detrimental to safety or proper O&M of the plant. The contractor

shall comply with such directions & post suitable substitute(s) thereof immediately

within 24 hours. Whenever the Engineer-in-charge has informed the contractor in

writing that any person on the work is in his opinion unsatisfactory or incompetent,

or unfaithful or dishonest, untruthful or disorderly or to be otherwise

unsuitable/such person shall be discharged by the contractor from the work and

shall not be employed again on it.

v) The contractor shall give or provide all necessary superintendence during the

O&M and as long thereafter as the Engineer-in-charge may consider necessary.


60

Such superintendence shall be given by a competent person having adequate

knowledge of the Operation and Maintenance to be carried out (including the

methods and techniques required), the hazards likely to be encountered and

methods of preventing accident as may be required for the satisfactory working of

the entire plant.

vi) Minimum manpower requirement for Operation in 3 shifts for the IPS, MPS and

STP/ETP is as under. However, the contractor shall deploy additional man power

and experts as required to operate and maintain the system as per scope of work.

The contractor shall issue identity card to the manpower deployed.

vii) The contractor will employ no offence guilty person or indiscipline man. Right is

reserved by Department for suspension, dismissal, termination of any officer /

staff employed by contractor. He shall take prior permission to employ or to

terminate his personnel.

viii) The presence of staff should be marked in register to be maintained at office of

shift-in-charge at Sewage Treatment Plant that shall be considered as final.

ix) Indicative minimum manpower is as follows:

a) New STP & MPS Jamalpur and three IPS feeding Jamalpur STP

S. No.

Manpower Number

1 Plant Manager 1

2 Chemist 1

3 Laboratory Assistance 2

4 Plant Operators / Pump Operators 9

5 Electrician cum Mechanic 1

6 Sewer Men/Helpers 12

7 Chowkidar/ Mali 4

b) Bhattian

Existing MPS including modifications

Existing 50 MLD SBR STP and 111 MLD UASB STP including

modifications

S. No.

Manpower Number

1 Plant Manager 1

2 Chemist 1

3 Laboratory Assistance 2

4 Plant Operators 7

5 Electrician-cum-mechanic 1

7 Sewer Men/Helpers 15

8 Chowkidar/ Mali 3

c) Balloke

Two existing MPS including modifications

One new pumping station

152 MLD UASB Plant including modifications

Existing SBR based STP and one new STP

Three IPS and Rising main.

S. No.

Manpower Number


61

1. Plant Manager 1

2. Chemist 1

3. Laboratory Assistance 2

4. Plant Operators 15

5. Electrician 1

6. Mechanic 1

7. Sewer Men/Helpers 24

8. Chowkidar/ Mali 5

d) Two Dairy Waste ETPs at Tajpura & Haibowal including Conveyance System

S. No.

Total Manpower for both ETPs Number

1. Plant Manager 1

2. Laboratory Assistance 2

3. Plant Operators 7

4. Electrician-cum-mechanic 1

5. Sewer Men/Helpers 14

6. Chowkidar/ Mali 4

4.5. Reporting

a) The contractor will be responsible for keeping up-to-date record of documents

including History Card for equipment and maintaining every day log book relating to

various data analysis performed as decided by Engineer-in-Charge.

b) Sewage Treatment Plants/Effluent Treatment Plants / Pumping Stations

The indicating lists of recording activities during operation/maintenance period are

as follows, but not limited to:

Sr. No.

Activity

1 To maintain and update logbook, in which details of operational parameters at the inlet and outlet of STP / ETP are recorded every day.

2 To prepare and submit a weekly report of plant performance which will assist the Department in preparing the necessary documents for their purpose and records.

3 To maintain record of troubleshooting points and details of events causing trouble, which shall be used for updating the contents of manual.

4 To maintain the operational activity record of maintenance work whether preventive or break down.


62

5 To maintain and update logbook data:

Which includes History-Card of each equipment at regular interval

Running of all Electrical and Mechanical Items, Consumption of energy, fuel and other consumables etc. and

various analysis performed.

6 To maintain the operation and maintenance data of the following: Daily status record of STP, IPS & MPS Daily flow record Daily sampling record Operation record of mechanical screens Sludge Quality and Quantity on daily basis An inventory of the chemicals and spare parts available at the

end of the reporting period. O&M staff deployed by the contractor during the reporting

period. Any major repair works, if any with its remedial actions.

7 To maintain hard and Soft copy of data available on PLC monthly.

8 All records to be maintained in hard as well as Digital mode

c) Preparing data recording, correspondence work to Department and Government

Departments, etc. all should be done as per standard practices and by following

labour, factory, electrical, Punjab Pollution Control Board (PPCB), and all other

applicable laws, Indian standards etc. as applicable to Local, State and Central

Government of India.

d) Sample Indicative / Reporting Formats Are As Follows:

I. Hourly record of Flow as measured / recorded through the Notch / Weir

/ Flow meter:

Date/ Time

Head Over The Notch / Weir/Meter

Rate Of Flow

Average Rate Of Flow in Past Hour

Cumulative flow during

day

/ / Mtrs. M3 /hour M3 /hour M3 0800 0900 1000 1100 1200

II. REPORT FORMAT FOR DAILY TESTING SCHEDULE FOR VARIOUS

PARAMETERS

Test/ Parameter

Inlet To Receiving chamber

Outlet after Secondary Treatment

Outlet after Tertiary

Treatment


63

Any other performa as per the format decided by the Engineer in Charge.

e) Reporting for all IPS / MPS

i. Records of Operation and Maintenance of Pumping Station

Operational Records

Sr. No. Particulars Running Total Time

Remarks Reading Taken by From (Hrs) To (Hrs)

1.

Pump Operation Pump 1 Pump 2 Pump 3

ii. Monthly Report on Operation & Maintenance of Pumping Station (Electrical)

O & M Report for the Month: Year

iii. Maintenance:

Repair history of all mechanical, electrical and instrumentation control equipment Logbooks.

Every day power availability, input voltages, KVAH and KWH meter, power factor readings at pumping station.

Daily operation of pumps with readings for operating voltage, amperage and power factor, pressure on the manifold, pressure at outlet of pumps and flow rate in manifold.

In addition to maintenance of above log-books, the contractor is required to maintain one inspection book at pumping station. Submission of monthly report.

4.6. Consumables

a) All consumables, chemicals are to be arranged by the contractor himself. The work

also includes the use of oil, grease, lubricants required for operation and

maintenance of the Plant which will be arranged by the contractor himself.

Sr.

No.

Details

of Break

down

Details of

Break down

Maintenance

done

Details of

spares /

consumable

s consumed

Average

power

factor

Total

Average

KVA

Demand

over the

month

Total

KWH

Consum

ed

Remark


64

b) The contractor will determine operating parameters, select settling (Chemical doses

etc.) and generally optimize the process, and working of the treatment plant.

Excessive chemical dozing i.e. dose more than normal should be avoided.

c) The contractor should plan & procure all spares, Polyelectrolyte and all

consumables including chemicals, grease, lubricating oil, cleaning agents,

laboratory reagents, rubber bush, graphite packing, rubber sheet, nut-bolts, etc.

Further the contractor will plan about the requirement well in advance (At least 3

month) and procure the material from the market as per the DEPARTMENT

approved list & as per the O& M manual or as per the existing manufacturer’s brand.

d) All chemicals including chlorine gas consumed to operate the Sewage Treatment

Plant and other facilities under this contract will be borne by the contractor.

e) POL (petrol/ Diesel Oil & Lubricants) has to be arranged by the contractor as and

when needed as per manufactures recommendations for periodical maintenance of

entire plant. The Department will not provide such items. Only diesel for DG Set will

be reimbursed to the agency upto the extent of average guaranteed Power

consumption.

4.7. Commercial

a) The Contractor will ensure working of Plant round the clock. In case of any failure on

the part of tenderer for successful running and operation of the plant or unit, the

same will be attended by the Engineer-in-Charge and will be operated at the risk

and cost of the Contractor and necessary deduction will be made from the bills/

performance guarantee/ deferred payment of the tenderer or any other some

available with the department as decided by the Engineer-in-Charge, whose

decision will be final.

b) Waste water flow to operate and maintain the plant will be provided by the

department free of cost whereas the contractor will have to make his own

arrangement with regard to safe and potable water for the staff working at site and

for operational requirement.

c) The power charges will be borne by the department. However, power charges

beyond average guaranteed power consumption for the raw sewage treated shall be

borne by the bidder.

d) If at any moment it is noticed that due to violation of any of above procedure and

negligence of contractor any of the equipment is damaged, the action against

contractor shall be initiated immediately terminating the contractor / recovery of the

cost of equipment / loss due to negligence of the contractor from the bills/

performance guarantee/ deferred payment of the tenderer or any other some

available with the department as decided by the Engineer-in-Charge, whose

decision will be final.

e) In case of any theft/missing of equipment/part the successful Contractor will be

liable to pay the cost including damages to the department.

f) All Central/State Government/Semi-Government/Local Body’s Rules and

Regulations pertaining to this contract shall be followed and observed by the

contractor without any extra cost to the Department.

g) Contractor is responsible for watch and ward, security, storage, housing

accommodation at his own cost.

h) It is to be noted that all costs during the O&M period, excluding the cost of power/

diesel within the guaranteed power consumption for the sewage treated to be borne


65

by the contractor, within his quoted cost. The contractor is to ensure that the

following guarantees are maintained during the operation & maintenance period:

Quality of treated effluent

Working of automation system

Consumption of power

i) In the event of any damage/loss of life/theft of property, due to negligence on the

part of Contractor, the Contractor shall be solely responsible and liable for

compensation and damages. Regarding negligence and compensation the decision

of Engineer-in-Charge shall be final.

j) All necessary transports shall be arranged and made by the Contractor at his own

costs including transport vehicles required for safe disposal of screening material,

grit within the distance specified by the Engineer-in-Charge.

k) All the plant, building land, Sewage treated / untreated, etc. shall remain the

property of Department.

l) In addition to the regular in house testing at the STP/ETP Laboratory, monthly

testing of sample shall be carried out by PPCB before 20th of every month or by the

contractor from the laboratory approved by Punjab Pollution Control

Board/Engineer-in-Charge. The cost of testing from PPCB or from any other

accredited outside laboratory will be reimbursed to the contractor on actual basis on

production of the expenditure receipt.

m) POL (petrol/ Diesel Oil & Lubricants) has to be arranged by the contractor as and

when needed as per manufactures recommendations for periodical maintenance of

entire plant. The Department will not provide such items. Only diesel for DG Set will

be reimbursed to the agency upto the extent of average guaranteed Power

consumption.

n) The operation and maintenance of the existing set up at 3 STP sites (Jamalpur,

Bhattian & Balloke) and existing IPS (Sunder Nagar, Gaushala & Tibba Road) shall

be handed over to the contractor on approval of Service Improvement Plant.

o) The handing over of the operation and maintenance of existing infrastructure by the

Municipal Corporation, Ludhiana can be in one lot or in parts. The contractor would

be paid as per actual time of maintenance on pro rata basis upto the completion/

commissioning of entire infrastructure as per contract.

p) For the infrastructure to be developed by the contractor sectional commissioning

and commencement of operation and maintenance shall be accepted. For sectional

commissioning, the contractor shall be paid for actual period of operation and

maintenance on pro rata basis.

4.8. Service levels

a) The contractor shall have to issue identity cards with photographs to all the staff

employed for Operation and Maintenance. The list of the same shall be submitted to

the Department mentioning qualification & experience as well as display on board.

b) The Supervisor / Plant Manager of contractor will always remain in contact with the

Junior Engineer, Sub Divisional Engineer-in-Charge of the Plant deployed by the

Department and shall follow their instructions.

c) It is required that at least once in every quarter a technical expert other than the

regular maintenance Staff of the contractor will visit plant and will suggest if

required, to improve the efficiency and working of the plant etc. No separate


66

payment will be made for such visits. The visit must be recorded and outcome of the

visit / minutes of the meeting should be got signed by Department authorities without

which the visit shall not be considered.

d) The contractor shall assist the department in all formalities required from all

Government authorities i.e. Forest, PSPCL, PPCB etc. for having NOC, water

consent, Hazard waste concern, approval etc. shall be got done by the contractor.

e) Any other services required for smooth running is also in the scope of work.

4.9. Safety / Security

a) The contractor shall take all safety precautions under various Acts/Rules under

central/State Govt. from time to time and he shall be responsible for safety of its staff

and the consequences thereof. The contractor shall deploy round the clock security

personnel at entrance of plant’s premises and in the compound for the safety of the

plant and premises, equipment and personnel during this period.

b) Responsibility for damages

i. The care of the whole of the permanent works shall remain with the contractor

who shall be responsible for all accidents or damages from whatever cause

arising and chargeable for anything that may be stolen, removed, destroyed or

damaged to whomsoever belonging and also for making good all defects and

damages to the said works or to any property adjoining or any cause whatever,

whether such damage or defects were occasioned by the negligence of the

contractor or not or may be or might have been recovered during the progress

to be known after the completion whereof or whether payment may wholly or

partially have been made or the works approved as supposed to have been

properly done and no certificate of approval of any works by any officers or

members of the Board shall affect or prejudice the right of the PPCB against

the contractor or to be considered or held as at all conclusive as to the

sufficiency of any work materials.

ii. Adequate safety precautions against fire, flooding, lightening, electrical shocks,

accident due to moving/non-moving heavy/light equipment shall be strictly

observed by the contractor at his own cost.

iii. Suitable safety measures like gumboots, gloves, safety belts, ladders, safety

lamps, gas masks, Oxygen apparatus, insulated tools, alarms etc. shall be

provided by the contractor. Necessary medical first aid kit shall be made

available all the time. In absence of observance of above safety precautions,

the contractor shall be responsible for any unforeseen loss of the equipment or

persons dealing with it. Special care shall be taken by the contractor while

carrying out the work in sewage gas zone. Any incidence of human life or

accident will be totally contractor’s responsibility.

iv. The contractor shall ensure that the staff employed takes all necessary

precautions while carrying out the work either in shift duties or any general shift

as per Indian Electricity Rules/Factory Act/CPHEEO Manual, or manufacturer’s

special instructions for safety / gas handling. The staff should use Gas masks,

Oxygen apparatus, Gum Boots, Safety Belts and Safety Lamps, etc. while

carrying out the work in Bar Screens, sumps, etc.

v. The contractor will make arrangement for all necessary safety equipment for

persons working at Work as per Factory Act/Safety Rules. In the event of any


67

accident on or off site, in which the contractor or his personnel are involved, in

which an injury occurs to any person whether directly concerned with the

project or a third party, the contractor shall inform Department within 24 hrs. of

the occurrence of the event. The plant will be open to local/state/central

agencies for verification of safety/emission/acts compliance.

vi. During night hours, the main gate should be locked. However, shift duty staff

should be alert and open the gate during surprise checking of Department staff

or any other Government Authorities or his nominee without any wait. Only

bona-fide persons be allowed in the plant premises being a prohibited area.

Smoking and drinking are prohibited in the plant. The staff engaged shall wear

common uniform with name plate indicating name and designation during duty

hours.

c) The contractor has to make sure that proper fire extinguishers are used to cover

any kind of fire during any mishap within the total boundary area including plant

machinery. The expiry period of refills of various fire extinguishers should be

watched and maintained in top working conditions during the period of contract.

d) The contractor shall not remove/shift any equipment/machinery even temporarily

without written permission of the Engineer-in-charge or authorized representative.

e) Though the contractor has to operate and maintain all the equipment/machinery,

PLC, lighting (plant area, boundary walls, gate lighting etc.) but the machine of the

equipment under warranty should not be dismantled without prior permission of the

Engineer-in-charge. The list of such equipment (Under warranty), if any, will be

given by the contractor. The contractor has to provide necessary protection

systems wherever necessary including alarms and fire extinguishers.

4.10. Release of Hazardous Substances or Hazardous Waste

i. The Contractor, after first notifying the PPCB shall be responsible for fulfilling all

requirements associated with any release of any substance into the environment

(from the facility or the site) as required by Applicable law or by any Legal

Entitlement including but not limited to the notification or reporting of releases /

Hazardous substances or Hazardous Waste. The Contractor shall prepare a

memorandum evidence such notification or reporting and provide copies thereof to

the Board, along with any documents provided to the relevant regulatory agency

regarding such release.

ii. The contractor shall process and obtain the clearance of all such agencies however

necessary support and help should be provided by PWSSB/M.C. as required for the

purpose, including all clearances during 10 years O&M period. He shall be fully

responsible to comply with all requirements of Laws including hazardous

substances, emission standards for air, discharge standards for effluent oil, sub-soil

pollution.

iii. The contracting agency shall not release any hazardous/toxic materials inside the

premises.

a) Gas coming out of sewage is hazardous containing Methane, CO, CO2 and

H2s etc. Therefore, necessary precaution and measures are to be taken in

regard to human life and installations. The Contractor shall know all

Central/State Government/Semi-Government/Local Bodies rules regulations to

this contract without any excuse.


68

b) Contractor will comply with all safety rules and regulations and all inter

disciplinary as followed by the Department. The Department will not be

responsible for any accident /injury to the staff of the contractor. Further the

Department will not provide any insurance or medical facility to the staff of

contractor. The responsibility lies with the contractor.

4.11. OPERATION AND MAINTENANCE MANUAL

(i) The contractor shall prepare a detailed program (referred to as O&M Manual)

covering the operation and maintenance of the treatment Plant as a whole. This

program shall include the work and activities described in this Chapter, as

relevant to the specific items and technology notwithstanding the program

submitted and approved, the Contractor is deemed to have tendered for and

covered in his price, the responsibility for operating and maintaining the

treatment plant for the full period of the contract, thereafter handing it over as

specified.

(ii) The contractor shall provide 4 copies of draft O&M Manual of STP / ETP /

Pumping Station to the department, at the time of the commissioning of the

project/ component. The draft of the O&M Manual shall be subject to the review

and approval of Department, which shall have the right to make any changes

and revisions to the O&M Manual as it may deem appropriate. The Contractor

shall revise such draft O&M Manual prior to the commencement of the O&M

period.

(iii) The O&M Manual for STP / ETP / Pumping Station shall include the daily,

weekly, monthly, quarterly, half yearly and annual checks and remedies if

necessary to be performed for effective operation of the plant, elaborate details,

all operating and maintenance procedures and policies which are required,

advisable and / or necessary for the Facility to achieve full compliance with the

operational guarantees and to achieve maintenance and repair standard for the

Facility which will ensure compliance with the maintenance specifications.

(iv) At the end of the construction period, the contractor shall revise the draft O&M

Manual to reflect any updates, changes or revisions it deems appropriate, inter-

alia based on its experience and as necessary to reflect any modifications or

adjustments to the plant. Without limiting the above, the contractor shall annually

review, revise, update and modify the draft O&M Manual as may be necessary

or appropriate. Any revision to the draft O&M Manual shall be subject to the

review and approval of Department.

(v) During the term of this Agreement, the contractor shall promptly notify

Department of any revisions, additions or modifications which he, in his

professional opinion, believes should be made to the O&M Manual, whether as

a result of additional experience in operating and maintaining the Facility,

changes in influent quality or volume, changes or modifications to any

equipment, part, component or structure incorporated in the Facility. Such

notification shall set forth the reason for the proposed revision. Any proposed

revision shall be subject to the approval of the Department. In addition, during

the term of this Agreement, Department shall have the right to have relevant

changes, revisions, or additions to the O&M Manual as it, shall deem

appropriate to ensure full compliance with the O&M Standards.


69

(vi) The contractor shall submit 5 copies of the final O & M manual along with a soft

copy in Microsoft Word Format for STP / ETP / Pumping Stations.

a) Co-ordination with other contractors and / or agencies responsible for the

Execution, operation and maintenance of services.

b) Updating and periodic submissions of the operation and maintenance

manual. The contractor shall take up all periodic maintenance works

provided in the approved O&M manual.

c) The contractor shall provide on the job training to the Departments staff as

per specifications. At the end of the one year of O&M period, an

assessment of the condition of the plant will be done by Departments

Representative and based on the assessment, the contractor shall, at no

extra cost to the Department/DULB, repair and re-condition all the civil

works, electrical & mechanical instrumentation, equipment in the

concluding month of the O&M period to a condition so that they are in

running condition.

d) Updating and periodic submissions of the operation and maintenance

manual as defined in specifications for O&M works. The contractor shall

take up all periodic maintenance works provided in the approved O&M

manual.

e) Co-ordination with other contractors and / or agencies responsible for the

Execution, operation and maintenance for regional schemes and Electric

Supply Company.

f) The contractor shall be solely responsible for the safety and security of

the goods in the store and its accountability and will be responsible for

any loss or damages in stores for any reason. He shall maintain insurance

cover against the value of the goods in the stores without any additional

costs on the Department.

4.12. Spares

a) Contractor is advised to maintain the spare parts as per pre planned schedule.

b) The contractor will provide the necessary tools and tackles required for day-to-day

maintenance.

c) Frequency of spares used in maintenance of electrical, mechanical equipment must

be recorded for updating the contents of manual.

d) Providing adequate spares and maintaining adequate inventory of accessories or

equipment itself for repair of system so that the electrical, mechanical, pipe and pipe

appurtenances, can work efficiently as per the guarantees given or minimum

required efficiencies asked for in the contract, without any additional cost. At the end

of the contract the contractor shall hand over the spares, tools, tackles to the

department.

4.13. Taking Over

The plant will be taken over by Department on satisfactory completion of the

Operation & Maintenance period of the plant after following conditions:

(i) The plant /equipment are in good, smooth running condition.


70

(ii) The result of the treated wastewater quality (for last three months of operation) of

the plant is within the limits specified.

(iii) In case of major repairs /replacement of equipment, the performance guarantee

for such unit/equipment is extended by six months from the date of putting back

in to satisfactory operation of such unit/equipment in case such putting back is at

the end of completion of operation & maintenance period.

(iv) All records of operation & maintenance are handed over to Department in proper

condition.

(v) In case taking over is delayed on account of contractor's failure, the operation &

maintenance period will be extended further till it meets the requirement without

any extra cost to Department. The contractor will also be penalized for such

delays.

4.14. Penalties

a) As per agreement, staff should always remain present as per schedule; otherwise

penalty towards absence of any staff shall be recovered from the Contractor as

per liquidated damages for deficiencies. The contractor shall make the

arrangement of reliever for weekly off/holiday etc.

b) Monitoring should be done as per guidelines given by Engineer-in-Charge.

Contractor has to maintain all the parameter of effluent within stipulated limit as

per contract or he will be penalized for not maintaining the parameters given by

Department. All expenditure incurred for the same like, suite fee, court fee, case

fee, or the penalty as decided by Engineer of Department and penalty charged by

PPCB, NGT or any other Law enforcing Government Agency, will be charged to

contractor and deducted from the bills/ performance guarantee/ deferred payment

of the tenderer or any other some available with the department as decided by

the Engineer-in-Charge, whose decision will be final.

c) Contractor will have to maintain required Power Factor as per PSPCL rules and

regulations. In case penalty is levied by PSPCL for not maintaining the Power

Factor the same will be recovered from the contractor.

d) Liquidated damages for failure to achieve the functional guarantees

The Employer will be entitled to recover any such damages from the monthly

progressive payments to be made to the Contractor in the month in which the

failure occurred.

e) The Contractor shall not be liable for Non-Performance penalty to the extent such

failure is attributable to an Event in which the Contractor has taken necessary

steps to mitigate the effects of the event and operate the system in accordance

with the standards of a reasonable and prudent way.

f) Output & Overall guarantee

The contractor is fully responsible for treating all the Sewage limited to design

capacity of STP / ETP, reaching at the STP/ ETP. The performance of the

contractor shall be treated as unsatisfactory, if he fails to treat the complete

sewage or does not maintain the guarantees listed in the contract.

g) Liquidated damages for Operation & Maintenance shall also be applicable

as under:

1. Liquidated damages for deficiencies in Operation & Maintenance for STP and

MPS are listed as below:


71

Sr

No Description Nature of Deficiency Liquidate damages

A) Deficiency in Manpower

Plant Manager Not Present on duty Recovery will be made

on per day basis for an

amount double the DC

rate as applicable on

the date of deficiency.

Chemist Not Present on duty

Laboratory Assistant Not Present on duty

Plant operator Not Present on duty

Electrician Not Present on duty

Mechanic Not Present on duty

Sewer man/Helper Not Present on duty

Watchman cum

gardener

Not Present on duty

B) Deficiency in service

1 Cleaning of site Not attended up to 1

day

Rs.500 per day beyond

1 Day per site.

2 Non-compliance with

safety measure (e.g. not

wearing safety belt,

helmets, etc.) and first

aid facilities.

Any time on duty Rs.500 per occurrence

per site

3 Non-observation of

Preventive Maintenance

Schedule

Any time on duty Rs.500 per occurrence

per site

4 Delay in getting the

equipment not repaired/

rectified/replaced within

3 days.

Penalized with no limit

@ Rs.2000/day delay

each Individual

equipment of Plants.

C) Liquidated damage for power consumption

1 Power consumption

(For STP only)

Actual power

consumption exceeds

the guaranteed power

consumption (calculated

for the quantity of

sewage treated during

the month based on the

guaranteed power

consumption quoted by

the bidder and accepted

by the Employer)

The Excess power

cost will be recovered

from the contractor.

Note: Manpower deployed shall be allowed one weekly rest and three casual leaves

per quarter for the purpose of calculating deficiency in manpower

deployment.

2. Liquidated damages for non-compliance of treated effluent standards shall be

applicable for all of the components:


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Event triggering the

recovery of Liquidated

Damages

During the O & M Period

Liquidated

Damages

Frequency

Non-conformance with BOD

Standards

Rs 200.00 Per MLD for every day of

non-conformance per

STP/ETP

Non-conformance with TSS

Standards

Rs 200.00 Per MLD for every day of

non-conformance per

STP/ETP

Non-conformance with

faecal coliform

Rs 1400.00 Per MLD for every week of

non-conformance per

STP/ETP

Non-conformance with other

parameter as per DNIT

Rs. 200.00 Per MLD per parameter

per STP/ETP for each

testing as per contract.

5. TIMELINE FOR COMPLETION OF PROJECT COMPONENTS

S.No

Component Timeline (Months from Commencement of the

Project)

1 Construction and Commissioning of IPS at Sunder Nagar, Gaushala and Tibba Road

24

2 Providing and Laying of rising main from Sunder Nagar-Gaushala-Tibba Road-STP Jamalpur

24

3 Construction and Commissioning of 225 MLD capacity STP & MPS at Jamalpur

24

4 Construction and Commissioning of ETP for Dairy Waste at Tajpura Road

24

5 Rehabilitation of Existing Main Pumping Station at Bhattian

12

6 One time repair of 50 MLD existing STP on SBR Technology at Bhattian

12

7 Rehabilitation of Existing 111 MLD STP based on UASB Technology at Bhattian

12

8 Arrangement for Mechanical dewatering of sludge from existing 111 MLD UASB Plant at Bhattian

12

9 Additional Chlorination Plant at Bhattian 12

10 Construction and commissioning of IPS at Kundan Puri, Upkar Nagar and Lord Mahavir Ayurveda Hospital

24


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11 Providing and Laying of rising main from Upkar Nagar-Lord Mahavir Ayurveda Hospital-Balloke STP

24

12 Providing and Laying of rising main from Kundan Puri IPS to Sewer Manhole

24

13 Construction and Commissioning of 225 MLD capacity STP & MPS at Jamalpur

24

14 Construction and Commissioning of ETP for Dairy Waste at Haibowal Village

24

15 One time repair of 105 MLD existing STP on SBR Technology at Balloke

12

16 Rehabilitation of Existing Pumping Stations (2 No.) at Balloke.

12

17 Rehabilitation of Existing 152 MLD STP based on UASB Technology at Balloke

12

18 Arrangement for Mechanical dewatering of sludge from existing 152 MLD UASB Plant at Balloke

12

19 Additional Chlorination Plant at Balloke 12


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6. DETAILED DESIGN CRITERIA OF NEW 60 MLD STP AT BALLOKE

Raw Sewage Pumping Station for New STP at Balloke

Design Requirement

Design Requirement described here are in general for various works. However

specifications for only those Materials /Equipment/ Instruments shall be applicable

which are required or provided at site. If the specification of any items are not

described here then specifications as per the relevant IS code or prevalent as per the

department practice will be applicable as approved by Engineer-in-charge.

6.1. Components of Main Pumping Station

6.1.1. Civil Works

i. Distribution chamber ii. Receiving Chamber iii. Screening Channel iv. Wet well/Collecting Tank v. Panel Room vi. Roads & Pavements vii. Platform /Foundation for Diesel Generating Set &Transformer viii. Cable Trench, wire mesh around transformer ix. White washing/painting etc. x. Hand Railing xi. Pumping main from MPS to inlet chamber of STP xii. Valve chamber/platform to house common header, all valves, NRVs etc.

The component of MPS shall be worked out by the bidder so as to ensure

treatment from existing SBR based STP and new proposed STP using sewage

from 90” & 60” existing sewers.

I. Distribution Chamber

Rising main from IPS of Lord Mahavir Ayurveda Hospital shall be directed to

distribution chamber along with 90” and 60” existing sewer lines, for flexibility in

handling of incoming Sewage (Refer Drawing). Suitable retention time shall be

provided for designing of this chamber. C.I gates (Manually Operated) of suitable

size shall be provided at the inlet of Distribution chamber. Adequate RCC Platforms

shall be provided at the upper level to enable operation. Railings shall be provided

around the entire periphery of the platform.

Following are the Connections from / to Distribution chamber

Tapping from 90” Sewer line

Tapping from 60” Sewer line

Proposed Rising main from shaft No.5 near Lord Mahavir Ayurvedic Hospital

Distribution chamber to Existing Main Pumping Station

II. Receiving Chamber

The deep gravity outfall sewer, from Distribution chamber, will discharge the raw

sewage into a Receiving chamber. The function of the Receiving chamber is to


75

distribute the flow to screens. The Receiving Chamber shall be designed for peak

flow. The Receiving chamber shall consist of sluice gates on upstream for flow

regulation. The receiving chamber shall be of adequate size to meet the

requirements of workability inside it. C.I gate (Manually Operated) of suitable size

shall be provided at the inlet of receiving chamber. The entire construction is in

minimum M-30 grade concrete and as per IS 3370. RCC access platform minimum

1200 mm wide with GI pipe railing as per specifications shall be provided:

Number of Units : 1 (One)

Minimum Detention period : 30 Sec at Peak Flow

Min Free board : 0.50 m

III. J Type Removable Bar Thrash Screens

Manual Trash screen to be installed in front of coarse mechanical screens to prevent large and medium sized floating wastes from entering into intake structure of pumping station.

The manual screen should comprise of flat bars spaced apart in vertical with 50mm

opening within a sturdy frame structure inserted in vertical guide channel. Structure

provided should be with perforated basket at its bottom and guide roller on both

sides for easy removal. Guide channel extend upto to top of platform for guiding

upward movement. The height of trash screen should be 0.5 m above sewer crown.

Material of construction should be in SS-304. Flat size shall be of 10 mm thick

50mm wide.

Number of Units : 2 Working each of

50% Peak Flow capacity

Velocity through Screen at Average Flow : 0.6 maximum

(m/sec)

Velocity through Screen at Peak Flow (m/sec): 1.2 maximum

Height of Mesh Screen : 0.50 m above sewer crown

Wheeled Trolley : 2 No.

All other accessories, whether specified or not, but required for completeness of

contract shall be in contractor’s scope. Railings shall be provided around the entire

periphery of the platform and structure.

The provision of EOT crane, any kind of cleaning/raking mechanism, collection

bins/portable screen container, water jetting arrangements & trolley etc. shall be

provided.

IV. Coarse Screen

Two mechanical screens working and one manual screen standby of 20 mm clear

spacing shall be provided with each screen designed for 50% of peak flow capacity.

The mechanical and manual bar screens shall be made of 10 mm thick Stainless

Steel (SS 304) flats respectively. The mechanical coarse screens shall be of

Inclined Rake Type of 20 mm opening as per the specifications detailed elsewhere

in the bid document. Bin and chute arrangement shall be provided to take the

screenings. The screenings dropped from chute will be collected in a wheel burrow.


76

Manually operated CI gates are provided at the upstream and downstream ends to

regulate the flow.

Adequate RCC Platforms shall be provided at the upper level to enable operation.

Railings shall be provided around the entire periphery of the platform. The entire

structure is to be minimum M-30 concrete and as per IS 3370 including the platform.

RCC staircase 1200 mm wide shall be provided for access from the ground level to

the top of the unit & to the operating platform.

Number of Units : 2 Mechanical (Working) + 1 Manual

(Standby) each of 50% Peak Flow

capacity

Approach Velocity at Average Flow (m/sec) : 0.3


(m/sec)

Velocity through Screen at Peak Flow (m/sec) :1.2 maximum

Height of Screen bars upto dead plate : 1 m above sewer crown


J Type Manual Thrash Screen

Mechanical coarse Screens

Manual coarse

Screens

1 Balloke 2 2 1


contract shall be in contractor’s scope.

V. Wet Well

The Main pumping station (MPS) shall be a rectangular concrete structure. The

sump well is to be in R.C.C of min Grade M-30 and shall be designed for peak flow.

The maximum operational liquid level in wet well shall be such that, minimum

100mm Freefall is maintained from Invert of Screen Chamber to Water level of wet

well. The capacity of the wet well sump should be kept such that the detention time

of the sump should be at least 5 minutes peak flow. The wet well shall be divided

into two equal compartments upto full height with sluice gates in common wall.

The pumps shall be installed equally in two compartments. Area of gate(s) should

be sufficient so as to divide the flow into any of the compartments, at a velocity not

more than 1.2 m/sec.

The arrangement of the Pumps shall be as per Manufacturer’s data i.e. Spacing

between the Pumps, minimum space between the Pump and Wall etc. Adequate

submergence of the pump shall be provided as per the manufactures

recommendations. The size of wet well shall be sufficient to accommodate one

additional pump in each compartment, in future.

RCC Staircase to be provided in each compartment of wet well from full supply level

of sump. Aluminium ladder (removable) from last landing of staircase to the bottom

of wet well.


77

IS: 3370 and IS: 4111 (Part 4) shall be followed for the design and construction of

Wet Well.

Basis for Design

All underground or partly underground liquid containing structures shall be designed

for the following conditions:

(a) Liquid depth up to full height of wall and free board. No relief due to lateral soil

pressure from outside to be considered;

(b) Reservoir empty (i.e. no liquid or any material inside the storage area): full lateral

earth pressure at rest due to surrounding saturated soil and surcharge pressure as

applicable, shall be considered;

(c) Partition wall between two compartments of wet well to be designed as one

compartment empty and other full;

(d) Structures shall be designed for uplift in empty conditions considering the depth of

the highest water table recorded in the area.

(e) Walls shall be designed under operating conditions to resist earthquake forces

developed due to mobilization of earth and dynamic liquid loads;

Underground or partially underground structures shall also be checked against

stresses developed due to any combination of full and empty compartments with

appropriate ground/uplift pressures on the base slab.

VI. Sewage Pumps

Coarse-screened sewage shall be pumped from wet well. Pump operation shall be

automatically controlled based on wet well level. There will be high level and low

level alarm and tripping system installed. It will house non clog submersible pumps,

which will always be submerged in sewage with minimum submergence as required

by the manufacturer. Pumps will have automatic coupling arrangement at discharge

end, a guide pipe and chain for easy removal and lowering of pumps. Vibration shall

be limited as per BS 4675 Part I:

Type of Pumps : Submersible type non-clog design Liquid : Raw Sewage Specific gravity : 1.05 Solid Passage Size : Maximum 100 mm No of working Pumps : 4 Nos Capacity of Pump : Peak flow/ No of working pumps Standby Pumps : 50% of working pumps. VFD for pump : 2 Pumps one in each compartment is to have the

provision of VFD for flow variation

One electrically operated 3-way movement Trolley (EOT) having capacity equal to 1.5

times the weight of heaviest part to be lifted shall be provided over the sump well for

movement of pumps. The horizontal, transverse as well vertical shall be electrically

operated. The gantry is to be fixed on RCC framed structure and not on a cantilever

arm from columns.


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VII. Rising main

Sewage from wet well will be pumped to STPs (Existing SBR based and new

Proposed STP) through rising main of size suitable to carry peak flow.

Material of rising main : Cement lined DI (K9) pipe

Size of rising main : Capable of carrying peak flow as specified

Velocity in rising main at peak flow : maximum 2.5 m / sec

VIII. Piping & Specials

This shall include providing, laying, cutting, jointing, testing, etc. of pipes along with

specials:

a) RCC Channels from inlet chamber of screens upto sump/ collecting tank.

b) DI K-9 Delivery line for individual pump upto common header.

c) Expander, Sluice valves, Bends, Non Return Valves in the individual delivery

of all the pumps. Tees and Sluice valve in the common header.

d) DI K-9 Common header upto Inlet of STP.

e) The size of pipe shall be calculated so as to meet the following velocity

criteria:-

Minimum Velocity : 0.60 m/sec

Maximum Velocity : 2.5 m/sec

f) All other required fittings such as bends, tees etc.

g) Thrust block of M-20 grade, for pipe support, etc.

h) Necessary bypass arrangement shall be provided to be used during the

shutdown of the plant. Pipe and Valve arrangement upto suitable discharge-

point shall be provided.

IX. Painting, White Washing and allied works

The internal and external surfaces of the walls and ceiling of all building structures

shall be applied with two coats of Birla / JK Wall Putty followed by two coats of

primer followed by min two coats of first quality plastic emulsion paint.

All the structural steel, pipes, specials etc. shall have two coats of Epidec RTC

Primer followed by two coats of epoxy paint.

All the internal walls and base of water retaining structures of MPS shall be provided

with min two coats of coal tar epoxy.

X. Roads & Pathways with proper drainage

Roads and Pathways shall be provided with interlocking paver blocks over 150 mm

thick and 100 mm thick respectively cement concrete of 1:4:8 in stone ballast.

Thickness of paver blocks on roads is 80 mm thick and on pathways the thickness

of paver blocks is 60 mm. Paver blocks shall confirm to specification of code IS

15658 Paver blocks will be ISI Marked.

XI. MPS Panel Room

It shall be RCC framed structure and 3.5 m clear height. It shall house panels of

MPS pumps, screens, sluice gates, valves etc. It shall also house PLC Panels and

HMI screen for display of various parameters of MPS. Preferably the MPS panel


79

room building is to be adjoining to the administrative building of STP so as to have a

better monitoring.

Local Push Button Station (LPBS) shall be provided near each Pump set/ Motor for

emergency stop and start thereof. LPBS shall have Start/Stop push button with

Local/Remote Selector Switch. Each push button shall have 2NO+2NC contact for

interlocking purposes. The stop push button shall be mushroom type with stay put

feature and lockable in pressed position to avoid accidental operation of drive from

MCC, PLC during shutdown.

LPBS shall be suitable for use in outdoor open locations with minimum IP-55 degree

of protection and rain canopy.

6.1.2. Mechanical Works

i) J Type Manual Coarse screens, Manual and Mechanical Coarse Screen, Belt

Conveyor for screens

ii) CI Sluice Gate shall be provided at following locations for flow control

a) Inlet of Receiving Chamber – 1No. b) Upstream of coarse screens of MPS – 3 Nos c) Downstream of coarse screens of MPS – 3 Nos d) RCC Partition Walls of Wet Well – 1 No e) Gates for Distribution chamber – 3 Nos. f) Any other gate as required

iii) Non clog Submersible Centrifugal Pumps sets with motor

iv) Piping works, Dismantling Joint, NRV, Sluice Valve with appurtenance

v) Lifting Arrangement –Monorail with electric horizontal and vertical operation

6.1.3. Electrical, Instrumentation & Control Works

i) HT VCB Panel

ii) Transformer ONAN with on load tap changer

iii) Silent Diesel Generating Set with AMF Panel suitable for average flow plus

other miscellaneous load.

iv) Electrical Panel with

a) Incomer for normal & DG supply & interlocks power analyzer, surge protection device

b) Individual Starter Panels with VFD and soft starters for pumpset c) Automatic Power Factor Control (APFC) Capacitor Panel d) Alarm Annunciation Panel e) Feeder for other loads f) Interface with PLC & SCADA compatibility

v) HT & LT Cable, Instrument & data cable

vi) Cabling system

vii) Earthing & Lightening Protection

viii) Lighting System (Indoor & Outdoor)

ix) Junction Box for cables

x) UPS for PLC

xi) Instrumentation & Control


80

This includes supply, erection, testing and commissioning of various instruments &

control system. Brief details are as under:

S No

Instrument Location Quantity

1. Differential Level sensor / Transmitter

Mechanical Coarse Screens As required

2. Pressure gauge Common discharge header of non-clog sewage pumps/Rising main

1

3. Radar Type level transmitter (non-contact type)

Main Collection Sump ( For level Status & level based control)

2

4. Programmable Logic Controller (PLC)

Panel Room 1

5. Any other Item As per requirement As per

requirement

PLC for MPS shall be as per control philosophy & specification.

PLC shall operate pumps based on pre-set levels of sewage in collection tank and

VFD operation. At mid-level of sewage, number of pumps as per average flow shall

operate, whereas at high level, number of pumps as per peak flow shall operate. At

low level, all pumps shall stop. Provision shall be made to operate all pumps in

rotation. Pumps operation shall be closely co-ordinated with STPs sewage

requirement through STP PLC/SCADA

PLC cum Instrumentation Control Panel shall be provided with 6” HMI to enable

level based operation of pumps and display of level and flow.

Provision shall also be made for display of level and flow in STP, SCADA Room.

Single PLC for MPS and STP is preferred. Contractor is free to provide separate

PLC for MPS.

PLC to have provision for exporting data to external device


81

6.2. Sewage Treatment Plant

i) Flow Measurement

Flow measurement shall be done online using an ultrasonic flow meter on the rising

main of raw sewage pumping station located at STP area.

ii) Inlet Chamber

Inlet Chamber will receive raw sewage from the raw sewage pumping station.

Number of Units : (1) One

Min. Detention period : 30 sec on peak flow

Min free board : 0.5 m

Following provisions shall also to be made as per detailed design.

CI/DI double flanged Puddle Collar

CI/DI double flanged Vertical Pipes

1 no. CI /DI double flanged Sluice Valves

CI/DI Horizontal pipe having length as per Site Requirement.

Minimum 150 mm i/d CI/DI pipes along with sluice valves for scouring purposes.

iii) Screening Chamber

Two mechanical Step/MATT type screens (working) with one manual (standby)

screen are proposed in the screening chamber. Each screen shall be designed for

peak flow.

RCC Platforms minimum 1.2 meter wide with GI railing shall be provided at suitable

level and location to enable operation of the units.

The component / unit shall be designed for following:

Number of Units : 2 Nos. Mechanical Working + 1 No.

Manual Standby each of 50% peak flow

Approach Velocity at Average Flow

(m/sec.)

: 0.3 minimum

Velocity through Screen at Average

Flow (m/sec.)

: 0.6 maximum

Velocity through Screen at Peak Flow

(m/sec.)

: 1.2 maximum

Free board : Min 0.5m on upstream side of the screen

at maximum water level

Minimum Length : 6 m

Mechanical Screens Manual Fine

Screens

1 Balloke 2 1

The entire construction shall be in minimum M-30 grade reinforced cement concrete

and as per IS 3370. RCC Platform/Walkway, minimum 1.20 m wide with G.I Hand

Railing as per specifications shall be provided. RCC Staircase, minimum 1.20 m wide


82

with G.I. Hand Railing as per specifications shall be provided for access from

Finished Ground Level to the top of the Unit & to the Operating Platform/Walkway.

The clear spacing shall be 6 mm for Mechanical Fine Screen and spacing of 10 mm

for Manual Fine Screen. The Mechanical and Manual Screens shall be made of SS

304 flats (3 mm for Mechanical and 10 mm for Manual Screen).

Minimum 3mm thick panels of stainless steel 304 construction shall incorporate 6mm

diameter perforations.

Conveyor Belt and Chute arrangement shall be provided to take the screenings.

Screenings dropped from Chute shall be collected in a wheelbarrow. Manually

operated CI/Aluminum Sluice Gates shall be provided at the upstream and

downstream ends to regulate the flow.

Detailed specifications of mechanical bar screen are given in Mechanical Section.

iv) Mechanical Grit Chamber

Mechanical grit chamber with atleast 50 % and one Manual Bypass Channel

(Standby) shall be provided after Fine Screen Channels. The entire construction shall

be in minimum M-30 grade reinforced cement concrete and as per IS 3370. RCC

Platform/Walkway, minimum 1.20 m wide with G.I. Hand Railing as per specifications

shall be provided. RCC Staircase, minimum 1.20 m wide with G.I. Hand Railing as

per specifications shall be provided for access from Finished Ground Level to the top

of the Unit & to the Operating Platform/Walkway.

Each Grit Chamber shall have the following features:

One tapered Inlet Channel running along one side with adjustable Influent

Deflectors for entry of sewage into the Grit Chamber.

One tapered Outlet Channel for collecting the de-gritted sewage, which overflow

over an adjustable Weir into the Outlet Channel. It shall be designed in such a

way that no settling takes place in it.

One sloping Grit Classifying Channel into which the collected grit shall be

classified.

The grit from Classifier shall be collected in a Wheeled Trolley.

A Grit Scraping Mechanism.

Material of construction of grit mechanism: SS 304

Screw Classifier or Reciprocating Rake Mechanism to remove the grit.

Manually Operated C.I. / Aluminum Sluice Gates shall be provided at entrance of

the Inlet Channel of the Grit Chambers as well as Bypass Channel to regulate the

flow.

No. of Units : Total flow in all working units equal to Peak Flow

Type : Mechanical

Size of grit particle : 0.15 mm and above

Specific gravity of grit : 2.65

Maximum Surface Overflow Rate: 959 m3/m2/day

Free Board : 0.5 m min.

Side Water Depth : 0.90 m min.


83

Wheelbarrow : 3 Nos. minimum

All other accessories, whether specified or not, but required for completion of

Contract shall form the part of Bidder‘s Scope.

Proper bypass channel between the units shall be provided with a sluice gate at the

inlet.

v) Distribution Box/Splitter Box

A Distribution Box / Splitter Box shall be provided downstream of Grit Chambers

prior to Biological Reactors for uniform flow distribution to Biological Reactors. The

Distribution Box shall be equipped with suitable motorized Sluice Gates and outlet

Weirs.

vi) Biological Treatment

The bidder can adopt any suitable, sustainable & proven technology including

SBR & MBR with its variants for biological treatment of sewage.

Anaerobic Reactors

No of Reactors Suitable

Anaerobic Hydraulic Retention Time As per CPHEEO

Min. Liquid Depth of Reactor 5.0 mt.

Min. free board 0.5 mt.

Material of Construction -Civil R.C.C. (M-30) or higher

Mixers Suitable- SS 304 MOC.

Anoxic Reactors

Design Anoxic HRT As per CPHEEO



Min. Liquid Depth of Basin 5.0 mt.



Primary Clarifier

No. of Units Suitable

Surface Loading Rate at Average flow 35-40 m3/m2/day

Weir loading rate at average flow 125 m3/m/day (max.)

Area required per unit Suitable

Side water depth (upto top of weir) 3.0 m (Minimum)


Type of Mechanism Central Driven / Peripheral Type

Drive RPM As per manufacturer standard

MOC/Paint Wetted parts SS 304

Non Wetted Parts- MS/Epoxy Painted

Sludge Drain Valves (KGV)

Location At Sludge Removal pipe line

Size Suitable


84

Type Knife Gate Valves - Automatically

operated

6.3. Biological Reactors, Settling and Decanting System

Primarily treated sewage shall be fed into the Reactors for biological treatment to

remove BOD, COD, Suspended Solids, Biological Nitrogen and Phosphorous.

The Reactors along with provisions for sludge re-circulation, excess sludge disposal,

aeration system, settling, decanting and other operational requirements like

automation, level control, flow control, oxygen level control etc. shall be provided.

Number of Units : As per bidder design

Design parameters : All design parameters like, MLSS, HRT, F/M, DO

level, recirculation ratio etc. shall be as per CPHEEO

manual for the offered technology.

Free Board : Minimum 0.50 m

Aeration System : As per bidder design subject to CPHEEO guidelines.

Automation : Operation of the Reactors shall be fully automatic,

controlled through PLC.

Miscellaneous

requirements

: The treated waste water shall be available on

continuous basis.

The Reactors to treat design flow sewage

irrespective of flow variation pattern of inflow

sewage.

Any other

requirement

: As per bidder technology and design to meet the

desired outlet parameters.

Secondary Clarifier


Surface Loading Rate at peak flow 40-45 m3/m2/day for activated sludge

25-30 m3/m2/day for extended aeration

sludge

Weir loading rate at average flow 185 m3

/m/day (max.)

Solids loading rate at peak flow 210 kg/m2

/day for activated sludge

170 kg/m2

/day for extended aeration

sludge


Side water depth (upto top weir) 3.0 m (Minimum)



Drive RPM As per manufacturer’s standard

MOC/Paint MS/Epoxy Painted- Wetted parts SS 304

Sludge Drain Valves (KGV) of Secondary Clarifier


Size Suitable


operated


85

Return and Excess Sludge Sump with Pump House

Return Sludge Pumps

No. of Return Sludge Pump suitable

Capacity of Return Sludge Pump suitable

Type of Pump Submersible Non-clog / Horizontal

Centrifugal Non-clog type

Pump Head As per hydraulic design

Valves at delivery, Suction and

common header lines

Knife Gate Valves - Electrically operated

Excess Sludge Pumps

No. of Excess Sludge Pumps suitable

Capacity and head of Excess Sludge

Pumps

suitable




with G.I Hand Railing as per specifications shall be provided for access from Finished

Ground Level to the top of the Unit & to the Operating Platform/Walkway. Plinth

protection along periphery shall be provided as per technical specifications

6.3.1. Return Sludge and Excess Sludge Pumps

a. Return Sludge Pumps

Capacity and Head As per requirements

Type Submersible / Horizontal Centrifugal

Liquid Biological Sludge of 0.8 – 1% solids consistency

Specific Gravity 1.05

Solid size 40 mm (Maximum)

Temperature Min. 25 C

Efficiency more than 60%

Quantity 1 No. per Basin + 1 No. Store Standby

b. Excess Sludge Pumps









6.3.2. Decanting Device

The Decanter Device shall be Moving Weir Arm Device of SS304 with top mounted

Gear Box, Electric Drive, Scum Guard, Down comers, Collection Pipe, Bearings.

Weir loading for each decanter shall not exceed 125 m3/hr/m of the inlet weir.


86

6.4. Aeration System for Selected Biological Treatment

Oxygen Required

BOD Oxidation Oxygen Requirement 1.2 x Inlet BOD Load

Nitrification Oxygen Requirement 4.56 x TKN Nitrification

Total Requirement BOD Oxidation + Nitrification Oxygen

Requirement

Oxygen Credit (from De-Nitrification)

Oxygen release during denitrification

= 2.86 mg O2/mgN

Max O2 credit of denitrification can be

only 50% of nitrification

Alpha value for Submerged Diffuser 0.65 (Maximum)

Beta value for Submerged Diffuser 0.95 (Maximum)

Fouling Factor for Diffuser 0.9

Oxygen Demand Safety Factor 5 %

Oxygen content in Air (by weight) 23%

Type of aeration Energy efficient diffused aeration

system.

Blower details:-

Type : Turbo Blowers

Capacity : As per design

Discharge Head : Suitable

No. of units : As per design requirement with minimum 50% standby

All Air Blower shall be provided with VFD.

The operation of Aeration System shall include PLC based control. The

operation and speed of Air Blowers shall be automatically adjusted using

parameters like Oxygen required, Dissolved Oxygen, Temperature and Liquid

Level in the Rector such that the DO is supplied as per demand and power

utilisation for operation of Air Blowers is optimised.

The main Air Header/Ring Main shall be in MS as per relevant IS Code, painted

with corrosion resistant paint as per Manufacture’s recommendations. The Air

Header/Ring Main shall be supported on saddles at suitable intervals or shall

be protected against external corrosion in case laid below ground. The Sub-

headers distributing air to various locations shall have Auto Valves to facilitate

air switch over between different demand locations. The Sub-header shall

supply air to Fixed Type Diffuser Grids at various locations through vertical Air

Supply Pipes. These Air Supply Pipes above water level shall be in MS,

painted with corrosion resistant paint and below water shall be in SS 304. All

under water Lateral Pipes shall be of UPVC. Junctions between horizontal Sub-

header and vertical Air Supply Pipes shall be suitably protected against

corrosion due to dissimilar materials.

All other accessories, whether specified or not, but required for completeness

shall form part of bidder scope.

The aeration facility shall be installed for average flow.


87

Fine Bubble Type, PU / EPDM Membrane Diffusers shall be acceptable with

minimum Membrane Diffusers to Floor Coverage Area of 5%. Diffusers shall be

submerged, fine bubble / fine pore, high transfer efficiency, low maintenance

and non-buoyant type. Diffusers shall be panel / Disc / tubular type. Complete

Diffuser as a unit shall be assembled at the manufacturing factory level. The

grid supports shall of adjustable type made of SS 304.

6.5. Tertiary Filtration System: Fiber Disc filter

Tertiary Treatment Plant shall be designed for average flow and provided in the form

of Disc filters which shall consists of following:

• Civil (RCC) Tank to house the Fiber Disc filter

• Disc filter assembly with Filter Cloth

• Drive Assembly

• Backwash System

• Control panel & Instruments

The Tertiary Treatment Plant shall conform to the specifications as mentioned below:

Disc filter assembly with Filter Cloth:

Disc filter shall comprise multiple high strength and separable discs (proposed by

manufacturer). Each Disc shall be subdivided into smaller sections to constitute a

prefab disc frame (module) so as to ensure easy replacement and maintenance.

Each disc consists of multiple panels.In case of replacement of fiber cloth, the left and

right of the fiber cloth shall be replaced quickly without disassembling of segments

(Disc frames). Each disc shall be mounted on the centre drum by strap band (steel

band) for the exact roundness and it shall not be fixed by Stud bolts. The additional

sealing material shall not be needed for assembling of filter cloth to segment and the

fiber cloth itself shall be acted as the sealing material. Filter cloth shall envelop some

parts of backside of filter frame and the several springs shall be used to fix the filter

cloth. The drum shall be round type and shall have the enough area in order to

discharge the treated water without trouble. The material of the filter cloth shall be

polyester; the filter frame that fixes the filter cloth, the disc frame and the segment

cover shall be ABS resin. Central drum shall be SS304. Maximum Filtration rate shall

be 10-12 m3/m2/hr. Nominal pore size of filter cloth shall be approx. 10 micron.

Filter shall be designed for average flow or decant flow whichever is higher. Suitable

no. of units shall be provided. Raw water shall flow into the respective Disc filter by

gravity. The structure shall ensure that Suspended Solids (SS) are filtered (treated)

from outside to inside of the filter cloth installed on both sides of the disc filter, and

that filtered water is discharged through the centre drum to the treated waterway.

Sr

No TECHNICAL DATA OF FILTER

1. Type of Disc filter Fully submerged outside to inside

type

2. Type of filter cloth Pile cloth with ABS frame


88

3. MOC of filter cloth Polyester

4. Nominal pore size, (microns) Approx. 10

5. Maximum Filtration rate (m3/m2/hr) 10 -12

6. Total reject and backwash % < 3

7. Backwash System Automatic Backwash system

based on time and level

8. Head loss across the disc filter unit

(mm) As per design

9. Thickness of drum 4 mm. (minimum)

10. MOC of Centre drum SS 304

11. Filtration mode Continuous

Drive Assembly:

Drive part of Disc filter shall be of Worm geared type with motor chain drive. The drive

comprises Drive Motor, Reduction Gears, Chain and Sprocket. Power shall be

transmitted by the SS 304 chain. A protective cover made of SS 304 shall be equipped

for the drive motor, reduction gear and the chain. The rpm of the disc filter drive shall

be adjustable by the inverter that is attached in the field control panel.

Backwash system

Cleaning device consists of Suction cleaning unit, which conducts the suction cleaning

in the each side of disc, the automatic valve and the suction cleaning pump. Cleaning

device shall clean the contaminated filter cloth thoroughly by the suction unit on both

sides of disc with automatic valve and suction cleaning pump which shall be activated

by the water level switch that contacts the water level raised with the increase of the

loss of head. Disc filter should be operated for filtration without the stop during

backwash and suction of sludge. Suction cleaning unit shall be made of or the even

cleaning efficiency without dead zone for all area of filter cloth.

Back wash Recovery system shall consist of flash mixer, Flocculator, Clarifier, Back

wash sludge sump. Sludge generated shall be dewatered using centrifuge. Overflow

from Clarifier shall be sent to FDF.

6.6. Disinfection System

Disinfection (Chlorination) Units

Disinfection (Chlorination) Units including Chlorination Tank and Chlorinator cum

Chlorine Tonner House shall be designed for Average Flow or Decant Flow whichever

is higher.

6.6.1. Chlorination Tank and Chlorinator cum Chlorine Tonner House

Treated sewage shall be taken to Chlorination Tank by RCC Channel/DI K-9 pipe. Gas

Chlorine shall be added for disinfection at suitable dosing rate. Baffle walls shall be

provided in the Tank to facilitate hydraulic mixing of treated sewage. The entire

construction shall be in minimum M-30 grade reinforced cement concrete and as per IS

3370.

Design Flow : Maximum Decant Flow

Number of Units : 1 No.


89

Hydraulic Retention Time : 30 Minutes (excluding Outlet Channel after Weir)


A Chlorinator cum Chlorine Tonner House shall be provided above/near Chlorination

Tank to house Chlorination Systems. It shall be RCC (M25) Frame cum Brick Masonry

Structure with Rolling Shutter, Windows & Ventilators, Electrical Hoist with Electrical

Travelling Trolley of minimum 3 Ton capacity or 1.5 times the weight of the single Unit

whichever is more to lift the Pumps/Chlorine Tonners and Safety Equipment including

Sand Buckets, Fire Extinguishers and Fire Alarms etc. Also it shall be provided with

IPS Flooring, Internal & External Plaster and Internal & External Painting. Plinth

Protection shall be provided along the periphery as per specifications.

All other accessories, whether specified or not, but required for completion of Contract

shall form the part of Bidder’s Scope.

6.6.2. Chlorination System

Gas Chlorination System comprising Vacuum Chlorinators (2 Nos.), Water Feed

Pumps (2 Nos.), Interconnecting Piping and Appurtenances, Chlorine Gas Detector,

Empty Chlorine Tonners (Suitable for 30 days’ Storage) with Tri unions, Lifting Device

and Suspended Weighing Scale, Residual Chlorine Test Kit, Safety Equipment (e.g.

Exhaust Fan, Canisters, Gasmasks etc.), Mandatory Spares, Chlorine Leak Detection

and Chlorine Leak Absorption System including FRP Half Hoods, Caustic Solution

Tank, Caustic Recirculation Pump, Centrifugal Fan, Interconnecting Piping and Ducts

complete and other required ancillary shall be provided.

The system must have the provision for linking its operation to PLC of STP so that

quantity of chlorine usage can be varied automatically as per treated water flow from

SBR Basins.

Design Flow : Maximum Decant Flow

Type : Vacuum Type

Chlorine Dosing : As per process requirement subject to Infrastructure

arrangement for at least 5 ppm dose.

Quantity of Chlorinator : 2 Nos. (1 Working + 1 Standby)


Contract shall form the part of Bidder’s Scope.

Treated water after chlorination unit shall be disposed off in Buddha Nallah through

RCC pipe.

6.7. Sludge Handling System

6.7.1. Sludge withdrawal from various units.

Sludge withdrawal shall be either by gravity or through pumping. DI Pipes shall be

preferably used for transportation of sludge. Sludge withdrawn from various units shall

be collected in a single sludge sump and shall be fed to :

a. Gravity Thickener followed by Centrifuge dewatering machine or

b. Combined Mechanical Thickener cum Belt Press.


90

6.7.2. Sludge Sump

Sludge sump shall be provided to collect the excess sludge from various units. There

shall be one common Sludge Sump. The Sump shall be equipped with coarse Bubble

Air Grid made from stainless steel pipes to facilitate mixing of contents of sludge sump

on continuous basis. Alternatively Submersible mixers of suitable numbers can be

provided:

Number of Units : 1 (one) no.

Free Board : 0.5 m

Capacity : Minimum 6 hour holding of average daily

sludge production

Minimum SWD : 3.0 m

6.7.3. Sludge thickener unit with Centrifuge

The Gravity RCC Sludge thickener unit(s) of suitable size shall be provided for gravity

sludge thickening to reduce the capacity of Centrifuge equipment. The excess sludge

from biological Reactors / settling tanks will be taken to thickener. Thickener is

expected to produce thickened sludge with minimum dry solid concentration of 3%.

Design criteria

1. Hydraulic loading As per CPHEEO Manual

2. Solid loading As per CPHEEO Manual

Continuous gravity thickener shall be

circular RCC units with minimum 3.0

m side water depth. Side depth shall

be based on three considerations.

Free board 600 mm

Sludge Thickener Mechanism The mechanism shall comprise of the following main components of suitable size as per design requirements: All wetted parts shall be SS 304.

Bridge Superstructure spanning the tank diameter with central drive maintenance platform

Drive assembly complete with drive head, chain and sprocket, geared motor etc. Feed Well Center Shaft Cone scraper Rake arms Tie rods for rake arms Plow blades & squeegees

Material of Construction Tank RCC Bridge MSEP Feed Well SS 304 Walkway MS Chequered Plate / Grating Handrail 40 mm i/d GI pipe, Class B Rake Arm SS 304 Vertical shaft SS 304

Blades SS 304


91

v-notch weir FRP / SS 304 Squeegees Neoprene Anchor Bolt SS 304 Fasteners- Under Water SS 304 Fasteners- Above Water GI / SS 304

Sludge dewatering mechanism can be centrifuge type or belt filter press type of suitable design and capacity.

6.7.4. Sludge Pumps

Sludge Transfer Pumps shall be provided to feed sludge to sludge dewatering units. The pump shall be suitable for handling biological sludge. All pumps including standby shall be installed.

Pumps Capacity and Head : Sufficient for handling total daily sludge in working hours i.e. max 22 hours

Type : Screw Pump/ Reciprocating pump Liquid : Bio-sludge for thickener and dewatering

machine. Solid Size handling : 40 mm (Maximum) Specific Gravity : 1.05 Efficiency : More than 50 % Installation : Fixed Quantity : Minimum 2 no. (1W + 1S) for dewatering

mechanism feeding Minimum 2 no. (1W + 1S) for thickener feed

6.7.5. Centrifuge Units

The centrifuge shall be solid bowl centrifuge of co-current / counter current design.

The centrifuge shall have sufficient clarifying length and differential RPM so that

separation of solids is effective. The centrifuge shall have central lubrication system.

The centrifuge and its accessories shall be mounted on a common base frame so that

entire assembly can be installed on an elevated structure.

Suitable drive with V-belt arrangement and turbo-coupling shall be provided along

with overload protection device. Centrifuge shall be with SS-304 wetted parts.

Differential speed and bowl speed should be adjusted by changing the pulleys;

differential speed may be adjustable by use of epicyclical-gear. The bowl shall be

protected with flexible connections so that vibrations are not transmitted to other

equipment. The base frame shall be in epoxy painted steel construction and provided

with anti-vibration pads. All steps necessary to prevent transmission of structure

borne noise shall be taken. Adequate sound proofing shall be carried out.

A hoist shall be provided above centrifuge for maintenance purpose. The hoist shall

be such that it shall be possible to erect or de-erect the centrifuge while one

centrifuge is in operation.

Number of centrifuges : At least 2 Nos. (1W + 1 SB) Type : Horizontal Operating Hours : 22 hrs. per day maximum Mixing arrangement of Polyelectrolyte : Online mixing


92

and sludge Dewatering polyelectrolyte dosing system is to be provided to dose poly electrolyte

solution to the incoming sludge at entrance to the centrifuge.

6.7.6. Combined Belt Thickener cum Belt filter press units

The Sludge Dewatering Device shall consist of combo units which includes

Mechanical Thickener and Belt Filter Press along with all appurtenances. It shall be

designed to adequately condition and dewater the sludge so that the dewatered

sludge cake is produced that easily discharges from the Belt Filter Press to collection

trolley. Flocculator arrangement in SS-304 of suitable capacity shall be provided at

the inlet of each Belt Filter Press for mixing of sludge and DWPE. All other

accessories, whether specified or not, but required for complete operation shall form

part of contractors scope.

Number of Belt filter press : Min 2 Nos (1 W + 1 SB)

Operating Hour : 22 hours per day maximum

Design

Inlet Sludge Consistency : 0.8-1.0 %

Outlet sludge consistency : Minimum 20%

Mixing arrangement of

Polyelectrolyte and sludge

: Online-mixing

Dewatering polyelectrolyte Dosing system is to be provided to dose Poly Electrolyte

solution to the incoming sludge at entrance to the belt filter press. The supernatant

from Belt Filter shall be taken by gravity to Wet Well of MPS/Inlet of STP. The pipes

below Ground shall be RCC NP-3, with HDPE lining, whereas the pipes above

ground shall be of SS-304. Combo unit including Mechanical Thickener and Belt filter

press shall be capable of handling sludge consisting of minimum 0.8% solids by

weight. The dewatered cake shall be based on minimum consistency of 20% by

weight dry solids. MOC shall be SS-304. General Equipment furnished and installed

under this section shall be fabricated, assembled, erected and placed in proper

operating condition in full conformity with the drawings, specifications, engineering

data, instructions, and recommendations of the equipment manufacturer, unless the

engineer notes exceptions.

Workmanship and design: All components of the sludge dewatering equipment

shall be engineered for long, continuous, and uninterrupted service. The unit shall be

fully enclosed “multi-stage” type comprised with three belts. Gravity section shall be

comprised with an individual speed variable gear motor. All bearings, electrical and

pneumatic components shall be located on periphery of the frame allowing easy

access for the operator for overhauls. Sufficient number of removable inspection

hatches shall be located on each side of the unit to observe the factions of the unit.

The sludge dewatering system shall consist of belt filter press (es) and all

appurtenances. Each belt filter press shall be a fully enclosed having monologue

frame construction, complete prefabricated unit consisting of at least a sludge

conditioning system, a gravity drainage section, a pressure section, a belt alignment

and tensioning system and a belt washing system. Only units having an effective belt


93

width of 1.0– 3.0 meter shall be considered acceptable under this specification. The

unit(s) shall be the “multi-stage” Belt Filter Press (es) type.

6.8. Manual and Auto Valves / Gates

The bidder shall have to provide required No. of valves operated manually as well as with automation for running of plant.

6.8.1. Chain Pulley Block, Mono Rail, Electric Hoists

Mono Rails

This includes supply, erection, testing and commissioning of adequate capacity mono rails.

Lifting electric hoist arrangement for various unit of STP

This includes supply, erection, testing and commissioning of lifting equipment with all accessories suitable in various units of the STP.

Sr. No.

Description of unit

Type of lifting Type of movements

1. Dewatering mechanism

Electric operated hoist

Two movements e.g. vertical, and Transverse

2. Sludge Pump House


A chain pulley block of adequate capacity

3. Tonner shed Electric operated hoist

Two-way movements e.g. vertical, Transverse

4. Raw Sewage Pumping Station


Three-way movements e.g. vertical, longitudinal and transverse

The above list is indicative. Actual required / Installation capacity of Electric Hoist, shall vary as per process requirement, which shall be approved by EIC.

Chain Pulley Blocks This includes supply, erection, testing and commissioning of adequate capacity

chain pulley block with all the accessories. It should be compatible with the lifting

chain of the pump.

Chain Pulley Block of adequate Capacity : As per requirement

6.8.2. Sludge Pump House(s)

Pump house shall be near sludge sump. This shall be RCC frame and brick masonry

structure. Minimum height of the pump house shall be 4 m from the plinth level. It shall

be provided with rolling shutter and doors and windows. A chain pulley block of

adequate capacity along with girder and pillar arrangement shall be provided.

The pump house shall be painted from inside and outside with approved colour and

make as directed by Engineer-in-Charge. The pump house shall house-

Pumps for feed to dewatering mechanism (working + standby)

Air blowers for Sludge Sump (working + standby) or Submersible Mixers

DWPE dosing pumps (working + standby)


94

6.8.3. Chemical Dosing Tanks

Suitable number and capacity dosing tanks with required inner lining and agitators are

to be provided.

Polyelectrolyte Dosing System shall consist of Dosing Tanks equipped with Slow

Speed Agitators and Diaphragm type Metering Pumps. Polyelectrolyte shall be dosed

online at the inlet of Centrifuges. Minimum dosage of polyelectrolyte shall be 0.50 –

1.50 Kg/Ton of dry solids at 0.1% solution strength. The solution will be dosed using

mechanically actuated Diaphragm type Metering Pumps. Dedicated Dosing Pumps

shall be provided and shall be interlocked with Combined Mechanical Thickener cum

Belt Press /Centrifuge in such a way that they Start/Stop along with Belt Press /

Centrifuge.

Dosing Tanks:

Design Capacity : As per requirement

Number of Units : As per requirement

Hydraulic Retention Time : Suitable for min. 8 hours of Operation

Free Board : 500 mm

Dosing Pumps : As per design.

Capacity and Head : As per requirement

Type : Mechanically Actuated Diaphragm Type Metering

Pump

Liquid : Polyelectrolyte Solution of 0.1%Strength

Quantity : one each per dewatering machine

6.8.4. Civil Structure for Mechanical De-watering including

Building of sufficient size to accommodate mechanical dewatering Units Combined

Mechanical Thickener cum Belt Press or Centrifuges (Working + Standby) shall be

constructed with sufficient floor height above Ground Level to park sludge collection

vehicle directly under the sludge discharge line of centrifuge. The room shall have a

RCC roof at a height suitable for installing EOT. Minimum floor area of the building

shall be sufficient to accommodate mechanical dewatering unit. It should be framed

RCC structure with the top roof also in RCC. The dewatered sludge shall have a

minimum solids concentration of 20% or more (measured as dry solids w/w basis) so

that it can disposed by open body Trucks/Trolleys.

6.8.5. Sludge Storage Platform

A sludge storage platform shall be provided at a suitable location within the plant area

for storage of de-watered sludge, minimum for a 7 days storage capacity. Flooring of

the platform shall be 75 mm thick PCC (1:2:4) laid over 100 mm thick stone ballast.

Level of platform shall be at least 20 cm above the level of approach road. From

sludge storage platform, the sludge shall be disposed of by the contractor.

6.8 Operations Buildings

6.8.1 Office, PLC Room etc.

The building shall be constructed to house the following as a minimum:

a) PLC/Main LT (MCC) Room –as required

b) Office rooms for the officers and staff with Lavatory cum Toilet block of required


95

size/area along with sanitary fittings as decided by the Engineer –in- Charge.

i) One passage app. 2m wide.

ii) Workshop cum Tool Room

iii) Stair case up to terrace will be provided.

The height of ceiling shall be minimum 3.5 M from the floor level or higher to suit the

requirement. Adequate no. of toilets and wash basin shall be provided separately for

men and women and a separate toilet attached to the office room shall be provided. A

covered service water overhead tank of capacity 5 cum shall be provided to cater to the

water requirement of building and process requirement.

One no. bore well with pumps of capacity 10-15 cum per hour to cater to the water

requirement for building etc.

Office Building/Admin Building Rooms

The Existing Administrative Block & laboratory for UASB based Sewage Treatment

Plant may be used after renovation/repair & painting.

6.8.2 Blower Room

Sufficient area blower room with a minimum clear height of 5.00 mtr shall be

constructed to accommodate all the blowers for biological Reactors and other

requirements. Minimum space on other three sides of blower room will be 1.5 m from

the blowers. The blower room shall have sufficient ventilation, lighting and working

space. Control panels for air blower shall be placed in air conditioned room, in blower

room, if required. The room will be equipped with sufficient capacity EOT lifting

arrangement to facilitate removal of blower/motor etc. for repairs. The room will also

have rolling shutter or aluminium glazed doors and windows.

6.8.3 Staff Quarters

The bidder shall have to construct two Nos. Single storey quarters for the operational

staff. The covered area shall have 80 m2 each. The provision in the staff quarter

consists of one bedroom, one drawing cum dinning, kitchen, store and toilet. The

construction material for walls shall be brick work in Cement Sand mortar 1:5, RCC

roof slab shall be (M 25). The door and windows shall be of commercial hollock wood.

6.8.4 Other Buildings

One toilet block for operators, one guard room with toilet and one meter room of

sufficient size as approved by Engineer-in-Charge shall be constructed.

6.8.5 The Painting specifications common to all the buildings

Sr.No Description Specifications

1 Roof Water Proofing Brick Bat Coba

2 Plaster

i Walls inside Cement Mortar 1:4, 20 mm thick

ii Walls outside Cement Mortar 1:4, 12.5 mm thick

iii Roof including cantilevers Cement Mortar 1:3, 10 mm thick

3 Painting


96

i External Cement based paint

ii Internal Plastic emulsion

4 Dado/ Skirting Same material as on flooring 2.10 m high

in toilet block and 0.15 m high in all other

rooms / spaces

5 Doors / windows Aluminum

6.8.6 Schedule of Finishes

Sr.

No.

Unit Flooring Doors Windows /

Ventilators

1 MCC Room, PLC &

Control Room

Marbonite flooring of

approved make. The

size of Marbonite tiles

shall be min 600 mm

x 600 mm & thickness

minimum 12 mm

Solid Core

Flush Door

with heavy

duty Brass

Fittings of

approved

make

Aluminum of

approved

make

2 Reactor Air Blower

Room, Workshop &

Tool Room, Chlorinator

cum Chlorine Tonner

House, Thickener

Dilution Water Pump

Houses, Electrical HT

Substation, DG House

IPS Flooring with

Abrasion Resistant

Additives of approved

make

MS Rolling

Shutter

of

approved

make

Aluminum of

approved

make

3 Centrifuge / Thickener

cum Belt Press House

Anti -Skid Tile

Flooring of approved

make

--- ---

4 Vehicle Parking Area Coloured Pre-cast

Heavy Duty Paving

Blocks with Lacquer

Finish

--- ---

5 Toilet Blocks Coloured Glazed Tiles UPVC of

approved

make

UPVC of

approved make

6 Staircase: Inside

Building

Grey Granite Flooring

of approved make

--- ---

Adequate number of Toilets and Washbasins shall be provided separately for Men &

Women at each floor. A covered Overhead Tank of capacity 5 m3 shall be provided

along with an Underground Water Tank of capacity minimum 10 m3 to cater to the water

requirements of the Building.

In addition, the Building shall be provided with Passages, Wooden/Aluminium/Glass

Doors / Windows / Ventilators and Safety Equipment including Sand Buckets, Fire


97

Extinguishers and Fire Alarms etc. Adequate Flooring shall be provided in various

Rooms/Areas as per requirement or as per instructions of the Engineer-in-charge. Internal

& External Plaster with Painting shall be done as per instructions of the Engineer-in-

charge. Plinth Protection shall be provided along the periphery as per specifications.

The Building shall be provided with the following:

6.9 SUB STATION (HT METER ROOM, HT PANEL ROOM, TRANSFOMER, PCC &

MCC PANEL ROOM)

Two nos. Transformers, 1 each for STP and Pumping Station of full capacity and as

per PSPCL norms shall be provided at STP area.

The Electrical Substation shall be provided to accommodate components comprising

HT Panel, Outdoor Transformers, Power Control Centres etc. Outdoor Transformers

shall be installed in open adjacent to Sub-Station building covered with fence and gate

with fire wall between two transformers as per IE rules and PSPCL norms. Location of

HT Meter Room shall be as per PSPCL norms.

Sub-Station building shall be RCC (M25) Frame and Brick Masonry Structure equipped

with Rolling Shutters, Windows/Ventilators, Exhaust Fans and Safety Equipment

including Sand Buckets, Fire Extinguishers and Fire Alarms etc. complete as per

PSPCL norms and IE rules. Also it shall be provided with IPS Flooring, Internal and

External Plaster with Painting and Plinth Protection along the periphery as per

specifications.

DG Set Area

The DG Set area with shed, foundation for DG, Safety Equipment including Sand

Buckets and Fire Extinguishers shall be provided adjacent to Sub-Station building to

accommodate DG Set including AMF Panel, Fuel Tank and other Accessories. DG Set

shall cater to entire load of STP and average flow plus other misc. load of MPS.

Separate DG Set shall be provided for STP and MPS.

Sr.

No.

Item of work Work

1 Personal Computer in

PLC/Control Room

2 Nos. of latest version & configuration complete.

2 Printer in PLC/Control

Room

1 No. of A3 Size Laser colour Printer of latest

version & configuration complete.

3 Telecommunication

Facility

Min. 1 No Telephone Line with a Broad Band

facility. The chargers will be borne by the

Contractor up to the O & M Period.

4 Plant Model 1 No. Wall Mounted Process Model ( Display

Model) with Flow Diagram (Minimum size 3 m

x 1.5m)

1 No. 3D Model with display of flow direction

and lighting.

5 Air Conditioner Adequate nos. of Air conditioners shall be provided

as directed by Executive Engineer.


98

6.10 Process piping / drain piping/ channels

This shall include inter connecting pipelines / channels between different units of

STP and fulfillment of contract limits.

All pipe networks shall be designed for peak flow.

Combination of pipes and channels can be used for conveyance of waste water

as per requirement of site conditions.

The sizes of pipes shall be calculated to meet following criteria:

Piping: Guide Line for Velocity

Notwithstanding the above, the Tenderer shall submit a Pipe Line Schedule with Tag

No., Flow, Size, Type, Material of Construction etc. with detailed P & ID for approval

of the Engineer-in-charge prior to any further engineering or procurement/fabrication

and installation.

Generally, the Material of Construction shall be selected based on the following

guide lines. The Tenderer can make suitable selection depending on Service, Type

of Flow (i.e. Gravity or Pressurized) and Diameter of Pipe.

Piping: Guide Lines for MOC

Sr. No.

Service Design Velocity m/s

Limitations

1 Gravity Lines for Sewage & Water

0.6 – 1.2 Designed as pipe line flowing full.

2 Pressure Lines for Sewage & Water

0.6 – 1.5

3 Air (Pressurized Lines) 12 – 18

4 Scum & Sludge Lines 0.6 – 1.5 Irrespective of flow, Diameter shall not be less than 150 mm for Gravity Lines.

5 Chemical Feed Lines 0.6 – 1.5 Irrespective of flow, Diameter shall not be less than 20 mm.

Sr.

No.

Service Type of Flow MOC

1 Waste Water / Sludge Gravity RCC NP-3 Class with HDPE lining

/ DI-K9 2 Waste Water / Sludge Pressurized CI / DI K-9

3 Service Water Gravity /

Pressurized

Inside Room – CPVC /MDPE / GI

Outside Room – DI for 80mm &

above/ GI for lower sizes.


99

Valve: Guide Line

Sr.

No.

Service Type MOC End

Connection

A Sewage / Sludge

1

Gravity /

Pressurized

Knife Gate CI Body & SS 304

Gate & SS 410

Spindle

Flanged

2 Delivery of Pump Swing Check CS Body & SS 304

Internals

Wafer

3

Suction & Delivery of

Pump


Gate & SS 410

Spindle

Flanged

B Service Water

1 Gravity /

Pressurized

Ball CS Body & SS 304

Internals

Flanged


Internals

Wafer

3 Suction & Delivery of

Pump

Butterfly CI Body & SS 304

Internals

Flanged

C Air

1 Pressurized Ball CS Body & SS 304

Internals

Flanged

2 Delivery of Blower Swing Check CS Body & SS 304

Internals

Wafer


Blower


Internals

Flanged

D Chemicals

1 (a) Gravity /

Pressurized

Ball As per Chemical

CompatibilityChart

Flanged

1 (b) Gravity /

Pressurized

Diaphragm As per Chemical

CompatibilityChart

Flanged

4

Air Lines: Headers,

Vertical Down-comers

Pressurized Above Water: MS "C" Class, Sand Blasted and Epoxy Painted

Under Water: SS 304

Under Ground : MS with Coating

and Wrapping

In Blower Room: Pipe Insulation

with Resin Bonded Glass wool in

Rigid Board. Kindly refer detail

Mechanical specifications.

5 (a) Air Grid Piping: Aeration

Zone

Pressurized UPVC Schedule 40

5 (b) Air Grid Piping:

Selector Zone

Pressurized SS 304

6 Chemicals Gravity /

Pressurized

SS 304 except Chlorine & FeCl3

7 Chlorine & FeCl3 Gravity /

Pressurized

Schedule 40 UPVC


100

Sr.

No.


Connection

1 (c) Gravity /

Pressurized

Plug As per Chemical

Compatibility Chart

Flanged

Notwithstanding the above, the Tenderer shall submit a Valve Schedule with Tag No.,

Flow, Size, Type, Material of Construction, End Connection etc. with detailed P &ID

for approval prior to any further engineering or procurement/fabrication and

installation.

6.11 Security Cabins

Security Cabin with toilet of size 3.00 m x 3.00 m shall be provided at entry Gate of the

Plant. It shall be RCC (M25) Frame and Brick Masonry Structure equipped with Doors,

Windows/Ventilators, etc. complete. Also, it shall be provided with Flooring, Internal and

External Plaster with Painting and Plinth Protection along the periphery as per

specifications.

6.12 Site Development

Site development of whole land should be done by the bidder maintaining plinth level

around structures, top level of roads/pavements, lawns, landscaping etc. Lawns should

be 15 cm below top level of roads and pavements.

6.12.1 Roads & Pavement

Roads and pavement shall be proposed by the contractor, so as to access each and

every unit of the constructed works. These roads and footpaths shall be 4.2 m and 2.2m

wide respectively. The roads/pavements shall be made of paver blocks. Cement

Concrete Kerb & Channel (1:2:4) shall be provided on both sides of the road. The Kerb

& Channel shall be 30 cm x 60 cm x 10 cm. Dowel shall be provided on both side of the

road with earth filling in proper slope and compaction as per direction of Engineer-in-

Charge.

6.12.2 Sewerage System, Drainage System and Storm Water System

The waste water collected through down take pipes of grit chamber / screen channel,

inlet chamber and other units shall be carried through RCC Pipe / UPVC Pipe upto inlet

chamber of STP/MPS. This may require provision of pumping arrangement.

In addition to this the waste water of operation building shall also be carried to this

sewerage system. Provision shall be made for collection of sludge filtrate from sludge

platform and mechanical dewatering for its connection to proposed sewerage system.

The required no. of manholes shall be constructed as per drawing submitted by the

bidder and approved by Engineer-in-Charge before execution of the work. The bedding

and haunches of pipes shall be as per the specifications approved by the Engineer-in-

Charge.

The bidder shall also provide suitable arrangement for disposal of storm water of the

plant area.

6.12.3 Water Supply Arrangement

The bidder shall provide internal water supply scheme in the plant area. The main water

supply lines shall be of suitable size and of Ductile Iron (K-7) Pipe. However, service


101

connection to buildings / equipment / process units will be of MDPE/CPVC/ G.I. Class B.

The supply of water shall be made through small tube-well to be bored within the plant

area. The bidder shall have to provide complete water supply system including

underground water storage tank of suitable capacity (subject to minimum of 20 Cum)

and overhead tanks wherever required. The water supply system shall include making

provision of hydrants / nozzles for washing of the various units / pipelines. A booster

pump of suitable capacity shall be provided for pumping the water to above said units.

Provision for all required pipes, specials, overflow pipes and bell cock sluice valves shall

also be included.

a) Small Tube well: It shall consist of a bore of suitable size and depth with PVC casing pipe

/ filter housing a submersible pump set of suitable capacity complete in all respect for

pumping out water to meet the requirement of plant operation, watering of plants, cleaning

and staff requirement for daily use. Water should be suitable for construction and drinking

purposes.

6.12.4 Rain water harvesting

Roof top rain water harvesting is to be done for all the buildings. The system shall

confirm to the details and specifications in the relevant document published by Central

Ground Water Board, Ministry of Water Resources to be stipulated. The following

technical criteria, to be taken into consideration while designing rain water harvesting

system.

Hydrogeology of the area, nature and aerial extent of the acquifers

Nature and type of soil cover

Quantity and intensity of rainfall specially one hour peak rainfall

Clogging potential i.e. silt content of source water

Topography / applicable methods (infection or infiltration)

All recharge structures shall be designed based on availability of space, run off, depth of

water table and lithology of the area.

General methods to be adopted are described below:

Rain water from roof of building should be collected at one or more places through rain

water drain pipes extended up to the bottom of the building. Then collected water should

be diverted into a sump called filter chamber of required size and from sump to

recharging pits or other components through RCC pipe of required size and thickness /

strength. The bottom half of the filter chamber has to be filled with broken bricks /

pebbles and followed by a layer of coarse sand. A nylon mesh has to be provided in

between the two layers. The top portion of filter chamber should be covered with RCC

slab. The inlet rain water drain pipe should be on the top of the filter chamber and outlet

pipe connecting the filter chamber to the recharging structure should be at the bottom.

One filter chamber should not be connected to more than 22 square meter area of roof

of any building. The rain water then should be diverted towards recharging structure

which may be of following types.

A. Recharging Pits

In alluvial area where permeable rocks are exposed on the land surface or at very

shallow depth, roof top rain water harvesting can be done through recharge pits.

This technique is suitable for buildings having a roof area of 100 square meters and is

constructed for recharging the shallow aquifers.


102

Recharge Pits may be of any shape and size and shall generally be constructed 1 m

to 2 m wide and 2 m to 3 m deep which shall be back filled with boulders (5-20 cm),

gravels (5-10 mm) and coarse sand (1.5-2 mm) in graded from-Boulders at the

bottom, gravels in between and coarse sand at the top. For smaller roof area, pit may

be filled with broken bricks / cobbles.

A mesh should be provided at the roof so that leaves or any other solid waste / debris

is prevented from entering the filter chamber / pit.

B. Recharge Trench

Recharge trenches are suitable for buildings having roof area of 200-300 square

meter and where permeable strata are available at shallow depths.

Trench may be 0.5 to 1 meter wide, 1 to 1.5 meter deep and 10 to 20 meter long

depending upon availability of water to be recharged and available land.

These recharge trenches shall be back filled with boulders (5-20 cm), gravels (5-10

mm) and coarse sand (1.5 to 2 mm) in graded form- boulders at the bottom, gravel in

between and coarse sand at the top.

A mesh should be provided at the roof so that leaves or any other solid waste / debris

is prevented from entering the filter chamber / trench.

C. Trench with recharge well

In areas where the surface soil is impervious and large quantities of roof water is

available within a very short period of heavy rainfall, the use of trench / pits is made to

store the water in a filter media and subsequently recharge to ground water through

specially constructed recharge wells.

This technique is ideally suited for areas where permeable horizon is within 3 m

below ground level.

Recharge well of 100-300 mm diameter is constructed to a depth of at least 3 m to 5 m

below the water level. Based on the lithology of the areas, well assembly should be

designed with slotted pipe against the shallow and deeper aquifer.

A lateral trench of 1.5m to 3m width and 10m to 30m length, depending upon the

availability of water is constructed with the recharge well in center.

The number of recharge wells in the trench can be decided on the basis of water

availability and local vertical permeability of the soil.

The trench is backfilled with boulders, gravels and coarse sand to act as a filter media

for the recharge wells.

If the aquifer is available at greater depth say more than 20m, a shallow shaft of 2m to

5m diameter and 3-5 meters deep may be constructed depending upon availability of

runoff. Inside the shaft a recharge well of 100mm-300mm dia. is constructed for

recharging the available water to the deeper aquifers. At the bottom of the shaft a filter

media is provided to avoid choking of recharge well.

Bye-pass arrangement with provision of suitable valve shall be installed in the rain

water drain pipe just before every filter chamber to reject the first shower.


103

6.12.5 Disposal of treated effluent

6.12.5.1 Treated Effluent Channel / Pipe

The treated effluent after disinfection is to be either used for irrigation or disposed of

into the adjoining drain. Hence bifurcation chamber of suitable size with 2 control gates

and weirs is required to regulate the flow as per irrigation demand. The carrying system

can be either a RCC Channel or pipe. The pipe can be RCC with HDPE lined.

In case provision of secondary pumping station is required to pump the treated waste

water into the drain or achieve water level as prescribed elsewhere in the bid

document, the necessary arrangements like construction of sump, pump chamber,

suction and delivery mains, control valves / gates and all electrical mechanical systems

shall also be in the scope of work.

6.12.6 Miscellaneous

6.12.6.1 Stairs

RCC / MS staircase (minimum 1.2 m wide) shall be provided to access all the platforms

provided/required for all the units above ground level. The tread shall be 250 mm and

rise shall not exceed 175 mm. The width of the staircase and their type shall be as

approved by Engineer-in-Chief before execution of the work.

6.12.6.2 Railings

Railing shall be provided along all the platforms above the ground level and staircases.

The railings shall consist of three horizontal rows of 40 mm i/d GI pipe, Class B

supported on CI pedestals 1 m high fixed at interval of 1.5 m c/c.

6.12.6.3 Painting, Whitewashing and Allied Works

Operations Buildings

All the units/items/equipment of the Operations Building shall be painted/coated

wherever required. All the internal surfaces of the walls and ceiling of buildings shall be

painted with plastic emulsion paint. All the external surfaces of operations building shall

be cement based paint.

Water Retaining Structures

The inner concrete surfaces of all the water retaining structures including channel shall

be painted (two coats) with approved make anticorrosive/epoxy paint.

Pipes and specials

All the MS / CI / DI pipes and specials and other equipment shall be painted with two

coats of approved make anti corrosive paints.

6.12.6.4 Lowering of ground water table during construction

The ground water table, if encountered, during construction shall be lowered sufficiently

so as to enable construction in dry conditions

6.13 Electrical & Instrumentation Works

It shall be the Contractor’s responsibility to obtain adequate incoming HT power from

State Electricity Authority (PSPCL) based on total plant load and as per PSPCL norms.


104

The Employer will pay the charges for obtaining the above connection whereas

necessary liasoning for the same shall be done by the Contractor in consultation with

Engineer-in-charge.


per PSPCL norms shall be provided. These shall be step down Transformers

suitable for outdoor installation and as per specification given in Volume-2 Part-4.

The entire Plant shall be operated on 415 V, 3-Phase, 50 Hz, 4-Wire system. The

Contractor’s Scope of Work shall include the following:

Obtaining incoming HT Power from PSPCL including necessary liasonoing,

documentation etc. complete.

HT Cable with Termination Kit from “Source” to the Electrical HT Substation

located at the Sewage Treatment Plant.

HT Substation including 4-Pole Structure, HT Panel, Transformers, Power Control

Centre with APFC Capacitor Panel etc. complete.

Motor Control Centres.

Silent DG Set with AMF Panel & other accessories for entire load of STP and

average flow plus other misc. load of MPS.

LT Bus-Duct

Power, Control and Instrumentation Cables including trays, ducts, support etc.

ACDB, DCDB, Battery & Battery Charger, UPS

Earthing for Electrical equipment as well as Instruments, PLC/SCADA.

Lightening Protection

Complete Indoor & Outdoor Lighting System.

Local Control Panel, Field JB, welding receptacles.

Local Push Button Stations near respective Drives.

Fire detection & Alarm system, plant communication.

Flow Meters at inlet, outlet & by-pass.

Level Transmitter, DO Transmitter, Pressure Gauge, Auto Valves

Online Monitoring System for raw and treated sewage quality.

CCTV System

Safety items (shock treatment chart, first aid box, CO2 fire extinguisher, insulating

mat, hand gloves, caution boards, LED signage, sand buckets, discharge rods

etc.)

All civil works required for complete installations.

Any other item / accessories required as per process requirement and for

successful completion of the Project.

The Contractor shall design/execute the System as per specifications (Volume-2 Part-

4), I.E. Rules and Regulations, requirements of PSPCL and other local Authorities

and actual site conditions.

Also, the Contractor shall provide PLC/SCADA based Automation for entire plant as

described in below clause.

6.14 PLC/PC/SCADA Based Automation System for entire plant

The complete Plant shall be designed for automatic operation through Programmable

Logic Control (PLC) and Supervisory Control and Data Acquisition (SCADA). This

shall be achieved by either individual equipment PLCs with SCADA/HMI or single


105

PLC and SCADA for entire Sewage Treatment including pumping stations. Operation

of primary treatment units and sludge dewatering units shall be manual however

indication of operation of primary treatment units and sludge dewatering units shall be

on PLC/SCADA. These shall be located at control room of the STP.

The plant shall have provision for operations in following modes:

Automatic – Auto operation through PLC/digital controller.

Manual – Operator intervention through SCADA/HMI.

Local – Local operation through local control panel located near equipment.

a) Audio Visual Alarms

Audio visual alarms shall be initiated under emergency or equipment trip conditions,

other than usual service alarms. Salient features of the proposed control system shall

be as follows:

Dynamic display of all Units, equipment and drives shall be available on SCADA

screen.

It shall Acquire, process and manage the processed data.

It shall safeguard the process by means of interlocks and alarms.

Auto/Manual operation of each drive shall be made by selecting a soft switch on

SCADA/HMI screen.

In Auto mode, each drive shall operate based on pre-set sequence and interlock.

Also automatic change over from working to standby drive shall happen after a

drive reaches pre-set hours of operation.

In Manual mode, each drive shall be operated in Local/Remote mode by selecting

a soft switch on SCADA/HMI screen. In Local mode, each drive shall be operated

from the Local Push Button Station (LPBS) located nearby. In Remote mode,

operation from LPBS shall be disabled and each drive shall be operated manually

from PLC. Also provision for working/standby selection of drives by selecting a soft

switch on SCADA screen shall be provided.

Run/Trip indication of all drives shall be displayed on SCADA/HMI screen.

Open/Close indication of all Auto Sluice Gates and Auto Valves shall be displayed

on SCADA/HMI screen.

Annunciation & Alarm facility shall be available in PLC/HMI/SCADA. In the event of

a Fault, the symbol representing the equipment/drive shall continue flashing on

SCADA/HMI screen with equipment/drive description appearing at bottom of the

SCADA/HMI screen and electric Hooter shall continue blowing until the Fault

Alarm is acknowledged.

Data logging of Running Hours of each drive, Alarms, Historical Trends of

monitored Parameters, etc. shall be envisaged in SCADA.

Report generation for plant performance.

The process system must have pre-configured software packages which can be

adapted to the process by parameterization.

The monitor images must be designed to be user-friendly by hierarchical breakdown

with the possibility of selective display and optimum selection possibilities.

Changing of parameters and other software units must be possible "online", i.e. with

the system running.


106

Different alarms colors provide information on their priorities.

For the system engineering offered, the Contractor must take measures, e.g. by the

installation of surge voltage arresters or surge voltage filters, to ensure that internal

and external surge voltages do not impair the function of his parts of the system.

The programs and data entered must be backed up in a non-volatile read-only

memory.

A limit value and plausibility check must be provided in the software of the process

station for the measured values and messages. Exceeding of limit values or

deviations detected by the above checks must trigger an event and cause a message

to be sent.

Further demanded features of the process system:

Integrated, detailed error message and fault detection concept with display on the

HMI/SCADA for quick localization of faults. The system operator must be able to

identify the fault from the error.

Essentially maintenance-free

Robust against external interferences of all kinds

Proven design and solder-free connection technique

Protection of the equipment against surge voltages

Automatic fault detection and quick troubleshooting in the PLC system by

integrated, hierarchically structured diagnostic devices

Power supply in wide admissible voltage range

Simple function-oriented operation

The process system (PLC, HMI/SCADA) shall be protected against power failure by

an uninterruptible power supply (UPS). When the critical charge state of the UPS is

reached, the process system is automatically shut down.

b) Mode selector switch

A mode selector switch is to be installed on the MCC or distribution board. It serves for

pre-selection between Automatic mode and Manual/Local mode.

The following switching functions must be provided:

Automatic – Manual/Local

Automatic: In this position, only automatic operation is possible; the local switches

have no function (Except emergency stop).

Local: Automatic mode cannot be started. The drives can be operated individually

without interlock with the local switches.

Local switches (LPBS)

Each drive must be equipped with a local switch positioned in such a location that the

corresponding machine or conveyor can be switched on in Manual/Local mode and can

be monitored visually at all times.

The local switch must have the following switching functions:

START – STOP (for drives with one direction of rotation)or

FORWARD – STOP - REVERSE (for reversible drives)


107

If a unit has several drives (e.g. conveyor belt drive and travel drive), the local

switches should be installed if possible in one switch box or at least installed next to

one another.

Each local switch must be adequately labelled in plain text so that no operator errors

can occur.

c) PLC

The automatic start-up of the whole system, sequential operations and the automatic

shutdown, allowing for external control influences, e.g. EMERGENCY STOP, etc., is

performed by programmable logic controller (PLC).

This performs not only the control of the system, but also the display of the operating

state in the HMI/SCADA.

The interlocks of the individual process groups and their signalling must be performed by

the PLC.

A system must be selected which is sufficiently protected against external interference in

the supply, control and signalling lines. The aim is that the program can continue to run

without fault signals in the event of transient earth faults in the supply grid. In the event

of prolonged power failures, on the other hand, a controlled restart must be triggered

(under-voltage trip of the non-automatic circuit breaker).

PLC Specifications: Technical

The PLC shall be non-redundant.

PLC of individual equipment shall be selected to carry out necessary operations

without overloading the PLC memory.

The PLC shall have adequate I/O per card.

There shall be 15% spare I/O of each type.

The CPU shall not be loaded more than 60% of its capacity.

Retentively shall be 100% to save the recorded data and saving the programmed

logic, other attributes connected with system for power & system failure.

Change in programme / modifications to programme shall be possible by a portable

laptop.

It is preferred to have all PLC’s in the plant from same manufacturer.

HMI/SCADA system

The HMI system shall be designed as a minimum 6”, colour, touch-screen on the

panel. Whereas SCADA system must be computer based.

All displays must be designed by the Contractor with graphic sophistication and all

texts in the visualization system must be displayed in English.

A sub-menu for each operating mode and further menus for editing the system

parameters, fault archive, etc., must be developed. It must be as simple as possible to

switch between the various menus and to edit the system parameters.

When designing the user interface or the assignment of the function keys, attention

must be paid that the function key assignment remains the same in all sub-menus so

that it is possible to jump to another menu without first having to jump back to the main

menu.

It must be possible to edit the following parameters at the touch-panel and SCADA:

Operating mode

Changes in the speeds of frequency converter-controlled equipment

Start-up times


108

Shutdown times

Duration of the operation of warning devices

Limit values for sensors, etc.

Faults, level messages, pressed EMERGENCY STOP buttons, etc., must also be

clearly displayed at the bottom of the screen, irrespective of the selected screen page

or sub-menu.

It must be possible to output all important menu items to the printer. The corresponding

interfaces must be provided.

The display of the function plans, images, etc. is affected in direct dialog with the

system by means of the mouse and keyboard.

The central SCADA shall generate various reports to analyze plant performance. The

process is documented via the laser printer.

d) Computer hardware and software

All programs required for operation of the system must be correspondingly compatible.

The corresponding licenses must be supplied for the standard programs. The operating

systems must be agreed upon with the Client. Minimum requirements shall meet:

CPU

1. Processor Intel i 7 10th Gen

2. Processor speed 4 GHz or higher

3. Configuration Tower

4. Architecture 64 bit

5. System memory

(RAM)

16 GB

6. Hard disk 256 GB SSD+ 1 TB HDD

7. DVD Drive Combo (Read/Write)

8. Operating system Microsoft Windows 10 professional

9. Communication

ports

USB – 4 Nos., Ethernet – 1 Nos.

10. Graphic

accelerator

2 GB

11. Power supply 240V, 50Hz, 1Phase

12. Keyboard Internet Keyboard (with USB interface)

13. Mouse Optical, 3 buttons (with USB interface)

Monitor

14. Type Full HD LED color monitor

15. Screen size 24” or higher

16. Resolution 1920 x 1080


Complete Project shall operate in auto mode. As a minimum, following controls

must be considered in Bidder’s Control Philosophy:

1. Coarse screens

Each mechanical coarse screen shall be installed with ultrasonic differential level

transmitter / level switch, across it; the same shall be operated on the basis of set


109

differential level in SCADA. Also if differential level is not reached for certain time

period, the screen shall be operated on the basis of set time in SCADA.

The selection of Auto/Manual and Working/Stand-by shall be made available in

SCADA. In manual mode the screen operation will be done from SCADA screen.

Physical switch over of screens in plant will be done by operator using manual

gates.

Necessary interlocks, controls, alarms, report generation, etc. shall be considered

in PLC for auto operation of coarse screen.

2. Raw Sewage Sump and Pumps

The sump will employ an Ultrasonic level transmitter to measure level. The

combined operation of Raw Sewage Pumps will be dependent on rate of change

of level with reference to time. The selection of Auto/Manual and Working/Stand-

by shall be made available in SCADA. In manual mode the pump Start/Stop will

be done through SCADA screen.

A clamp on type Ultrasonic or Electromagnetic flow transmitter shall be provided

at common header of pumps for measurement of flow to sewage treatment plant.

PLC shall calculate instantaneous flow as well as cumulative flow, both shall be

displayed on SCADA.


in PLC for auto operation of Raw Sewage Pumps.

3. Inlet chamber

A clamp on type Ultrasonic flow transmitter shall be provided on rising main of

inlet chamber for measurement of flow coming to Sewage Treatment Plant. PLC

shall calculate instantaneous flow as well as cumulative flow, both shall be

displayed on SCADA.

4. Fine screens

Each mechanical fine screen shall be installed with ultrasonic differential level


level in SCADA. Also if level is not reached for certain time period, the screen

shall be operated on the basis set time in SCADA.




gates.


in PLC for auto operation of fine screen.

5. Grit Chambers

Each grit chamber will consist of Detroiter (1No.), Organic Return Pump (1No.)

and Screw Conveyor for grit removal (1No.). As such Detroiter, Organic Return

Pump and Screw Conveyor will not have auto operation; these will be started and

stopped from SCADA screen as required.

Necessary interlocks, alarms, report generation, etc. shall be considered in PLC

for operation of Grit chamber equipment.


110

6. Any Biological Unit

Complete operation and control of plant will be done through a separate PLC and

SCADA. However it shall have necessary inputs and generate required outputs to

operate in co-ordination upstream and downstream units of balance plant.

Alternatively contractor may provide single PLC and SCADA for entire Sewage

Treatment Plant.

Necessary interlocks, controls, alarms, report generation, etc. shall be

considered.

Each reactor shall be equipped with Level Transmitter, DO Transmitter for

monitoring and recording of critical operation parameters through SCADA.

7. Sludge sump and pump

An ultrasonic type level transmitter shall be used for measurement of level in

sludge sump.

Screw pumps/ Reciprocating will be used to feed sludge to mechanical

dewatering unit. These will operate as per level in sludge sump.


SCADA for sludge pumps. In manual mode the Start/Stop of pump will be done

from SCADA screen.


for operation of chlorination system.

8. Chlorination tank


SCADA for booster pumps. In manual mode the Start/Stop of pump will be done

from SCADA screen. Though chlorinator will have standalone operation,

feedback for the equipment shall be taken to PLC and displayed SCADA for

monitoring purpose.



9. Centrifuge/ Belt Filter Press

The drives and instruments of mechanical dewatering units shall be connected to

PLC for its auto operation. Starting of dewatering system will be a manual

process.


for auto operation of centrifuges.


111

7. Detailed Scope of Work for 225 MLD STP JAMALPUR

Design Requirement described here are in general for various works. However

specifications for only those Materials /Equipment/ Instruments shall be

applicable which are required or provided at site. If the specification of any items

are not described here then specifications as per the relevant IS code or

prevalent as per the department practice will be applicable as approved by

Engineer-in-charge.

7.1. Raw Sewage Pumping Station of 225 MLD Capacity at STP Premise

7.1.1. Components of Main Pumping Station

Civil Works

i. Receiving Chamber ii. Screening Channel iii. Wet well/Collecting Tank iv. Panel Room v. Roads & Pavements vi. Platform /Foundation for Diesel Generating Set & Transformer vii. Cable Trench, wire mesh around transformer viii. White washing/painting etc. ix. Hand Railing x. Pumping main from MPS to inlet chamber of STP xi. Valve chamber/platform to house common header, all valves, NRVs etc.

i) Receiving Chamber

The deep gravity outfall sewers will discharge the raw sewage into a Receiving

chamber. The function of the Receiving chamber is to distribute the flow to Screens.

The Receiving Chamber shall be designed for peak flow. The Receiving chamber

shall consist of sluice gates on upstream for flow regulation. The receiving chamber

shall be of adequate size to meet the requirements of workability inside it. C.I gate

(Manually Operated) of suitable size shall be provided at the inlet of receiving

chamber. The entire construction is in minimum M-30 grade concrete and as per IS

3370. RCC access platform minimum 1200 mm wide with GI pipe railing as per

specifications shall be provided on one side of the chamber:

Average flow : 225 MLD

Peak factor : 2.0

Peak Flow : 450 MLD


Min. Detention period : 30 Sec at Peak Flow


ii) J Type Removable Bar Thrash Screens

Manual Trash screen to be installed in front of coarse mechanical screens to

prevent large and medium sized floating wastes from entering into intake structure

of pumping station.




112

provided should be with perforated basket at its bottom and guide roller on both sides

for easy removal. Guide channel extend upto top of platform for guiding upward

movement. The height of trash screen should be 0.5 m above sewer crown. Material

of construction should be in SS-304. Flat size shall be of 10 mm thick 50mm wide.


Peak factor : 2.0

Peak Flow : 450MLD

Number of Units : 4 (Working) each of

25 % Peak Flow capacity

Velocity through Screen at Average Flow (m/sec):0.6 maximum

Velocity through Screen at Peak Flow (m/sec) : 1.2 maximum




contract shall be in contractor’s scope. Railings shall be provided around the entire




provided.

iii) Coarse Screen

Four mechanical screen working and two manual screen standby of 20 mm clear

spacing shall be provided with each screen designed for 25% of peak flow capacity.

The mechanical and manual bar screens shall be made of 10 mm thick Stainless

Steel (SS 304) flats respectively. The mechanical coarse screens shall be of Inclined

Rake Type of 20 mm opening as per the specifications detailed elsewhere in the

tender. Bin and chute arrangement shall be provided to take the screenings. The

screenings dropped from chute will be collected in a wheel burrow. Manually

operated CI gates are provided at the upstream and downstream ends to regulate

the flow.


Railings shall be provided around the entire periphery of the platform. The entire

structure is to be in minimum M-30 concrete and as per IS 3370 including the

platform. RCC staircase 1200 mm wide shall be provided for access from the ground

level to the top of the unit & to the operating platform.


Peak factor : 2.0

Peak Flow : 450 MLD

Flow MLD

Peak factor

J Type Manual Thrash Screen

Mechanical coarse

Screens

Manual coarse

Screens

1 Jamalpur 225 2 4 4 2



113

(Standby) each of 25% Peak Flow

Approach Velocity at Average Flow (m/sec) : 0.3


(m/sec)

Velocity through Screen at Peak Flow (m/sec):1.2 maximum





iv) Wet Well

The Main pumping station (MPS) shall be a rectangular concrete structure. The sump

well is to be in R.C.C of min Grade M-30 and shall be designed for peak flow. The

maximum operational liquid level in wet well shall be such that, minimum 100 mm

Freefall shall be maintained between Invert of Screen Chamber and Water level of wet

well. The capacity of the wet well sump should be kept such that the detention time of

the sump should be 5 minutes peak flow. The wet well shall be divided into two equal

compartments upto full height with sluice gates in common wall.

The pumps shall be installed equally in two compartments. Area of gate(s) should be

sufficient so as to divide the flow into any of the compartments, at a velocity not more

than 1.2 m/sec.



submergence of the pump shall be provided as per the manufactures

recommendations. The size of wet well shall be sufficient to accommodate one

additional pump in each compartment, in future.

RCC Staircase to be provided in each compartment of wet well from full supply level of

sump. Aluminium ladder (removable) from last landing of staircase to the bottom of wet

well.

IS: 3370 and IS: 4111 (Part 4) shall be followed for the design and construction of Wet

Well.

Basis for Design

All underground or partly underground liquid containing structures shall be designed for

the following conditions:









114





Underground or partially underground structures shall also be checked against stresses

developed due to any combination of full and empty compartments with appropriate

ground/uplift pressures on the base slab.

v) Sewage Pumps


automatically controlled based on wet well level. There will be high level and low level

alarm and tripping system installed. It will house non clog submersible pumps, which

will always be submerged in sewage with minimum submergence as required by the

manufacturer. Pumps will have automatic coupling arrangement at discharge end, a

guide pipe and chain for easy removal and lowering of pumps. Vibration shall be

limited as per BS 4675 Part I

Type of Pumps : Submersible type non-clog design

Liquid : Raw Sewage

Specific gravity : 1.05

Solid Passage Size : Maximum 100 mm.

No of working Pumps : 10 Nos.

Capacity of Pump : Peak flow/ No of working pumps

Standby Pumps : 50% of working pumps.

VFD for pump : 2 Pumps in each compartment is to have the

provision of VFD for flow variation




operated. The gantry is to be fixed on RCC framed structure and not on a cantilever arm

from columns.

vi) Rising main:

Sewage from wet well will be pumped to STP, through rising main of size suitable to

carry peak flow.


Size of rising main : Capable of carrying peak flow as specified in bid

document

Velocity in rising main at peak flow : Maximum 2.5 m / sec

vii) Piping & Specials


specials:


115

(i) RCC Channels from inlet chamber of screens upto sump/ collecting tank.

(ii) DI K-9 Delivery line for individual pump upto common header.

(iii) Expander, Sluice valves, Bends, Non Return Valves in the individual delivery


(iv) DI K-9 Common header upto Inlet of STP.

(v) The size of pipe shall be calculated so as to meet the following velocity

criteria:-

a. Minimum Velocity : 0.60 m/sec

b. Maximum Velocity : 2.5 m/sec

(vi) All other required fittings such as bends, tees etc.

(vii) Thrust block of M-20 grade, for support, etc.

(viii) Necessary by pass arrangement shall be provided to be used during the

shutdown of the plant. Pipe and Valve arrangement upto suitable discharge


viii) Painting, White Washing and allied works

The internal and external surfaces of the walls and ceiling of all building structures shall

be applied with two coats of Birla / JK Wall Putty followed by two coats of primer

followed by min two coats of first quality plastic emulsion paint.

All the structural steel, pipes, specials etc. shall have two coats of Epidec RTC Primer

followed by two coats of epoxy paint.



ix) Roads & Pathways with proper drainage



Thickness of paver blocks on roads is 80 mm thick and on pathways the thickness of

paver blocks is 60 mm. Paver blocks shall confirm to specification of code IS 15658

Paver blocks will be ISI Marked.

x) MPS Panel Room

It shall be RCC framed structure and 3.5 m clear height. It shall house panels of MPS

pumps, screens, sluice gates, valves etc. It shall also house PLC Panels and HMI

screen for display of various parameters of MPS. Preferably the MPS panel room

building is to be adjoining to the administrative building of STP so as to have a better

monitoring.





feature and lockable in pressed position to avoid accidental operation of drive from

MCC, PLC during shutdown.

LPBS shall be suitable for use in outdoor open locations with minimum IP-55 degree of

protection and rain canopy.

7.1.2. Mechanical Works


116

i. J Type Manual Coarse screens, Manual and Mechanical Coarse Screen, Belt Conveyor for screens

ii. CI Sluice Gate shall be provided at following locations for flow control

a) Inlet of Receiving Chamber – 1 no. b) Upstream of coarse screens of MPS – 6 Nos c) Downstream of coarse screens of MPS – 6 Nos d) RCC Partition Walls of Wet Well – 1 No e) Any other gate as required

iii. Non clog Submersible Centrifugal Pumps sets with motor iv. Piping works, Dismantling Joint, NRV, Sluice Valve with appurtenance v. Lifting Arrangement –Monorail with electric horizontal and vertical operation

7.1.3. Electrical, Instrumentation & Control Works

i. HT VCB Panel ii. Transformer ONAN with on load tap changer iii. Silent Diesel Generating Set with AMF Panel suitable for average flow plus

other miscellaneous load. iv. Electrical Panel with



v. HT & LT Cable, Instrument & data cable vi. Cabling system vii. Earthing & Lightening Protection viii. Lighting System (Indoor & Outdoor) ix. Junction Box for cables x. UPS for PLC xi. Instrumentation & Control

This includes supply, erection, testing and commissioning of various instruments &

control system. Brief details are as under:

S No Instrument Location Quantity




1



2


Panel Room 1


requirement




117




rotation. Pumps operation shall be closely co-ordinated with STPs sewage

requirement through STP PLC/SCADA




Single PLC for MPS and STP is preferred. Contractor is free to provide separate

PLC for MPS.

PLC to have provision for exporting data to external device.

7.2. STP i) Flow Measurement


main of raw sewage pumping station located at STP area.

ii) Inlet Chamber



Min. Detention period : 30 sec on peak flow


Following provisions shall also be to be made as per detailed design:



1 no. CI /DI double flanged Sluice Valves

CI/DI Horizontal pipe having length as per Site Requirement.

Minimum 150 mm i/d CI/DI pipes along with sluice valves for scouring

purposes.


Four mechanical Step/MATT type screen (working) with two manual (standby)

screens are proposed in the screen chamber. The screen channels shall be

designed for peak flow.

RCC Platforms minimum 1.2 meter wide with GI railing shall be provided at suitable




Manual Standby each of 25% peak flow.

Approach Velocity at Average Flow

(m/sec.)

: 0.3 minimum


Flow (m/sec.)

: 0.6 maximum

Velocity through Screen at Peak Flow : 1.2 maximum


118

(m/sec.)

Free board : Min 0.5m on upstream side of the screen

at maximum water level


Flow

(MLD)

Peak

factor

Mechanical Screens

Manual Fine

Screens

1 Jamalpur 225 2.0 4 2



Railing as per specifications shall be provided. RCC Staircase, minimum 1.20 m

wide with G.I. Hand Railing as per specifications shall be provided for access from


The clear spacing shall be 6 mm for Mechanical Fine Screen and spacing of 10 mm

for Manual Fine Screen. The Mechanical and Manual Screens shall be made of SS


Minimum 3mm thick panels of stainless steel 304 construction shall incorporate

6mm diameter perforations.


Screenings dropped from Chute shall be collected in a wheel Burrow. Manually

operated CI/Aluminum Sluice Gates shall be provided at the upstream and

downstream ends to regulate the flow.

Detailed specifications of mechanical screen are given in Mechanical Section.


Mechanical grit chambers are proposed after fine screen units. The mechanical grit

chambers shall be Square Mechanical Detritus Tank.

Mechanical Grit Chambers with 50% standby and Manual Bypass Channel

(Standby) shall be provided after Fine Screen Channels. Each Grit Chamber shall

be designed for 1/6th of Peak Flow whereas Bypass Channel shall be designed for

1/6th of Peak Flow.

The entire construction shall be in minimum M-30 grade reinforced cement

concrete and as per IS 3370. RCC Platform/Walkway, minimum 1.20 m wide with

G.I. Hand Railing as per specifications shall be provided. RCC Staircase, minimum

1.20 m wide with G.I. Hand Railing as per specifications shall be provided for

access from Finished Ground Level to the top of the Unit & to the Operating

Platform/Walkway.


One tapered Inlet Channel running along one side with adjustable

Influent Deflectors for entry of sewage into the Grit Chamber.

One tapered Outlet Channel for collecting the de-gritted sewage, which

overflow over an adjustable Weir into the Outlet Channel. It shall be

designed in such a way that no settling takes place in it.

One sloping Grit Classifying Channel in to which the collected grit shall be

classified.


119

The grit from Classifier shall be collected in a Wheeled Trolley.




Manually Operated C.I. / Aluminum Sluice Gates shall be provided at

entrance of the Inlet Channel of the Grit Chambers as well as Bypass

Channel to regulate the flow.

No. of Units : Total flow in all working units equal to peak flow

Type : Mechanical



Maximum Surface

Overflow Rate : 959 m3/m2/day


Side Water Depth : 0.90 m min.

Wheelbarrow : 6 Nos. minimum


Contract shall form the part of Bidder‘s Scope.


inlet.

v) Distribution Box/Splitter Box

A Distribution Box / Splitter Box shall be provided downstream of Grit Chambers

prior to Biological Reactors for uniform flow distribution to Biological Reactors. The

Distribution Box shall be equipped with suitable motorized Sluice Gates and outlet

Weirs.

vi) Biological Treatment

The bidder can adopt any suitable, sustainable & proven technology including SBR

& MBR with its variants for biological treatment of sewage.

Anaerobic Reactors


Anaerobic Hydraulic Retention Time As per CPHEEO

Min. Liquid Depth of Reactor 5.0 mt.




Anoxic Reactors

Design Anoxic HRT As per CPHEEO



Min. Liquid Depth of Basin 5.0 mt.




120

Primary Clarifier


Surface Loading Rate at Average flow 35-40 m3/m2.day


/d/m2 (max.)










Size Suitable


operated

7.3. Biological Reactors, Settling and Decanting System







Design parameters : All design parameters like, MLSS, HRT, F/M, DO

level, recirculation ratio etc. shall be as per CPHEEO

manual for the offered technology.





Miscellaneous

requirements

: The treated waste water shall be available on

continuous basis.

The Reactors to treat design flow sewage

irrespective of flow variation pattern of inflow

sewage.

Any other

requirement

: As per bidder technology and design to meet the

desired outlet parameters.

Secondary Clarifier


Surface Loading Rate at peak flow 40-45 m3/m2.day for activated sludge

25-35 m3/m2.day for extended aeration


121

Weir loading rate at average flow 185 m3/d/m (max.)

Solids loading rate at peak flow 210 kg/d/m2 (max.) for activated sludge

170 kg/d/m2 (max.) for extended

aeration






MOC/Paint MS/Epoxy Painted- Wetted parts SS 304

Sludge Drain Valves (KGV) of Secondary Clarifier or SBR Basins


Size Suitable


operated Return and Excess Sludge Sump with Pump House

Return Sludge Pumps

No. of Return Sludge Pump suitable

Capacity of Return Sludge Pump suitable

Type of Pump

Submersible Non-clog / Horizontal

Centrifugal Non-clog type

Pump Head As per hydraulic design

Valves at delivery, Suction and

common header lines

Knife Gate Valves - Electrically operated

Excess Sludge Pumps

No. of Excess Sludge Pumps suitable

Capacity and head of Excess Sludge

Pumps

suitable





Ground Level to the top of the Unit & to the Operating Platform/Walkway. Plinth

protection along periphery shall be provided as per technical specifications.

7.3.1 Return Sludge and Excess Sludge Pumps











122










7.3.2 Decanting Device

The Decanter Device shall be Moving Weir Arm Device of SS 304 with top

mounted Gear Box, Electric Drive, Scum Guard, Down comers, Collection Pipe,

Bearings.

Weir loading for each decanter shall not exceed 125 m3/m/hr of the inlet weir.

7.4. Aeration System for Selected Biological Treatment

Oxygen Required

BOD Oxidation Oxygen Requirement 1.2 x Inlet BOD Load



Requirement

Oxygen Credit (from De-Nitrification)

Oxygen release during denitrification

= 2.86 mg O2/mgN

Max O2 credit of denitrification can

be only 50% of nitrification

Alpha value for Submerged Diffuser 0.65 (Maximum)

Beta value for Submerged Diffuser 0.95 (Maximum)




Type of aeration Energy efficient diffused aeration

system.

Blower details:-

Type : Turbo Blowers



No. of units : As per design requirement with 50% standby

All Air Blower shall be provided with VFD.

The operation of Aeration System shall include PLC based control. The

operation and speed of Air Blowers shall be automatically adjusted using

parameters like Oxygen required, Dissolved Oxygen and Temperature and

Liquid Level in the Rector such that the DO is supplied as per demand and

power utilisation for operation of Air Blowers is optimised.


123



Header/Ring Main shall be supported on saddles at suitable intervals or shall

be protected against external corrosion in case laid below ground. The Sub-

headers distributing air to various locations shall have Auto Valves to facilitate

air switch over between different demand locations. The Sub-header shall

supply air to Fixed Type Diffuser Grids at various locations through vertical Air

Supply Pipes. These Air Supply Pipes above water level shall be in MS,

painted with corrosion resistant paint and below water shall be in SS 304. All


header and vertical Air Supply Pipes shall be suitably protected against

corrosion due to dissimilar materials.


shall form part of Contractors scope.


Fine Bubble Type, PU / EPDM Membrane Diffusers shall be acceptable with


submerged, fine bubble / fine pore, high transfer efficiency, low maintenance

and non-buoyant type. Diffusers shall be panel / Disc / tubular type. Complete

Diffuser as a unit shall be assembled at the manufacturing factory level. The

grid supports shall of adjustable type made of SS 304.

7.5. Tertiary Filtration System: Fiber Disc filter (FDF)

Tertiary Treatment Plant shall be designed for average flow and provided in the form

of Disc filters which shall consists of following:

• Civil (RCC) Tank to house the Fiber Disc filter


• Drive Assembly

• Backwash System



Disc filter assembly with Filter Cloth:


manufacturer). Each Disc shall be subdivided into smaller sections to constitute a

prefab disc frame (module) so as to ensure easy replacement and maintenance.

Each disc consists of multiple panels. In case of replacement of fiber cloth, the left

and right of the fiber cloth shall be replaced quickly without disassembling of

segments (Disc frames). Each disc shall be mounted on the centre drum by strap

band (steel band) for the exact roundness and it shall not be fixed by Stud bolts. The

additional sealing material shall not be needed for assembling of filter cloth to

segment and the fiber cloth itself shall be acted as the sealing material. Filter cloth

shall envelop some parts of backside of filter frame and the several springs shall be

used to fix the filter cloth. The drum shall be round type and shall have the enough

area in order to discharge the treated water without trouble. The material of the filter

cloth shall be polyester; the filter frame that fixes the filter cloth, the disc frame and


124

the segment cover shall be ABS resin. Central drum shall be SS304. Maximum

Filtration rate shall be 10-12 m3/m2/hr. Nominal pore size of filter cloth shall be

approx. 10 micron.

Filter shall be designed for average flow or decant flow whichever is higher. Suitable

no. of units shall be provided. Raw water shall flow into the respective Disc filter by

gravity. The structure shall ensure that Suspended Solids (SS) are filtered (treated)

from outside to inside of the filter cloth installed on both sides of the disc filter, and

that filtered water is discharged through the centre drum to the treated waterway.

Sr



type









(mm) As per design




Drive Assembly:



transmitted by the SS 304 chain. A protective cover made of SS 304 shall be

equipped for the drive motor, reduction gear and the chain. The rpm of the disc filter

drive shall be adjustable by the inverter that is attached in the field control panel.

Backwash system

Cleaning device consists of Suction cleaning unit, which conducts the suction

cleaning in the each side of disc, the automatic valve and the suction cleaning pump.

Cleaning device shall clean the contaminated filter cloth thoroughly by the suction unit

on both sides of disc with automatic valve and suction cleaning pump which shall be

activated by the water level switch that contacts the water level raised with the

increase of the loss of head. Disc filter should be operated for filtration without the

stop during backwash and suction of sludge. Suction cleaning unit shall be made of or

the even cleaning efficiency without dead zone for all area of filter cloth.





125

7.6. Disinfection System



Chlorine Tonner House shall be designed for Average Flow or Decant Flow

whichever is higher.

7.6.1 Chlorination Tank and Chlorinator cum Chlorine Tonner House

Treated sewage after filtration process unit shall be taken to Chlorination Tank by

RCC Channel/DI K-9 pipe. Gas Chlorine shall be added for disinfection at suitable

dosing rate. Baffle walls shall be provided in the Tank to facilitate hydraulic mixing of

treated sewage. The entire construction shall be in minimum M30 grade reinforced

cement concrete and as per IS 3370.

Design Flow : Average Flow or Decant Flow whichever is more





Tank to house Chlorination Systems. It shall be RCC (M25) Frame cum Brick

Masonry Structure with Rolling Shutter, Windows & Ventilators, Electrical Hoist with

Electrical Travelling Trolley of minimum 3 Ton capacity or 1.5 times the weight of the

single Unit whichever is more to lift the Pumps/Chlorine Tonners and Safety

Equipment including Sand Buckets, Fire Extinguishers and Fire Alarms etc. Also it

shall be provided with IPS Flooring, Internal & External Plaster and Internal &

External Painting. Plinth Protection shall be provided along the periphery as per

specifications.



7.6.2 Chlorination System



Empty Chlorine Tonners (Suitable for 15 days’ Storage) with Tri unions, Lifting Device


Exhaust Fan, Canisters, Gasmasks etc.), Mandatory Spares, Chlorine Leak

Detection and Chlorine Leak Absorption System including FRP Half Hoods, Caustic

Solution Tank, Caustic Recirculation Pump, Centrifugal Fan, Interconnecting Piping

and Ducts complete and other required ancillary shall be provided.

The system must have the provision for linking its operation to PLC of STP so

that quantity of chlorine usage can be varied automatically as per treated water

flow from filtration units.

Design Flow : Average Flow or Filtered Flow whichever is more

Type : Vacuum Type

Chlorine Dosing : As per process requirement subject to Infrastructure

arrangement for at least 5 ppm dose.

Quantity of Chlorinator : 2 Nos. (1Working + 1Standby)


126




RCC pipe.

7.7. Sludge Handling System

7.7.1 Sludge withdrawal from various units.



be collected in a single sludge sump and shall be fed to:

a. Gravity Thickener followed by Centrifuge dewatering machine

or


7.7.2 Sludge Sump





provided

Number of Units : 1 (one) nos.

Free Board : 0.5 m

Capacity : Minimum 6 hr holding of average daily

sludge production

Minimum SWD : 3.0 m

7.7.3 Sludge thickener unit with Centrifuge





Design criteria



Continuous gravity thickener shall be

circular RCC units with minimum 3.0

m side water depth. Side depth shall

be based on three considerations.

Free board 600 mm

Sludge Thickener Mechanism

The mechanism shall comprise of the following main components of suitable size as per design requirements: All wetted parts shall be SS 304.

Bridge Superstructure spanning the tank diameter with central drive maintenance platform


127

Drive assembly complete with drive head, chain and sprocket, geared motor etc.

Feed Well Center Shaft Cone scraper Rake arms Tie rods for rake arms Plow blades & squeegees

Material of Construction Tank RCC Bridge MSEP Feed Well SS 304 Walkway MS Chequered Plate / Grating Handrail 40 mm i/d GI pipe, Class B Rake Arm SS 304 Vertical shaft SS 304

Blades SS 304 v-notch weir FRP / SS 304 Squeegees Neoprene Anchor Bolt SS 304 Fasteners- Under Water SS 304 Fasteners- Above Water GI / SS 304


7.7.4 Sludge Pumps

Sludge Transfer Pumps shall be provided to feed sludge to sludge dewatering units. The pump shall be suitable for handling biological sludge. All pumps including standby shall be installed.

Pumps Capacity and Head : Sufficient for handling total daily sludge in 22 hours maximum

Type : Screw Pump/ Reciprocating pump Liquid : Bio-sludge for thickener and dewatering

machine. Solid Size handling : 40 mm (Maximum) Specific Gravity : 1.05 Efficiency : More than 50 % Installation : Fixed Quantity : Minimum 2 no. (1W + 1S) for dewatering

mechanism feeding Minimum 2 no. (1W + 1S) for thickener feed

7.7.5 Centrifuge Units

The centrifuge shall be solid bowl centrifuge of co-current / counter current design. The

centrifuge shall have sufficient clarifying length and differential RPM so that separation

of solids is effective. The centrifuge shall have central lubrication system. The

centrifuge and its accessories shall be mounted on a common base frame so that

entire assembly can be installed on an elevated structure.

Suitable drive with V-belt arrangement and turbo-coupling shall be provided along with

overload protection device. Centrifuge shall be with SS-304 wetted parts.


128





with anti-vibration pads. All steps necessary to prevent transmission of structure borne

noise shall be taken. Adequate sound proofing shall be carried out.

A hoist shall be provided above centrifuge for maintenance purpose. The hoist shall be

such that it shall be possible to erect or de-erect the centrifuge while one centrifuge is

in operation.

Number of centrifuges : At least 2 Nos. (1W + 1 SB) Type : Horizontal Operating Hours : 22 hrs. per day maximum Mixing arrangement of Polyelectrolyte and sludge

: Online mixing

Dewatering polyelectrolyte dosing system is to be provided to dose poly electrolyte


7.7.6 Combined Belt Thickener cum Belt filter press units

The Sludge Dewatering Device shall consist of combo units which includes Mechanical

Thickener and Belt Filter Press along with all appurtenances. It shall be designed to

adequately condition and dewater the sludge so that the dewatered sludge cake is

produced that easily discharges from the Belt Filter Press to collection trolley.

Flocculator arrangement in SS-304 of suitable capacity shall be provided at the inlet of

each Belt Filter Press for mixing of sludge and DWPE. All other accessories, whether

specified or not, but required for complete operation shall form part of contractors

scope.


Operating Hour : 22 hours per day maximum Design

Inlet Sludge Consistency : 0.8 -1.0 %


Mixing arrangement of Polyelectrolyte and

sludge

: Online-mixing


solution to the incoming sludge at entrance to the belt filter press. The supernatant

from Belt Filter shall be taken by gravity to Wet Well of MPS/Inlet of STP. The pipes

below Ground shall be RCC NP-3, with HDPE lining, whereas the pipes above

ground shall be of SS-304. Combo unit including Mechanical Thickener and Belt filter

press shall be capable of handling sludge consisting of minimum 0.8% solids by

weight. The dewatered cake shall be based on minimum consistency of 20% by

weight dry solids. MOC shall be SS-304. General Equipment furnished and installed

under this section shall be fabricated, assembled, erected and placed in proper

operating condition in full conformity with the drawings, specifications, engineering

data, instructions, and recommendations of the equipment manufacturer, unless the

engineer notes exceptions.


129

Workmanship and design: All components of the sludge dewatering equipment

shall be engineered for long, continuous, and uninterrupted service. The unit shall be

fully enclosed “multi-stage” type comprised with three belts. Gravity section shall be


pneumatic components shall be located on periphery of the frame allowing easy

access for the operator for overhauls. Sufficient number of removable inspection

hatches shall be located on each side of the unit to observe the factions of the unit.

The sludge dewatering system shall consist of belt filter press (es) and all

appurtenances. Each belt filter press shall be a fully enclosed having monologue

frame construction, complete prefabricated unit consisting of at least a sludge

conditioning system, a gravity drainage section, a pressure section, a belt alignment

and tensioning system and a belt washing system. Only units having an effective belt

width of 1.0– 3.0 meter shall be considered acceptable under this specification. The

unit(s) shall be the “multi-stage” Belt Filter Press (es) type.

7.8. Manual and Auto Valves / Gates


7.8.1 Chain Pulley Block, Mono Rail, Electric Hoists

Mono Rails This includes supply, erection, testing and commissioning of adequate capacity mono rails.

Lifting electric hoist arrangement for various unit of STP This includes supply, erection, testing and commissioning of lifting equipment with all accessories suitable in various units of the STP.

Sr. No.

Description of unit

Type of lifting Type of movements

5. Dewatering mechanism


Two movements e.g. vertical, and Transverse

6. Sludge Pump House


A chain pulley block of adequate capacity

7. Tonner shed Electric operated hoist

Two-way movements e.g. vertical, Transverse

8. Raw Sewage Pumping Station



The above list is indicative. Actual required / Installation capacity of Electric Hoist,

shall vary as per process requirement, which shall be approved by Engineer-in-

charge.

Chain Pulley Blocks

This includes supply, erection, testing and commissioning of adequate capacity chain

pulley block with all the accessories. It should be compatible with the lifting chain of

the pump.


130


7.8.2 Sludge Pump House(s)


structure. Minimum height of the pump house shall be 4 m from the plinth level. It

shall be provided with rolling shutter and doors and windows. A chain pulley block of



make as directed by Engineer-in-Charge. The pump house shall house:




7.8.3 Chemical Dosing Tanks


to be provided.








Centrifuge.

Dosing Tanks:



Hydraulic Retention Time: Suitable for min. 8 hours of Operation Free Board

Dosing Pumps : As per design.



Pump



7.8.4 Civil Structure for Mechanical De-watering including










7.8.5 Sludge Storage Platform


131






7.9. Operations Buildings

7.9.1 Office, PLC Room etc.

The building shall be constructed to house the following as a minimum:

i. PLC/Main LT (MCC) Room –as required

ii. Office rooms for the officers and staff with Lavatory cum Toilet block of

required size/area along with sanitary fittings as decided by the Engineer –in-

Charge.

- One passage app. 2m wide.

iii. Workshop cum Tool Room

iv. Stair case up to terrace will be provided.

The height of ceiling shall be minimum 3.5 M from the floor level or higher to

suit the requirement. Adequate no. of toilets and wash basin shall be

provided separately for men and women and a separate toilet attached to the

office room shall be provided. A covered service water overhead tank of

capacity 5 cum shall be provided to cater to the water requirement of building

and process requirement.

Office Building/Admin Building Rooms

The Existing Administrative Block & laboratory for UASB based Sewage Treatment

Plant may be used after renovation/repair & painting.

7.9.2 Blower Room



requirements. Minimum space on other three sides of blower room will be 1.5 m from

the blowers. The blower room shall have sufficient ventilation, lighting and working

space. Control panels for air blower shall be placed in air conditioned room, in

blower room, if required. The room will be equipped with sufficient capacity EOT

lifting arrangement to facilitate removal of blower/motor etc. for repairs. The room will

also have rolling shutter or aluminium glazed doors and windows.


The bidder shall have to construct two Nos. Single storey quarters for the operational

staff. The covered area shall have 80 m2 each. The provision in the staff quarter

consists of one bedroom, one drawing cum dinning, kitchen, store and toilet. The

construction material for walls shall be brick work in Cement Sand mortar 1:5, RCC

roof slab shall be (M 25). The door and windows shall be of commercial hollock wood.


One toilet block for operators, one guard room with toilet and one meter room of

sufficient size as approved by Engineer-in-Charge shall be constructed.


132

7.9.5 Painting specifications common to all the buildings

Sr.

No

Description Specifications


2 Plaster



iii Roof including cantilevers Cement Mortar 1:3, 10 mm thick

3 Painting



4 Dado/ Skirting Same material as on flooring 2.10 m high

in toilet block and 0.15 m high in all other

rooms / spaces

5 Doors / windows Aluminum

7.9.6 Schedule of Finishes

Sr.

No.


Ventilators

1 MCC Room, PLC &

Control Room


approved make. The


shall be min 600 mm

x 600 mm & thickness

min – 12 mm

Solid Core

Flush Door

with heavy

duty Brass

Fittings of

approved

make

Aluminium of

approved

make


Room, Workshop &

Tool Room, Chlorinator

cum Chlorine Tonner

House, Thickener

Dilution Water Pump



IPS Flooring with

Abrasion Resistant


make

MS Rolling

Shutter

of

approved

make

Aluminium of

approved

make



Anti -Skid Tile

Flooring of approved

make

--- ---


Heavy Duty Paving

Blocks with Lacquer

Finish

--- ---


approved

make

UPVC of

approved make


133

Sr.

No.


Ventilators

6 Staircase: Inside

Building


of approved make

--- ---



along with an Underground Water Tank of capacity minimum 10 m3 to cater to the

water requirements of the Building

In addition, the Building shall be provided with Passages, Wooden/Aluminium/Glass



Rooms/Areas as per requirement or as per instructions of the Engineer-in-charge.

Internal & External Plaster with Painting shall be done as per instructions of the

Engineer-in-charge. Plinth Protection shall be provided along the periphery as per

specifications.


7.10. SUB STATION (HT METER ROOM, HT PANEL ROOM, TRANSFOMER, PCC &

MCC PANEL ROOM)





shall be installed in open adjacent to Sub-Station building covered with fence and

gate with fire wall between two transformers as per IE rules and PSPCL norms.

Location of HT Meter Room shall be as per PSPCL norms.

Sub-Station building shall be RCC (M25) Frame and Brick Masonry Structure

Sr.

No.

Item of work Work


PLC/Control Room

2 Nos. of latest version & configuration complete.


Room



3 Telecommunication

Facility




4 Plant Model 1 No. Wall Mounted Process Model (Electronic

Plant Display Model) with Flow Diagram

(Minimum size 3 m x 1.5m)


and lighting.

5 Air Conditioner Adequate nos. of Air conditioners shall be provided

as directed by Executive Engineer.


134

equipped with Rolling Shutters, Windows/Ventilators, Exhaust Fans and Safety

Equipment’s including Sand Buckets, Fire Extinguishers and Fire Alarms etc.

complete as per PSPCL norms and IE rules. Also it shall be provided with IPS

Flooring, Internal and External Plaster with Painting and Plinth Protection along the

periphery as per specifications.

DG Set Area

The DG Set area with shed, foundation for DG, Safety Equipment’s including Sand


accommodate DG Set including AMF Panel, Fuel Tank and other Accessories. DG

Set shall cater to entire load of STP and average flow plus other misc. load of MPS.

Separate DG Set shall be provided for STP and MPS. Multiple units of DG sets can

be provided for STP.

7.11. Process piping / drain piping/ channels

This shall include inter connecting pipelines / channels between different units of

STP and fulfillment of contract limits.


Combination of pipes and channels can be used for conveyance of waste

water as per requirement of site conditions.




No., Flow, Size, Type, Material of Construction etc. with detailed P & ID for approval of

the Engineer-in-charge prior to any further engineering or procurement/fabrication and

installation.

Generally, the Material of Construction shall be selected based on the following guide

lines. The Tenderer can make suitable selection depending on Service, Type of Flow

(i.e. Gravity or Pressurized) and Diameter of Pipe.

Sr. No.

Service Design

Velocity m/s Limitations



2 Pressure Lines for Sewage &Water

0.6 – 1.5



5 Chemical Feed Lines 0.6 – 1.5 Irrespective of flow, Diameter shall not less than 20 mm.


135


Valve: Guide Line

Sr.

No.


Connection

A Sewage / Sludge

1

Gravity /

Pressurized


Gate & SS 410

Spindle

Flanged


Internals

Wafer

3


Pump


Gate & SS 410

Spindle

Flanged

B Service Water

1 Gravity /

Pressurized

Ball CS Body & SS 304

Internals

Flanged

Sr.

No. Service Type of Flow MOC

1 Waste Water / Sludge Gravity RCC NP-3 Class with HDPE

lining / DI-K9

2 Waste Water / Sludge Pressurized CI / DI K-9


Pressurized

Inside Room – CPVC /MDPE /

GI



4

Air Lines: Headers,

Vertical Down-comers Pressurized

Above Water: MS "C" Class,

Sand Blasted and Epoxy

Painted

Under Water: SS 304

Under Ground : MS with

Coating and Wrapping

In Blower Room: Pipe

Insulation with Resin Bonded

Glass wool in Rigid Board.

Kindly refer detail Mechanical

specifications.

5a Air Grid Piping: Aeration

Zone Pressurized UPVC Schedule 40

5b Air Grid Piping: Selector

Zone Pressurized SS 304


Pressurized

SS 304 except Chlorine &

FeCl3


Pressurized Schedule 40 UPVC


136

Sr.

No.


Connection


Internals

Wafer


Pump


Internals

Flanged

C Air


Internals

Flanged

2 Delivery of Blower Swing Check CS Body & SS 304

Internals

Wafer


Blower


Internals

Flanged

D Chemicals

1a Gravity /

Pressurized

Ball As per Chemical

Compatibility Chart

Flanged

1b Gravity /

Pressurized

Diaphragm As per Chemical

Compatibility Chart

Flanged

1c Gravity /

Pressurized

Plug As per Chemical

Compatibility Chart

Flanged


Flow, Size, Type, Material of Construction, End Connection etc. with detailed P &ID

for approval prior to any further engineering or procurement/fabrication and

installation.

7.12. Security Cabin

Security Cabin of size 4.00 m x 3.00 m with washroom shall be provided at entry Gate

of the Plant. It shall be RCC (M25) Frame and Brick Masonry Structure equipped with

Doors, Windows/Ventilators, etc. complete. Also, it shall be provided with Flooring,

Internal and External Plaster with Painting and Plinth Protection along the periphery

as per specifications.

7.13. Site Development


around structures, top level of roads/pavements, lawns, landscaping etc. Lawns

should be 15 cm below top level of roads and pavements.

7.13.1. Roads & Pavement


every unit of the constructed works. These roads and footpaths shall be 4.2 m and

2.2m wide respectively. The roads/pavements shall be made of paver blocks. Cement

Concrete Kerb & Channel (1:2:4) shall be provided on both sides of the road. The

Kerb & Channel shall be 30 cm x 60 cm x 10 cm. Dowel shall be provided on both

side of the road with earth filling in proper slope and compaction as per direction of

Engineer-in-Charge.


137

7.13.2. Sewerage System, Drainage System and Storm Water System


inlet chamber and other units shall be carried through RCC Pipe / UPVC Pipe upto

inlet chamber of STP/MPS. This may require provision of pumping arrangement.





bidder and approved by Engineer-in-Charge before execution of the work. The

bedding and haunches of pipes shall be as per the specifications approved by the

Engineer-in-Charge.


plant area.

7.13.3. Water Supply Arrangement

The bidder shall provide internal water supply scheme in the plant area. The main

water supply lines shall be of suitable size and of Ductile Iron (K-7) Pipe. However,

service connection to buildings / equipment / process units will be of MDPE/CPVC/

G.I. Class B. The supply of water shall be made through small tube-well to be bored

within the plant area. The bidder shall have to provide complete water supply system

including underground water storage tank of suitable capacity (subject to minimum of

20 Cum) and overhead tanks wherever required. The water supply system shall

include making provision of hydrants / nozzles for washing of the various units /

pipelines. A booster pump of suitable capacity shall be provided for pumping the

water to above said units. Provision for all required pipes, specials, overflow pipes

and bell cock sluice valves shall also be included.

Small Tube well: It shall consist of a bore of suitable size and depth with PVC casing

pipe / filter housing a submersible pump set of suitable capacity complete in all

respect for pumping out water to meet the requirement of plant operation, watering of

plants, cleaning and staff requirement for daily use. Water should be suitable for

construction and drinking purposes.

7.13.4. Rain water harvesting

Roof top rain water harvesting is to be done for all the buildings. The system shall

confirm to the details and specifications in the relevant document published by

Central Ground Water Board, Ministry of Water Resources to be stipulated. The

following technical criteria, to be taken into consideration while designing rain water

harvesting system.

Hydrogeology of the area, nature and aerial extent of the aquifers

Nature and type of soil cover

Quantity and intensity of rainfall specially one hour peak rainfall

Clogging potential i.e. silt content of source water

Topography / applicable methods (infection or infiltration)

All recharge structures shall be designed based on availability of space, run

off, depth of water table and lithology of the area.

General methods to be adopted are described below:

Rain water from roof of building should be collected at one or more places through

rain water drain pipes extended up to the bottom of the building. Then collected water


138

should be diverted into a sump called filter chamber of required size and from sump

to recharging pits or other components through RCC pipe of required size and

thickness / strength. The bottom half of the filter chamber has to be filled with broken

bricks / pebbles and followed by a layer of coarse sand. A nylon mesh has to be

provided in between the two layers. The top portion of filter chamber should be

covered with RCC slab. The inlet rain water drain pipe should be on the top of the

filter chamber and outlet pipe connecting the filter chamber to the recharging structure

should be at the bottom. One filter chamber should not be connected to more than 22

square meter area of roof of any building. The rain water then should be diverted

towards recharging structure which may be of following types.

Recharging Pits

In alluvial area where permeable rocks are exposed on the land surface or at

very shallow depth, roof top rain water harvesting can be done through

recharge pits.

This technique is suitable for buildings having a roof area of 100 square

meters and is constructed for recharging the shallow aquifers.

Recharge Pits may be of any shape and size and shall generally be

constructed 1 m to 2 m wide and 2 m to 3 m deep which shall be back filled

with boulders (5-20 cm), gravels (5-10 mm) and coarse sand (1.5-2 mm) in

graded from-Boulders at the bottom, gravels in between and coarse sand at

the top. For smaller roof area, pit may be filled with broken bricks / cobbles.

A mesh should be provided at the roof so that leaves or any other solid waste /

debris is prevented from entering the filter chamber / pit.

Recharge Trench

Recharge trenches are suitable for buildings having roof area of 200-300 square

meter and where permeable strata are available at shallow depths.

Trench may be 0.5 to 1 meter wide, 1 to 1.5 meter deep and 10 to 20 meter long

depending upon availability of water to be recharged and available land.

These recharge trenches shall be back filled with boulders (5-20 cm), gravels (5-10

mm) and coarse sand (1.5 to 2 mm) in graded form- boulders at the bottom,

gravel in between and coarse sand at the top.

A mesh should be provided at the roof so that leaves or any other solid waste /

debris is prevented from entering the filter chamber / trench.

Trench with recharge well

In areas where the surface soil is impervious and large quantities of roof water is

available within a very short period of heavy rainfall, the use of trench / pits is

made to store the water in a filter media and subsequently recharge to ground

water through specially constructed recharge wells.

This technique is ideally suited for areas where permeable horizon is within 3 m

below ground level.

Recharge well of 100-300 mm diameter is constructed to a depth of at least 3 m to

5 m below the water level. Based on the lithology of the areas, well assembly

should be designed with slotted pipe against the shallow and deeper aquifer.

A lateral trench of 1.5m to 3m width and 10m to 30m length, depending upon the

availability of water is constructed with the recharge well in center.


139

The number of recharge wells in the trench can be decided on the basis of water

availability and local vertical permeability of the soil.

The trench is backfilled with boulders, gravels and coarse sand to act as a filter

media for the recharge wells.

If the aquifer is available at greater depth say more than 20m, a shallow shaft of

2m to 5m diameter and 3-5 meters deep may be constructed depending upon

availability of runoff. Inside the shaft a recharge well of 100mm-300mm dia. is

constructed for recharging the available water to the deeper aquifers. At the

bottom of the shaft a filter media is provided to avoid choking of recharge well.

Bye-pass arrangement with provision of suitable valve shall be installed in the rain

water drain pipe just before every filter chamber to reject the first shower.

7.14. Disposal of treated effluent

7.14.1. Treated Effluent Channel / Pipe










7.15. Miscellaneous

7.15.1 Stairs





7.15.2 Railings


The railings shall consist of three horizontal rows of 40 mm i/d GI pipe, Class C


7.15.3 Painting, Whitewashing and Allied Works









Pipes and specials


140



7.15.4 Lowering of ground water table during construction



7.16. Electrical & Instrumentation Works




necessary liasoning for the same shall be done by the Contractor in consultation with

Engineer-in-charge.






Obtaining incoming HT Power from PSPCL including necessary liasonoing,




HT Substation including 4-Pole Structure, HT Panel, Transformers, Power

Control Centre with APFC Capacitor Panel etc. complete.




LT Bus-Duct



Earthing for Electrical equipment as well as Instruments, PLC/SCADA.









CCTV System

Safety items (shock treatment chart, first aid box, CO2 fire extinguisher,

insulating mat, hand gloves, caution boards, LED signage, sand buckets,

discharge rods etc.)





141






7.17. PLC/PC/SCADA BASED AUTOMATION SYSTEM FOR ENTIRE PLANT


Logic Control (PLC) and Supervisory Control and Data Acquisition (SCADA). This shall

be achieved by either individual equipment PLCs with SCADA/HMI or single PLC and

SCADA for entire Sewage Treatment including pumping stations. Operation of primary

treatment units and sludge dewatering units shall be manual however indication of

operation of primary treatment units and sludge dewatering units shall be on

PLC/SCADA. These shall be located at control room of the STP.

The plant shall have provision for operations in following modes –

i) Automatic – Auto operation through PLC/digital controller.

ii) Manual – Operator intervention through SCADA/HMI.

iii) Local – Local operation through local control panel located near equipment.

a) Audio Visual Alarms Audio visual alarms shall be initiated under emergency or equipment trip conditions,


be as follows:

Dynamic display of all Units, equipment and drives shall be available on

SCADA screen.



Auto/Manual operation of each drive shall be made by selecting a soft switch


In Auto mode, each drive shall operate based on pre-set sequence and

interlock. Also automatic change over from working to standby drive shall

happen after a drive reaches pre-set hours of operation.

In Manual mode, each drive shall be operated in Local/Remote mode by

selecting a soft switch on SCADA/HMI screen. In Local mode, each drive shall

be operated from the Local Push Button Station (LPBS) located nearby. In

Remote mode, operation from LPBS shall be disabled and each drive shall be

operated manually from PLC. Also provision for working/standby selection of

drives by selecting a soft switch on SCADA screen shall be provided.


Open/Close indication of all Auto Sluice Gates and Auto Valves shall be

displayed on SCADA/HMI screen.

Annunciation & Alarm facility shall be available in PLC/HMI/SCADA. In the

event of a Fault, the symbol representing the equipment/drive shall continue

flashing on SCADA/HMI screen with equipment/drive description appearing at

bottom of the SCADA/HMI screen and electric Hooter shall continue blowing

until the Fault Alarm is acknowledged.



142








the system running.

Different alarms colours provide information on their priorities.


installation of surge voltage arresters or surge voltage filters, to ensure that internal and

external surge voltages do not impair the function of his parts of the system.


memory.


station for the measured values and messages. Exceeding of limit values or deviations

detected by the above checks must trigger an event and cause a message to be sent.


Integrated, detailed error message and fault detection concept with display on

the HMI/SCADA for quick localization of faults. The system operator must be

able to identify the fault from the error.









The process system (PLC, HMI/SCADA) shall be protected against power failure by

an uninterruptible power supply (UPS). When the critical charge state of the UPS is


b) Mode selector switch A mode selector switch is to be installed on the MCC or distribution board. It serves for




Automatic: In this position, only automatic operation is possible; the local switches

have no function (Except emergency stop).




143









switches should be installed if possible in one switch box or at least installed next

to one another.

Each local switch must be adequately labelled in plain text so that no operator

errors can occur.

c) PLC The automatic start-up of the whole system, sequential operations and the automatic





The interlocks of the individual process groups and their signaling must be performed

by the PLC.

A system must be selected which is sufficiently protected against external interference

in the supply, control and signaling lines. The aim is that the program can continue to

run without fault signals in the event of transient earth faults in the supply grid. In the

event of prolonged power failures, on the other hand, a controlled restart must be

triggered (under-voltage trip of the non-automatic circuit breaker).



PLC of individual equipment shall be selected to carry out necessary

operations without overloading the PLC memory.




Retentively shall be 100% to save the recorded data and saving the

programmed logic, other attributes connected with system for power & system

failure.

Change in programme / modifications to programme shall be possible by a

portable laptop.


HMI/SCADA system

The HMI system shall be designed as a minimum 6”, colour, touch-screen on the panel.

Whereas SCADA system must be computer based.

All displays must be designed by the Contractor with graphic sophistication and all texts

in the visualization system must be displayed in English.


144




When designing the user interface or the assignment of the function keys, attention must

be paid that the function key assignment remains the same in all sub-menus so that it is

possible to jump to another menu without first having to jump back to the main menu.


Operating mode


Start-up times

Shutdown times





or sub-menu.





The central SCADA shall generate various reports to analyse plant performance. The


d) Computer hardware and software All programs required for operation of the system must be correspondingly compatible.

The corresponding licenses must be supplied for the standard programs. The operating

systems must be agreed upon with the Client. Minimum requirements shall meet:

CPU

1. Processor Intel i 7 10th Gen




5. System memory

(RAM)

16 GB




9. Communication

ports


10. Graphic

accelerator

2 GB




Monitor



145




Complete Project shall operate in auto mode. As a minimum, following controls must

be considered in Bidder’s Control Philosophy:

1. Coarse screens


transmitter / level switch, across it; the same shall be operated on the basis of

set differential level in SCADA. Also if differential level is not reached for certain

time period, the screen shall be operated on the basis of set time in SCADA.




gates.


in PLC for auto operation of coarse screen.

2. Raw Sewage Sump and Pumps

The sump will employ an Ultrasonic level transmitter to measure level. The

combined operation of Raw Sewage Pumps will be dependent on rate of change

of level with reference to time. The selection of Auto/Manual and Working/Stand-

by shall be made available in SCADA. In manual mode the pump Start/Stop will

be done through SCADA screen.

A clamp on type Ultrasonic or Electromagnetic flow transmitter shall be provided

at common header of pumps for measurement of flow to sewage treatment plant.

PLC shall calculate instantaneous flow as well as cumulative flow, both shall be

displayed on SCADA.


in PLC for auto operation of Raw Sewage Pumps.

3. Inlet chamber

A clamp on type Ultrasonic flow transmitter shall be provided on rising main of

inlet chamber for measurement of flow coming to Sewage Treatment Plant. PLC

shall calculate instantaneous flow as well as cumulative flow, both shall be

displayed on SCADA.

4. Fine screens



level in SCADA. Also if level is not reached for certain time period, the screen

shall be operated on the basis set time in SCADA.




gates.


146


in PLC for auto operation of fine screen.

5. Grit Chambers

Each grit chamber will consist of Detroiter (1No.), Organic Return Pump (1No.)

and Screw Conveyor for grit removal (1No.). As such Detroiter, Organic Return

Pump and Screw Conveyor will not have auto operation; these will be started and

stopped from SCADA screen as required.


for operation of Grit chamber equipment.

6. Any Biological Unit

Complete operation and control of plant will be done through a separate PLC and




Treatment Plant.

Necessary interlocks, controls, alarms, report generation, etc. shall be

considered.

Each reactor shall be equipped with Level Transmitter, DO Transmitter for


7. Sludge sump and pump

An ultrasonic type level transmitter shall be used for measurement of level in

sludge sump.

Screw/ Reciprocating pumps will be used to feed sludge to mechanical

dewatering unit. These will operate as per level in sludge sump.


SCADA for sludge pumps. In manual mode the Start/Stop of pump will be done

from SCADA screen.



8. Tertiary Treatment and Chlorination tank


SCADA for booster pumps. In manual mode the Start/Stop of pump will be done

from SCADA screen. Though chlorinator will have standalone operation,

feedback for the equipment shall be taken to PLC and displayed SCADA for

monitoring purpose.



9. Centrifuge/ Belt Filter Press

The drives and instruments of mechanical dewatering unit shall be connected to

PLC for its auto operation. Starting of dewatering system will be a manual

process.


for auto operation of centrifuges.


147

8. Design parameters for ETP’s at Tajpura & Haibowal:

Design Basis:

Flow for New ETP: 2.25 MLD at Tajpura &3.75 MLD at Haibowal

Peak factor: 5

Raw Influent Quality of both ETP’s are similar:

An abstract of Raw Dairy Waste Characteristics is indicated in the following Table:

Sr. No.


1 pH 6.5 to 9

2 Biochemical Oxygen Demand

(BOD5) 2000

mg/l





The Bidder shall carry out the sampling tests of raw sewage by themselves to

ascertain the raw influent quality for treatment process. The Employer will not be

responsible for the above and no relaxation will be given to the guarantee conditions

of desired treated effluent quality. For design purposes the lower parameters than

the above mentioned parameter will not be allowed.

Treated Sewage Quality:

The Contractor shall design the process in such a way that the: (2.25 &3.75 MLD )

treated effluent quality attains the following limits or even better

Sr. No.


1 pH 6.5 – 8.5










cm 11 RSC (Residual Sodium Carbonate) ≤ 2.5 mg/l


148

Design requirement described here is in general for various Items. However design

requirement of only those Items shall be applicable which are required or provided at

site. If design requirement of any item is not described here then requirement as per

CPHEEO Manual / relevant IS code or prevalent as per the department practice will

be applicable as approved by Engineer-in-charge.

8.1. Raw Effluent Pumping Station in ETP Premises

8.1.1 Civil Works

Components of Main Pumping Station

1. Receiving Chamber 2. Screening Channel 3. Wet well/Collecting Tank 4. Panel Room 5. Roads & Pavements 6. Platform /Foundation for Diesel Generating Set &Transformer 7. Cable Trench, wire mesh around transformer

8. White washing/painting etc. 9. Hand Railing 10. Pumping main from IPS to inlet chamber of ETP 11. Valve chamber/platform to house common header, all valves, NRVs etc.


The gravity outfall channel will discharge the raw effluent into a Receiving chamber. The

function of the Receiving chamber is to distribute the flow for screens. The Receiving

Chamber shall be designed for peak flow. The Receiving chamber shall consist of sluice

gates on upstream for flow regulation. The receiving chamber shall be of adequate size

to meet the requirements of workability inside it. C.I gate (Manually Operated) of suitable

size shall be provided at the inlet of receiving chamber. The entire construction is in

minimum M-30 grade concrete and as per IS 3370. RCC access platform minimum 1200

mm wide with GI pipe railing as per specifications shall be provided on one side of the

chamber:

Peak Factor : 5.0


Detention period : 30 Sec at Peak Flow



Manual Trash screen to be installed in front of coarse mechanical screens to prevent

large and medium sized floating wastes from entering into intake structure of pumping

station.



provided should be with perforated basket at its bottom and guide roller on both sides for

easy removal. Guide channel extend upto to top of platform for guiding upward

movement. The height of trash screen should be 0.5 m above sewer crown. Material of

construction should be in SS-304. Flat size shall be of 10 mm thick 50mm wide:

Number of Units : 1 Manual (Working) of 100 % Peak Flow capacity


149

Velocity through Screen at Average Flow (m/sec)

: 0.6 maximum

Velocity through Screen at Peak Flow (m/sec)

: 1.2 maximum

Height of Mesh Screen : 0.50 m above sewer crown / Channel Full Supply Level


All other accessories, whether specified or not, but required for completeness of contract

shall be in contractor’s scope. GI Hand Railings shall be provided around the entire




provided.

iii) Coarse Screen

One mechanical screen working and one manual screen standby of 20 mm clear spacing

shall be provided with each screen designed for peak flow capacity.

The mechanical and manual bar screens shall be made of 10 mm thick Stainless Steel

(SS 304) flats respectively. The mechanical coarse screens shall be of Inclined Rake

Type of 20 mm opening as per the specifications detailed elsewhere in the bid document.

Bin and chute arrangement shall be provided for collection of screenings in a wheel

burrow/trolley. Manually operated CI gates are provided at the upstream and downstream

end to regulate the flow.


Railings shall be provided around the entire periphery of the platform. The entire structure

is to be in minimum M-30 concrete and as per IS 3370 including the platform. RCC

staircase 1200 mm wide shall be provided for access from the ground level to the top of

the unit & to the operating platform.

Flow

(MLD)

Peak

factor

J Type Thrash Screen

Mechanical coarse

Screens

Manual coarse

Screens

1 Tajpura 2.25 5.0 1 1 1

2 Haibowal 3.75 5.0 1 1 1

Peak factor : 5


(Standby) each of Peak Flow capacity

Flow Approach Velocity at Average Flow (m/sec) : 0.3 minimum

Velocity through Screen at Peak Flow (m/sec) : 1.2 maximum

Height of Screen bars upto dead plate : 1 m above sewer crown / FSL of

channel



shall be in contractor’s scope.

iv) WET WELL

The Main pumping station (MPS) shall be a rectangular / Circular concrete structure. The

sump well is to be in R.C.C of minimum Grade M-30 and shall be designed for peak flow.


150

The maximum operational liquid level in wet well shall be such that, Minimum 100mm

Freefall to be maintained from the Invert of Screen Chamber to Water level of wet well.

The capacity of the wet well sump should be kept such that the detention time of the sump

should be at least 5 minutes of peak flow. The wet well shall be divided into two equal

compartments upto full height with sluice gates in common wall.

The pumps shall be installed equally in two compartments. Area of gate(s) should be

sufficient so as to divide the flow into any of the compartments, at a velocity not more than

1.2 m/sec.

The arrangement of the Pumps shall be as per Manufacturer’s data i.e. Spacing between

the Pumps, minimum space between the Pump and Wall etc. Adequate submergence of

the pump shall be provided as per the manufactures recommendations. The size of wet

well shall be sufficient to accommodate one additional pump in each compartment, in

future.

RCC Staircase / Aluminium ladder from Top of wet well to the bottom of wet well shall be

provided.


Well.

Basis for Design

All underground or partly underground liquid containing structures shall be designed for

the following conditions:















v) Sewage Pumps

Coarse-screened effluent shall be pumped from wet well. Pump operation shall be


alarm and tripping system installed. It will house non clog submersible pumps, which will

always be submerged in sewage with minimum submergence as required by the

manufacturer. Pumps will have automatic coupling arrangement at discharge end, a guide

pipe and chain for easy removal and lowering of pumps. Vibration shall be limited as per


151

BS 4675 Part I.


Liquid : Raw Sewage



No of working Pumps : 4 Nos.


Standby Pumps : 50% of total capacity of working pumps





from columns.

vi) Rising main

Effluent from wet well will be pumped to ETP or to drain through rising main of size

suitable to carry peak flow:

Material of rising main: Cement lined DI (K9) pipe

Size of rising main : Capable of carrying peak flow

Velocity in rising main at peak flow : 1.5 m / sec

Flushing connections needs to be provided.



specials:

a) RCC Channels from inlet chamber of screens upto sump/ collecting tank.

b) DI K-9 Delivery line for individual pump upto common header.

c) Expander, Sluice valves, Bends, Non Return Valves in the individual delivery


d) DI K-9 Common header upto Inlet of ETP.

e) The size of pipe shall be calculated so as to meet the following velocity

criteria:-

Minimum Velocity : 0.60 m/sec

Maximum Velocity : 1.5 m/sec

f) All other required fittings such as bends, tees etc.

g) Thrust block of M-20 grade, for pipe support, etc.

h) Necessary bypass arrangement shall be provided to be used during the





be applied with two coats of Birla / JK Wall Putty followed by two coats of primer followed

by min two coats of first quality plastic emulsion paint.


152

All the structural steel, pipes, specials etc shall have two coats of Epidec RTC Primer


All the internal walls and base of water retaining structures of MPS shall be provided with

min two coats of coal tar epoxy.


Roads and Pathways shall be provided with interlocking paver blocks over 150 mm thick

and 100 mm thick respectively cement concrete of 1:4:8 in stone ballast. Thickness of

paver blocks on roads is 80 mm thick and on pathways the thickness of paver blocks is 60

mm. Paver blocks shall confirm to specification of code IS 15658 Paver blocks will be ISI

Marked.

x) MPS Panel Room


pumps, screens, sluice gates, valves etc. It shall also house PLC Panels and HMI screen

for display of various parameters of MPS. Preferably the MPS panel room building is to be

adjoining to the administrative building of ETP so as to have a better monitoring.




interlocking purposes. The stop push button shall be mushroom type with stay put feature

and lockable in pressed position to avoid accidental operation of drive from MCC, PLC

during shutdown.



8.1.2 Mechanical Works

1. J Type Manual Coarse screens, Manual and Mechanical Coarse Screen, Belt Conveyor for screens

2. CI Sluice Gate shall be provided at following locations for flow control

i. Inlet of Receiving Chamber-1 No. ii. Upstream of coarse screens of MPS – 2 Nos iii. Downstream of coarse screens of MPS – 2 Nos iv. RCC Partition Walls of Wet Well – 1 No v. Any other gate as required

3. Non clog Submersible Centrifugal Pump sets with motor 4. Piping works, Dismantling Joint, NRV, Sluice Valve with appurtenance 5. Lifting Arrangement –Monorail with Manual horizontal and vertical operation

8.1.3 Electrical, Instrumentation & Control Works

1 Electrical Panel with


b) Individual Starter Panels with VFD and soft starters for pumpset c) Automatic Power Factor Control (APFC) Capacitor Panel d) Alarm Annunciation Panel


153

e) Feeder for other loads f) Interface with PLC & SCADA compatibility

2 HT & LT Cable, Instrument & data cable 3 Cabling system 4 Earthing & Lightening Protection 5 Lighting System (Indoor & Outdoor) 6 Junction Box for cables 7 UPS for PLC 8 Instrumentation & Control

This includes supply, erection, testing and commissioning of various instruments & control

system. Brief details are as under:





1



2


Panel Room 1


requirement






rotation. Pumps operation shall be closely co-ordinated with ETPs sewage

requirement through ETP PLC/SCADA



Provision shall also be made for display of level and flow in ETP, SCADA Room.

Single PLC for MPS and ETP is preferred. Contractor is free to provide separate

PLC for MPS.

PLC to have provision for exporting data to external device.


154

8.2. ETP

i) Flow Measurement


main of raw sewage pumping station located at ETP area.

ii) Inlet Chamber



Min. Detention period :30 sec on peak flow


Following provisions shall also be to be made as per detailed design.



1 no. CI / DI double flanged Sluice Valves

CI/DI Horizontal pipe having length as per contract limits.

Minimum 150 mm i/d CI/DI pipes along with sluice valves for scouring

purposes.


One mechanical Step /MATT type Fine screen (working) with one manual (standby)

screens, followed by one Mechanical perforated (working) screen and one Manual

Mesh (working) screen are proposed in the screen chamber.

The screen channels shall be designed for peak flow.

RCC Platforms minimum 1.2 mt wide with hand railing shall be provided at suitable




Manual Standby

1 No. Perforated Mechanical Working

1 No. Mesh Screen Manual.


Flow (m/sec.)

: 0.6 maximum

Velocity through Screen at Peak

Flow (m/sec.)

: 1.2 maximum

Free board : Min 0.5m on upstream side of the

screen at maximum water level


Mechanical Fine Screen (working) of 6 mm opening, Mechanical Perforated

screen of 6 mm opening, Manual mesh screen of 5 mm opening shall be placed

in series.

Flow

(MLD)

Peak

factor

Mechanical Step/MATT

type screen

Mechanical Perforated Screens

Manual Mesh

Screens

Manual Fine

Screens

1 Tajpura 2.25 5.0 1 1 1 1

2 Haibowal 3.75 5.0 1

1 1 1


155


and as per IS 3370. RCC Platform/Walkway, minimum 1.20 m wide with G.I. Hand



Ground Level to the top of the Unit & to the Operating Platform/Walkway.

The clear spacing between two bars shall be 6 mm for Mechanical Fine Screen and 10

mm for Manual Fine Screen. The Mechanical and Manual Screens shall be made of SS


Each mechanical Fine screen shall be followed by perforated screen of 6mm opening

and Manual Mesh screen of 5 mm opening.

Minimum 3mm thick panels of stainless steel 304 construction shall incorporate 6mm

diameter perforations.


Screenings dropped from Chute shall be collected in a wheel Burrow. Manually

operated CI / Al Sluice Gates shall be provided at the upstream and downstream ends

to regulate the flow.

Detailed specifications of all mechanical bar screens are given in Mechanical Section.


Mechanical grit chambers are proposed after fine screen units. The mechanical grit

chambers shall be Square Mechanical Detritus Tank designed for each capable of

handling peak flow.

One Mechanical Grit Chamber (Working) and one Standby Mechanical Grit chamber

along with one Manual Bypass Channel Standby) shall be provided after Fine Screen

Channels. Each Grit Chamber shall be designed for Peak Flow and Bypass Channel

shall be designed for 100% of Peak Flow. The entire construction shall be in minimum

M-30 grade reinforced cement concrete and as per IS 3370. RCC Platform/Walkway,

minimum 1.20 m wide with G.I Hand Railing as per specifications shall be provided.

RCC Staircase, minimum 1.20 m wide with G.I Hand Railing as per specifications shall

be provided for access from Finished Ground Level to the top of the Unit & to the

Operating Platform/Walkway.


One tapered Inlet Channel running along one side with adjustable Influent

Deflectors for entry of sewage into the Grit Chamber.

One tapered Outlet Channel for collecting the de-gritted sewage, which

overflow over a adjustable Weir into the Outlet Channel. It shall be designed

in such a way that no settling takes place in it.

One sloping Grit Classifying Channel in to which the collected grit shall be

classified.

The grit from Classifier shall be collected in a Wheeled Trolley .




156


Manually Operated C.I. Sluice Gates shall be provided at entrance of the Inlet

Channel of the Grit Chambers as well as Bypass Channel to regulate the flow.

Peak Factor : 5

No. of Units : 1 Mechanical (Working) + 1 Mechanical

(Standby) + Manual (Standby) channel each

of 100% of Peak Flow capacity

Type : Mechanical



Maximum Surface

Overflow Rate : 650 m3/m2/day

Free Board : 0.5 m

Minimum Side Water Depth : 0.90 m

Wheel Barrow : 2 Nos. minimum


shall form the part of Bidder‘s Scope.


inlet.

v) Primary Clariflocculator

Flash Mixer with mixing arrangement needs to be provided.

Design and construction requirements:

Clariflocculator mechanism shall be suitable for installation in RCC tank as per

following specifications.


Surface Loading Rate at Average flow 30-40 m3/m2.day


/d/m2 (max.)










Size Suitable


operated

After physio chemical treatment the effluent shall be directed to Equalization Tank. All

wetted parts shall be SS 304 in Primary Clarifloculator.


157

vi) EQUALIZATION TANK

Equalization Tank shall be provided suitably in which sewage will equalize by providing

min. 8 hrs. retention time, with aeration grid and air blower of suitable capacity. The

pumped sewage from the Equalization tank shall be directed to ETP. Suitable number

of Blowers with SS 304 Grid shall be provided for Mixing of Influent.

All units upto primary treatment (Primary clarifloculator) shall be designed for peak

flow, after Equalization Tank all units shall be designed for Average flow.

Anaerobic Treatment

The screened & grit free sewage shall be directed to anaerobic biological treatment.

preferably UASB (Upflow Anaerobic Sludge Blanket) Reactor with min. HRT of 24 hrs.

Arrangement for safe collection of Biogas product during Anaerobic Treatment is must.

After UASB treatment the effluent shall be fed into the biological treatment unit to

remove BOD, COD, Suspended Solids, Biological Nitrogen and Phosphorous for

producing quality of treated effluent after Reactor to be guaranteed as per Table above

in tender.

8.3 BIOLOGICAL TREATMENT

8.3.1 Biological Reactors, Settling and Decanting System







Design parameters : All design parameters like, MLSS, HRT, F/M, DO level,

recirculation ratio etc. shall be as per CPHEEO manual

for the offered technology.





Any other

requirement

: As per bidder technology and design to meet the desired

outlet parameters.

8.3.2 General

The Sequential Batch Reactor (SBR) Process shall be an advanced activated sludge

process with in-built nitrification, de-nitrification and biological phosphorous removal.

The process shall utilize a Fill-and-Draw Reactor with complete-mix regime and

operating in true-batch mode. The complete process shall be divided into Cycles with

each Cycle is of duration of 3 – 6 hours. All the subsequent treatment Steps –

Fill/Aeration, Settling and Decanting must take place sequentially and independently

without overlapping. During Fill/Aeration phase, the sewage shall be filled into SBR

Basins and part of the treated sewage along with activated sludge shall be recycled

with the help of Recycle Pumps. Air shall be supplied for aeration with the help of Air

Blowers. During settling phase, the Filling/Aeration shall be stopped and the mixed


158

content shall be allowed to settle under perfect settling conditions. During Decanting

phase, the supernatant shall be removed form top with the help of Decanters and

excess sludge shall be wasted with the help of Waste Pumps. Cycle acceleration /

overlapping during Peak flow shall not be allowed. Bidder shall provide DO sensor, in

each aeration zone of SBR basin /preferably on header of RAS Pump.

8.3.3 Process Design

Sequential Batch Reactor (SBR) Units shall be installed and equipped for average

flow . The SBR Process shall have following independent steps without overlapping

each other:

Fill & Aeration

Settling (Sedimentation/Clarification)

Decanting (Draw)

Filling, during Settling or Decanting will not be acceptable.

Nos. of SBR Basins with adequate volume shall be provided. In addition,

0.50 m Free Board shall be provided to each Basin. Maximum Liquid Depth of each

Basin shall be restricted up to 6.0 m.

The system should work on a gravity influent condition. No influent / sewage

Equalization Tanks or flash filling is accepted.

The entire construction shall be in M30 grade reinforced cement concrete and as

per IS 3370. 5.4.8 RCC Platform/Walkway, minimum 1.20 m wide with G.I Hand

Railing as per specifications shall be provided. RCC Staircase, minimum 1.20 m

wide with G.I Hand Railing as per specifications shall be provided for access from


Plinth protection along periphery shall be provided as per technical specifications.

Cycle Time 3 to 6 hrs

MLSS 3500 to 5000 mg/l

MLVSS/MLSS 0.7

F/M Ratio (BOD) 0.1 to 0.15

Solids Retention Time Minimum 10 days

Free Board 0.5 m (Minimum)

BOD Oxidation Oxygen

Requirement

1.2 x Inlet BOD Load



Requirement

Oxygen Credit (from De-

Nitrification)

Oxygen release during denitrification =

2.86 mg O2/mgN

Max O2 credit of denitrification can be

only 50% of nitrification

Alpha value for Submerged

Diffuser

0.65 (Maximum)

Beta value for Submerged

Diffuser

0.95 (Maximum)




159


Type of aeration Energy efficient diffused aeration system.

Decanting Device

Type Moving Weir Type/Swing Down

Quantity Minimum 1.0 numbers of decanter per

basin

8.3.4 Decanting Device

The Decanter Device shall be Moving Weir Arm Device of SS304 with top

mounted Gear Box, Electric Drive, Scum Guard, Down comers, Collection Pipe,

Bearings.

Weir loading for each decanter shall not exceed 125 m3/hr/m of the inlet weir.

8.3.5 Aeration System


Fine Bubble Type, PU/ EPDM Membrane Diffusers shall be acceptable with


submerged, fine bubble / fine pore, high transfer efficiency, low maintenance and

non-buoyant type. Diffusers shall be tubular type. Complete Diffuser as a unit shall

be assembled at the manufacturing factory level. The grid supports shall of

adjustable type made of SS 304.

The Air Blower Arrangement shall be capable of handling Total Water Level and

Bottom Water Level operation conditions controlled by process sensors such as

DO, Temperature and Level.

Each set of Air Blowers shall have sufficient dedicated standby. All Air Blower

shall be provided with VFD.

The Air Blowers shall be Turbo or Roots Blower type and head for Air Blowers

shall be decided on the basis of S.O.R. of Diffusers and maximum Liquid Depth in

Basin duly considering the losses governing point of delivery (Diffusers) and the

Air Blowers. Air Blowers shall be complete with Motor and accessories like Base

Frame, Anti Vibratory Pad, Reactive Silencer, Non-Return Valve, Air Filter etc. as

per requirements. Further, Air Blowers shall have acoustic enclosure to ensure

that the noise level at 1.00 m from Air Blowers is below 85 db. The Air Blower

House shall have Rolling Shutter, Windows, Exhaust Fans, Safety Equipment with

sufficient Ventilation, Lighting and Working Space. It shall be equipped with

sufficient capacity Electrical Hoist with Travelling Trolley (Min. 3 Ton or 1.5 times

the weight of Air Blower whichever is more) or Manual Fork lift to facilitate removal

of Air Blower / other Accessory for repairs.

The operation of Aeration System shall include PLC based control. The operation

and speed of Air Blowers shall be automatically adjusted using parameters like

Oxygen Uptake Rate, Dissolved Oxygen and Temperature and Liquid Level in the

Basin such that the DO is supplied as per demand and power utilisation for

operation of Air Blowers is optimised.



Header/Ring Main shall be supported on saddles at suitable intervals or shall be

protected against external corrosion in case laid below ground. The Sub-header

shall have Auto Valves to facilitate switch over of Aeration Cycle from one Basin to


160

other by PLC. The Sub-header shall supply air to Fixed Type Diffuser Grids at

various locations through vertical Air Supply Pipes. These Air Supply Pipes above

water level shall be in MS, painted with corrosion resistant paint and below water

shall be in SS 304. All under water Lateral Pipes shall be of UPVC. Junctions

between horizontal Sub-header and vertical Air Supply Pipes shall be suitably

protected against corrosion due to dissimilar materials.


shall form part of Contractors scope.

8.3.6 Air Blowers

The air blower arrangement shall be capable of handling Total Water Level and Bottom

Water Level operation conditions, controlled by process sensors such as DO,

temperature and level.

All blowers including standby shall be operated through Variable Frequency Drive

(VFD). The blowers shall be Turbo/Positive displacement (roots) type, and head for

blowers shall be decided on the basis of Standard Oxygenation Rate of diffusers and

maximum liquid depth in tank duly considering the losses at governing point of delivery

(diffusers) and the blowers. The number of standby blower shall be minimum 50% (fifty

percent) of the number of working blowers. Blowers shall be complete with motor and

accessories like base frame, anti-vibratory pad, silencer, non-return valve, air filter etc.

as per requirements. Vibration due to operation of blowers should not damage the

structures. Further, blowers shall have acoustic enclosure to ensure that the noise level

at 1 m from blowers is below 85db.

The blower shall be operated through PLC on variable frequency drives and capable to

operate at different speeds as per requirement of the system.

The header / rising main shall be adequately supported at suitable intervals. The sub

header shall have auto valves to facilitate switch of aeration cycle from one reactor to

other by PLC operation. The header shall supply air to reactor at various locations

through air supply pipes. Air supply pipe above water level shall be in MS and below

water level it shall be SS-304. All under water Grid Lateral Pipes shall be of UPVC.

Blower details:-

MOC : CI

Type : Tri lobe type



No. of units : As per design requirement

Head for blowers shall be decided on the basis of S.O.R. of diffusers and

maximum liquid depth in Basin duly considering the losses governing point of

delivery (diffusers) and the blowers

The operation of Aeration System shall include PLC based control. The operation

and speed of Air Blowers shall be automatically adjusted using parameters like

Oxygen Uptake Rate, Dissolved Oxygen and Temperature and Liquid Level in the

Basin such that the DO is supplied as per demand and power utilisation for

operation of Air Blowers is optimised.


with corrosion resistant paint as per Manufacture's recommendations. The Air

Header/Ring Main shall be supported on saddles at suitable intervals or shall be


161

protected against external corrosion in case laid below ground. The Sub-header

shall have Auto Valves to facilitate switch over of Aeration Cycle from one Basin to

other by PLC. The Sub-header shall supply air to fixed type Diffuser Grid through

vertical Air Supply Pipes. These Air Supply Pipes above water level shall be in

MS, painted with corrosion resistant paint and below water shall be in SS 304. All


header and vertical Air Supply Pipes shall be suitably protected against corrosion

due to dissimilar materials.

The Air Blower House shall have Rolling Shutter, Windows, Exhaust Fans, Safety

Equipment with sufficient Ventilation, Lighting and Working Space. It shall be

equipped with Forklift of suitable capacity or Electrical Hoist with Travelling Trolley

to facilitate lifting / removal / transportation of Air Blower for repair and

maintenance, if required.

Air Blowers for Biological Treatment (Roots or Turbo Type)

Blower details:-

Type : Turbo / Roots type



No. of units : As per design requirement

8.3.7 Return Sludge and Excess Sludge Pumps


Capacity and Head : As per requirements

Type : Submersible / Horizontal Centrifugal

Liquid : Biological Sludge of 0.8 – 1% solids consistency

Specific Gravity : 1.05

Solid size : 40 mm (Maximum)

Temperature : Min. 25 C

Efficiency : more than 60%

Quantity : 1 No. per Basin + 1 No. Store Standby


Capacity and Head : As per requirements

Type : Submersible / Horizontal Centrifugal

Liquid : Biological Sludge of 0.8 – 1% solids consistency


Solid size : 40 mm (Maximum)

Temperature : Min. 25 C

Efficiency : more than 60%

Quantity : 1 No. per Basin + 1 No. Store Standby

8.3.8 Automation and Control for Biological Reactor

a) PLC based Automation System with application software based on Rockwell or

equivalent to control Reactor System including all Gates, Air Blowers, Pumps,

Valves and Decanters as per Bidder’s/Technology Provider’s own design including

I/Os with 20 % Spares and UPS.

b) HMI Panel shall comprise latest Personal Computer with 22” LCD Monitor, Multi

Media Kit, Printer, Internet Connection, RS-View, RS-Links (Gateway Version),


162

Process and Operator Software with dynamic Flow Charts, Pictures, Screens,

Alarms, Historical Trends, Reports etc.

c) SCADA based Automation System to monitor the following parameters continuously

in each Reactors:

Fill Volume

Discharge Volume

Temperature

DO Level

Oxygen Uptake Rate

Air Blower Speed

Decanter Speed

d) Effluent from Reactor after biological treatment shall be fed to Tertiary treatment,

which consist of Flash mixer, flocculator and Filtration system. Chemicals can be

dosed for better coagulation and flocculation pre filtration.

8.4 Fiber Disc filter (FDF)

Tertiary Treatment Plant shall be designed for average flow and provided in the form of

Disc filters which shall consists of following:-

• Civil (RCC) Tank to house the Fibre Disc filter


• Drive Assembly

• Backwash System



8.4.1 Disc filter assembly with Filter Cloth


manufacturer). Each Disc shall be subdivided into smaller sections to constitute a prefab

disc frame (module) so as to ensure easy replacement and maintenance. Each disc

consists of multiple panels. In case of replacement of fibre cloth, the left and right of the

fibre cloth shall be replaced quickly without disassembling of segments (Disc frames).

Each disc shall be mounted on the centre drum by strap band (steel band) for the exact

roundness and it shall not be fixed by Stud bolts. The additional sealing material shall

not be needed for assembling of filter cloth to segment and the fibre cloth itself shall be

acted as the sealing material. Filter cloth shall envelop some parts of backside of filter

frame and the several springs shall be used to fix the filter cloth. The drum shall be

round type and shall have the enough area in order to discharge the treated water

without trouble. The material of the filter cloth shall be polyester; the filter frame that fixes

the filter cloth, the disc frame and the segment cover shall be ABS resin. Central drum

shall be SS304. Maximum Filtration rate shall be 10-12m3/m2/hr. Nominal pore size of

filter cloth shall be approx. 10 micron.

Filter shall be designed for average flow or decant flow whichever is higher. Suitable no.

of units shall be provided. Raw water shall flow into the respective Disc filter by gravity.

The structure shall ensure that Suspended Solids (SS) are filtered (treated) from outside

to inside of the filter cloth installed on both sides of the disc filter, and that filtered water

is discharged through the centre drum to the treated waterway.


163

Sr



type









(mm) As per design




a) Drive Assembly:



transmitted by the SS 304 chain. The reduction gear shall be installed on the base for

access f or the tension adjustment. A protective cover made of SS304 shall be

equipped for the drive motor, reduction gear and the chain. The rpm of the disc filter

drive shall be adjustable by the inverter that is attached in the field control panel.

b) Backwash system

Cleaning device consists of Suction cleaning unit, which conducts the suction cleaning

in the each side of disc, the automatic valve and the suction cleaning pump. Cleaning

device shall clean the contaminated filter cloth thoroughly by the suction unit on both

side of disc with automatic valve and suction cleaning pump which shall be activated by

the water level switch that contacts the water level raised with the increase of the loss

of head. Disc filter should be operated for filtration without the stop during backwash

and suction of sludge. Suction cleaning unit shall be made of or the even cleaning

efficiency without dead zone for all area of filter cloth.




c) Control panel & Instruments

Control panel shall be SS304, double door (Inner & outer door), IP55, self- standing,

floor-mounted type in case if it is outdoor. Indoor control panels shall be CRCA, powder

coated and self- standing, floor-mounted type. Control panel shall contain PLC, HMI

(6”, colour, touch screen), circuit breaker, relay, terminal blocks, push button switch,

indication lamp, etc. on the door. Control panel shall accommodate an inverter/VFD to

control the rotation velocity of the disc drive. Automatic/Manual switch and indication

lamp shall be equipped in case of breakdown of the automatic interlocking device.


164

Control panel shall have a nameplate displaying the name of the equipment; operation

switch shall have a nameplate indicating its intended use.

8.5 Disinfection System



Chlorine Tonner House shall be designed for Average Flow or Decant Flow whichever

is higher.

8.5.1 Chlorination Tank and Chlorinator cum Chlorine Tonner House

Treated sewage after filtration process unit shall be taken to Chlorination Tank by RCC

Channel/DI K-9 pipe. Gas Chlorine shall be added for disinfection at suitable dosing

rate. Baffle walls shall be provided in the Tank to facilitate hydraulic mixing of treated

sewage. The entire construction shall be in minimum M-30 grade reinforced cement

concrete and as per IS 3370.






Tank to house Chlorination Systems. It shall be RCC (M25) Frame cum Brick Masonry

Structure with Rolling Shutter, Windows & Ventilators, Electrical Hoist with Electrical

Travelling Trolley of minimum 3 Ton capacity or 1.5 times the weight of the single Unit

whichever is more to lift the Pumps/Chlorine Tonners and Safety Equipment including

Sand Buckets, Fire Extinguishers and Fire Alarms etc. Also it shall be provided with

IPS Flooring, Internal & External Plaster and Internal & External Painting. Plinth

Protection shall be provided along the periphery as per specifications.



8.5.2 Chlorination System



Empty Chlorine Tonners (Suitable for 30 days’ Storage) with Trunions, Lifting Device


Exhaust Fan, Canisters, Gasmasks etc.), Mandatory Spares, Chlorine Leak Detection

and Chlorine Leak Absorption System including FRP Half Hoods, Caustic Solution

Tank, Caustic Recirculation Pump, Centrifugal Fan, Interconnecting Piping and Ducts

complete and other required ancillary shall be provided. The system must have the

provision for linking its operation to PLC of STP so that quantity of chlorine usage can

be varied automatically as per treated water flow from biological reactor.


Type : Vacuum Type

Capacity of Chlorinator : Suitable as per design

Quantity of Chlorinator : 2 Nos. (1 Working + 1 Standby)


165




RCC pipe.

8.6 Sludge Handling System

8.6.1 Sludge withdrawal from various units.


preferably used for transportation of sludge. Primary Sludge withdrawn from

Clariflocculator units shall be collected in a sludge sump and shall be fed to dewatering

machine. Sludge Collected from UASB and Biological Reactor shall be collected in

sludge sump and shall be fed to dewatering machines.

8.6.2 Sludge Sump

Sludge sump shall be provided to collect the excess sludge from various units. Sludge

Sump and Dewatering Handling units shall be separate for Primary and Secondary

Sludge.

The Sump shall be equipped with coarse Bubble Air Grid made from stainless steel

pipes to facilitate mixing of contents of sludge sump on continuous basis. Alternatively

Submersible mixers of suitable numbers can be provided


Free Board : 0.5 m


sludge production

Minimum SWD : 3.0 m


8.6.3 Sludge Pumps

Sludge Transfer Pumps shall be provided to feed sludge to sludge dewatering units.

The pump shall be suitable for handling biological sludge. All pumps including standby

shall be installed.

Pumps Capacity and Head : Sufficient for handling total daily sludge in 18 hours

Type : Submersible sewage pump

Liquid : Bio-sludge for thickener and dewatering machine.

Solid Size handling : 40 mm (Maximum)


Efficiency : More than 60%

Installation : Fixed

Quantity : Minimum 2 no. (1W + 1S) for dewatering mechanism feeding


166

8.6.4 Centrifuge Units

The centrifuge shall be solid bowl centrifuge of co-current / counter current design. The

centrifuge shall have sufficient clarifying length and differential RPM so that separation

of solids is effective. The centrifuge shall have central lubrication system. The centrifuge

and its accessories shall be mounted on a common base frame so that entire assembly

can be installed on an elevated structure.

Suitable drive with V-belt arrangement and turbo-coupling shall be provided along with

overload protection device. Centrifuge shall be with SS-304 wetted parts.





with anti-vibration pads. All steps necessary to prevent transmission of structure borne

noise shall be taken. Adequate sound proofing shall be carried out.

A suitable hoist shall be provided above centrifuge machines for maintenance purpose.

The hoist shall be such that it shall be possible to erect or de-erect the centrifuge while

one is in operation.

Number of centrifuges : At least 2 Nos. (1W + 1 SB)

Type : Horizontal

Operating Hours : 18 hrs. per day maximum

Mixing arrangement of Polyelectrolyte and sludge

: Online mixing

Dewatering polyelectrolyte dosing system is to be provided to dose poly electrolyte


8.6.5 Combined Belt Thickener cum Belt filter press units

The Sludge Dewatering Device shall consist of combo units which includes Mechanical

Thickener and Belt Filter Press along with all appurtenances. It shall be designed to

adequately condition and dewater the sludge so that the dewatered sludge cake is

produced that easily discharges from the Belt Filter Press. Flocculator arrangement in

SS-304 of suitable capacity shall be provided at the inlet of each Belt Filter Press for

mixing of sludge and DWPE. All other accessories, whether specified or not, but

required for complete operation shall form part of contractors scope.


Operating Hour : 18 hours per day maximum Design

Inlet Sludge Consistency : 0.8-1.0 %


Mixing arrangement of Polyelectrolyte and

sludge

: Online-mixing


167


solution to the incoming sludge at entrance to the belt filter press. The supernatant from

Belt Filter shall be taken by gravity to Wet Well of MPS/Inlet of STP. The pipes below

Ground shall be RCC NP-3, with HDPE lining, whereas the pipes above ground shall be

of SS-304. Combo unit including Mechanical Thickener and Belt filter press shall be

capable of handling sludge consisting of minimum 0.8% solids by weight. The

dewatered cake shall be based on minimum consistency of 20% by weight dry solids.

MOC shall be SS-304. General Equipment furnished and installed under this section

shall be fabricated, assembled, erected and placed in proper operating condition in full

conformity with the drawings, specifications, engineering data, instructions, and

recommendations of the equipment manufacturer, unless the engineer notes

exceptions.

Workmanship and design: All components of the sludge dewatering equipment shall

be engineered for long, continuous, and uninterrupted service. The unit shall be fully

enclosed “multi-stage” type comprised with three belts. Gravity section shall be


pneumatic components shall be located on periphery of the frame allowing easy access

for the operator for overhauls. Sufficient number of removable inspection hatches shall

be located on each side of the unit to observe the factions of the unit. The sludge

dewatering system shall consist of belt filter press (es) and all appurtenances. Each belt

filter press shall be a fully enclosed having monologue frame construction, complete

prefabricated unit consisting of at least a sludge conditioning system, a gravity drainage

section, a pressure section, a belt alignment and tensioning system and a belt washing

system. Only units having an effective belt width of 1.0– 3.0 meter shall be considered

acceptable under this specification. The unit(s) shall be the “multi-stage” Belt Filter

Press (es) type.

8.7 Manual and Auto Valves / Gates


8.7.1 Chain Pulley Block, Mono Rail, Electric Hoists

Mono Rails

This includes supply, erection, testing and commissioning of adequate capacity mono rails.

Lifting electric hoist arrangement for various unit of ETP

This includes supply, erection, testing and commissioning of lifting equipment with all accessories suitable in various units of the ETP

Sr. No.

Description of unit

Type of lifting

Type of movements Capacity

1 Blower room Electric operated hoist


Minimum 1.5 times the weight of blower/motor

2 Dewatering mechanism



Minimum 1.5 times the weight to be lifted.


168

Sr. No.

Description of unit

Type of lifting

Type of movements Capacity

3 Sludge Pump House

Manual operated hoist

Chain Pulley Block/ Monorail

of adequate capacity

Minimum 1.5 times the weight to be lifted.

4 Tonner shed Electric operated hoist


Minimum 3.0 ton capacity

5 Raw Sewage Pumping Station

Manual operated hoist


Minimum 3.0 ton capacity

The above list is indicative. Actual required / Installation capacity of electric hoist, ``

Chain Pulley Blocks

This includes supply, erection, testing and commissioning of adequate capacity chain pulley block with all the accessories. It should be compatible with the lifting chain of the pump.


8.7.2 Sludge Pump House(s)






make as directed by Engineer-in-Charge. The pump house shall house-




8.7.3 Chemical Dosing Tanks


to be provided.






shall be provided and shall be interlocked with Centrifuge in such a way that they

Start/Stop along with Centrifuge/ Screw Press.

2) Dosing Tanks:



Hydraulic Retention Time: Suitable for min. 8 hours of

Operation Free Board : as per design.


169

3) Dosing Pumps:


Type : Mechanically Actuated Diaphragm Type Metering Pump



8.7.4 Civil Structure for Mechanical De-watering Machines










8.7.5 Sludge Storage Platform






Notes:

For Tajpura ETP

Proposed area is given in two parts approximately at 1 km distance. Hence, Process

Units and operational Buildings shall be designed accordingly.

H.T Transformer, Metering Room , D.G. MCC, PLC, Rooms needs to be designed at

both parts of area.

8.8 Operations Buildings

8.8.1 Office, PLC Room etc

The building shall be constructed to house the following as a minimum on

i. PLC/Main LT (MCC) Room –as required

ii. Office rooms for the officers and staff with Lavatory cum Toilet block of required

size/area along with sanitary fittings as decided by the Engineer –in- Charge.

- One passage app. 2m wide.

iii. Workshop cum Tool Room

iv. Stair case up to terrace will be provided.

The height of ceiling shall be minimum 3.5 M from the floor level or higher to

suit the requirement. Adequate no. of toilets and wash basin shall be provided

separately for men and women and a separate toilet attached to the office room

shall be provided. A covered service water overhead tank of capacity 5 cum

shall be provided to cater to the water requirement of building and process

requirement.


170

8.8.2 Blower Room



requirements. Minimum space on other three sides of blower room will be 1.5 m

from the blowers. The blower room shall have sufficient ventilation, lighting and

working space. Control panels for air blower shall be placed in air conditioned

room, in blower room, if required. The room will be equipped with sufficient

capacity EOT (Min 2.0 times the weight of blower/motor) to facilitate removal of

blower/motor etc. for repairs. The room will also have rolling shutter or aluminium

glazed doors and windows.


The bidder shall have to construct single storey quarter for the operational staff.

The total no. of quarters and covered area shall be 80 m2. The provision in the

staff quarter consists of one bedroom, one drawing cum dinning, kitchen, store and

toilet. The construction material for walls shall be brick work in Cement Sand

mortar 1:5, RCC roof slab shall be (M 25). The door and windows shall be of

commercial hollock wood.


One toilet block for operators, one guard room and one meter room of sufficient

size as approved by Engineer-in-Charge shall be constructed.

8.8.4.1 Painting specifications common to all the buildings

Sr.No Description Specifications


2 Plaster



iii Roof including

cantilevers

Cement Mortar 1:3, 10 mm thick

3 Painting



4 Dado/ Skirting Same material as on flooring 2.10 m

high in toilet block and 0.15 m high

in all other rooms / spaces

5 Doors / windows Aluminium



along with an Underground Water Tank of capacity 10 m3 to cater to the water

requirements of the Building


171

8.8.4.2 Schedule of Finishes

Sr.

No.


Ventilators

1 MCC Room, PLC &

Control Room


approved make. The


shall be min 600 mm x

600 mm & thickness

min 10– 12 mm

Solid Core Flush

Door with heavy

duty Brass

Fittings of

approved make

Aluminum of

approved

make


Room, Workshop &

Tool Room,

Chlorinator cum

Chlorine Tonner

House, Thickener

Dilution Water Pump



IPS Flooring with

Abrasion

Resistant


make

MS Rolling

Shutter of

approved make

Aluminum of

approved

make



Anti-Skid Tile Flooring

of approved make

--- ---


Heavy Duty Paving

Blocks with Lacquer

Finish

--- ---


approved make

UPVC of

approved

make

6 Staircase: Inside

Building


of approved make

--- ---

In addition, the Building shall be provided with Passages, Wooden/Aluminum/Glass



Rooms/Areas as per requirement or as per instructions of the Engineer-in-charge.

Internal & External Plaster with Painting shall be done as per instructions of the

Engineer-in-charge. Plinth Protection shall be provided along the periphery as per

specifications.


Sr.

No.

Item of work Work


PLC/Control Room

2 Nos. of latest version & configuration

complete.


Room




172

3 Telecommunication

Facility




4 Plant Model 1 No. Wall Mounted Process Model

(Electronic Plant Display Model) with Flow

Diagram (Minimum size 3 m x 1.5m)


andlighting.

5 Air Conditioner Adequate nos. of Air conditioners shall be

provided as directed by Executive Engineer

8.9 SUB STATION (HT METER ROOM, HT PANEL ROOM, TRANSFOMER, PCC &

MCC PANEL ROOM)





shall be installed in open adjacent to Sub-Station building covered with fence and

gate with fire wall between two transformers as per IE rules and PSPCL norms.

Location of HT Meter Room shall be as per PSPCL norms.

Sub-Station building shall be RCC (M25) Frame and Brick Masonry Structure

equipped with Rolling Shutters, Windows/Ventilators, Exhaust Fans and Safety

Equipment’s including Sand Buckets, Fire Extinguishers and Fire Alarms etc.

complete as per PSPCL norms and IE rules. Also it shall be provided with IPS

Flooring, Internal and External Plaster with Painting and Plinth Protection along the

periphery as per specifications.

DG Set Area

The DG Set area with shed, foundation for DG, Safety Equipment’s including Sand


accommodate DG Set including AMF Panel, Fuel Tank and other Accessories. DG

Set shall cater to entire load of STP and average flow plus other misc. load of MPS.

Separate DG Set shall be provided for STP and MPS.

8.10 Process piping / drain piping/ channels

This shall include inter connecting pipelines / channels between different units of ETP

and fulfillment of contract limits.


Combination of pipes and channels can be used for conveyance of waste

water as per requirement of site conditions.



173



No., Flow, Size, Type, Material of Construction etc. with detailed P & ID for approval of

the Engineer-in-charge prior to any further engineering or procurement/fabrication and

installation.

Generally, the Material of Construction shall be selected based on the following guide

lines. The Tenderer can make suitable selection depending on Service, Type of Flow

(i.e. Gravity or Pressurized) and Diameter of Pipe.


Sr. No.

Service Design Velocity m/s

Limitations



2 Pressure Lines for Sewage & Water

0.6 – 1.5



5 Chemical Feed Lines 0.6 – 1.5 Irrespective of flow, Diameter shall not be less than 20 mm.

Sr.

No.

Service Type of Flow MOC

1 Waste Water / Sludge Gravity RCC NP-3 Class with HDPE lining

/ DI-K9 2 Waste Water / Sludge Pressurized CI / DI K-9


Pressurized

Inside Room – CPVC /MDPE / GI



4

Air Lines: Headers,

Vertical Down-comers

Pressurized Above Water: MS "C" Class, Sand Blasted and Epoxy Painted

Under Water: SS 304

Under Ground : MS with Coating

and Wrapping

In Blower Room: Pipe Insulation

with Resin Bonded Glass wool in

Rigid Board. Kindly refer detail

Mechanical specifications.


174

Valve: Guide Line

Sr.

No. Service

Typ

e MOC

End

Connection

A Sewage / Sludge

1

Gravity /

Pressurized Knife Gate

CI Body & SS 304

Gate & SS 410

Spindle

Flanged

2 Delivery of Pump Swing

Check

CS Body & SS 304

Internals Wafer

3


Pump Knife Gate

CI Body & SS 304

Gate & SS 410

Spindle

Flanged

B Service Water

1 Gravity /

Pressurized Ball

CS Body & SS 304

Internals Flanged

2 Delivery of Pump Swing

Check

CS Body & SS 304

Internals Wafer


Pump Butterfly

CI Body & SS 304

Internals Flanged

C Air


Internals Flanged

2 Delivery of Blower Swing

Check

CS Body & SS 304

Internals Wafer


Blower Butterfly

CI Body & SS 304

Internals Flanged

D Chemicals

1a Gravity /

Pressurized Ball

As per Chemical

Compatibility Chart Flanged

1b Gravity /

Pressurized Diaphragm

As per Chemical


1c Gravity /

Pressurized Plug

As per Chemical



Flow, Size, Type, Material of Construction, End Connection etc. with detailed P &ID for

approval prior to any further engineering or procurement/fabrication and installation.

5a Air Grid Piping: Aeration

Zone

Pressurized UPVC Schedule 40

5b Air Grid Piping:

Selector Zone

Pressurized SS 304


Pressurized

SS 304 except Chlorine & FeCl3


Pressurized

Schedule 40 UPVC


175

8.11 Security Cabins

Security Cabin of size 4.00 m x 3.00 m with washroom shall be provided at entry Gate

of the Plant. It shall be RCC (M25) Frame and Brick Masonry Structure equipped with

Doors, Windows/Ventilators, etc. complete. Also, it shall be provided with Flooring,

Internal and External Plaster with Painting and Plinth Protection along the periphery as

per specifications.

8.12 Site Development


around structures, top level of roads/pavements, lawns, landscaping etc. Lawns should

be 15 cm below top level of roads and pavements.

8.12.1 Boundary Wall

Construction of brick work boundary wall including MS Gate etc. complete in all respect

as per drawing is in the scope.

8.12.2 Roads& Pavement


every unit of the constructed works. These roads and footpaths shall be 4.2 m and

2.2m wide respectively. The roads/pavements shall be made of paver blocks. Cement

Concrete Kerb & Channel (1:2:4) shall be provided on both sides of the road. The Kerb

& Channel shall be 30 cm x 60 cm x 10 cm. Dowel shall be provided on both side of the

road with earth filling in proper slope and compaction as per direction of Engineer-in-

Charge.

8.12.3 Sewerage System, Drainage System and Storm Water System


inlet chamber and other units shall be carried through RCC Pipe / uPVC Pipe upto inlet

chamber of ETP/MPS. This may require provision of pumping arrangement.





bidder and approved by Engineer-in-Charge before execution of the work. The bedding

and haunches of pipes shall be as per the specifications approved by the Engineer-in-

Charge.


plant area.

8.12.4 Water Supply Arrangement

The bidder shall provide internal water supply scheme in the plant area. The main

water supply lines shall be of suitable size and of Ductile Iron (K-7) / MDPE/CPVC

Pipe/G.I. Class B. However, service connection to buildings / equipment / process units

will be of MDPE/CPVC. The supply of water shall be made through small tube-well to

be bored within the plant area. The bidder shall have to provide complete water supply

system including underground water storage tank of suitable capacity (subject to

minimum of 10 Cum) and over roof tanks wherever required. The water supply system

shall include making provision of hydrants / nozzles for washing of the various units /


176

pipelines. A booster pump of suitable capacity shall be provided for pumping the water

to above said units. Provision for all required pipes, specials, overflow pipes and bell

cock sluice valves shall also be included.

b) Small Tube well: It shall consist of a bore of suitable size and depth with PVC

casing pipe / filter housing a submersible pump set of suitable capacity complete in

all respect for pumping out water to meet the requirement of plant operation,

watering of plants, cleaning and staff requirement for daily use. Water should be

suitable for construction and drinking purposes.

8.13 Disposal of treated effluent

8.13.1 Treated Effluent Channel / Pipe










8.14 Miscellaneous

8.14.1 Stairs





8.14.2 Railings


The railings shall consist of three horizontal rows of 40 mm i/d GI pipe, Class C


8.14.3 Painting, Whitewashing and Allied Works









Pipes and specials




177

8.14.4 Lowering of ground water table during construction



8.15 Electrical & Instrumentation Works




necessary liaisoning for the same shall be done by the Contractor in consultation with

Engineer-in-charge.






Obtaining incoming HT Power from PSPCL including necessary liasoning,




HT Substation including 4-Pole Structure, HT Panel, Transformers, Power

Control Centre with APFC Capacitor Panel etc. complete.




LT Bus-Duct



Earthing for Electrical equipment’s as well as Instruments, PLC/SCADA.









CCTV System

Safety items (shock treatment chart, first aid box, CO2 fire extinguisher,

insulating mat, hand gloves, caution boards, LED signage, sand buckets,

discharge rods etc.)





178






8.16 PLC/PC/SCADA BASED AUTOMATION SYSTEM FOR ENTIRE PLANT


Logic Control (PLC) and Supervisory Control and Data Acquisition (SCADA). This shall

be achieved by either individual equipment PLCs with SCADA/HMI or single PLC and

SCADA for entire Sewage Treatment including pumping stations. Operation of primary

treatment units and sludge dewatering units shall be manual however indication of

operation of primary treatment units and sludge dewatering units shall be on

PLC/SCADA. These shall be located at control room of the STP.

The plant shall have provision for operations in following modes –

i) Automatic – Auto operation through PLC/digital controller.

ii) Manual – Operator intervention through SCADA/HMI.

iii) Local – Local operation through local control panel located near equipment.

Audio Visual Alarms

Audio visual alarms shall be initiated under emergency or equipment trip conditions,


be as follows:

Dynamic display of all Units, equipment and drives shall be available on

SCADA screen.



Auto/Manual operation of each drive shall be made by selecting a soft switch


In Auto mode, each drive shall operate based on pre-set sequence and

interlock. Also automatic change over from working to standby drive shall

happen after a drive reaches pre-set hours of operation.

In Manual mode, each drive shall be operated in Local/Remote mode by

selecting a soft switch on SCADA/HMI screen. In Local mode, each drive shall

be operated from the Local Push Button Station (LPBS) located nearby. In

Remote mode, operation from LPBS shall be disabled and each drive shall be

operated manually from PLC. Also provision for working/standby selection of

drives by selecting a soft switch on SCADA screen shall be provided.


Open/Close indication of all Auto Sluice Gates and Auto Valves shall be

displayed on SCADA/HMI screen.

Annunciation & Alarm facility shall be available in PLC/HMI/SCADA. In the

event of a Fault, the symbol representing the equipment/drive shall continue

flashing on SCADA/HMI screen with equipment/drive description appearing at

bottom of the SCADA/HMI screen and electric Hooter shall continue blowing

until the Fault Alarm is acknowledged.




179







the system running.

Different alarms colors provide information on their priorities.


installation of surge voltage arresters or surge voltage filters, to ensure that internal and

external surge voltages do not impair the function of his parts of the system.


memory.


station for the measured values and messages. Exceeding of limit values or deviations

detected by the above checks must trigger an event and cause a message to be sent.


Integrated, detailed error message and fault detection concept with display on

the HMI/SCADA for quick localization of faults. The system operator must be

able to identify the fault from the error.









The process system (PLC, HMI/SCADA) shall be protected against power failure by an

uninterruptible power supply (UPS). When the critical charge state of the UPS is


a) Mode selector switch A mode selector switch is to be installed on the MCC or distribution board. It serves for




Automatic: In this position, only automatic operation is possible; the local

switches have no function (Except emergency stop).








180





switches should be installed if possible in one switch box or at least installed

next to one another.

Each local switch must be adequately labeled in plain text so that no operator

errors can occur.

b) PLC The automatic start-up of the whole system, sequential operations and the automatic





The interlocks of the individual process groups and their signaling must be performed

by the PLC.

A system must be selected which is sufficiently protected against external interference

in the supply, control and signaling lines. The aim is that the program can continue to

run without fault signals in the event of transient earth faults in the supply grid. In the

event of prolonged power failures, on the other hand, a controlled restart must be

triggered (under-voltage trip of the non-automatic circuit breaker).



PLC of individual equipment shall be selected to carry out necessary

operations without overloading the PLC memory.




Retentively shall be 100% to save the recorded data and saving the

programmed logic, other attributes connected with system for power & system

failure.

Change in programme / modifications to programme shall be possible by a

portable laptop.


HMI/SCADA system

The HMI system shall be designed as a minimum 6”, color, touch-screen on the panel.

Whereas SCADA system must be computer based.

All displays must be designed by the Contractor with graphic sophistication and all

texts in the visualization system must be displayed in English.




When designing the user interface or the assignment of the function keys, attention

must be paid that the function key assignment remains the same in all sub-menus so


181

that it is possible to jump to another menu without first having to jump back to the main

menu.


Operating mode


Start-up times

Shutdown times





or sub-menu.





The central SCADA shall generate various reports to analyze plant performance. The


c) Computer hardware and software All programs required for operation of the system must be correspondingly compatible. The corresponding licenses must be supplied for the standard programs. The operating systems must be agreed upon with the Client. Minimum requirements shall meet:

CPU

1. Processor Intel i7 10th Gen




5. System memory

(RAM)

16 GB




9. Communication

ports


10. Graphic

accelerator

2 GB




Monitor






182

Complete Project shall operate in auto mode. As a minimum, following controls must

be considered in Bidder’s Control Philosophy:

i. Coarse screens



differential level in SCADA. Also if differential level is not reached for certain time

period, the screen shall be operated on the basis of set time in SCADA.



Physical switch over of screens in plant will be done by operator using manual gates.

Necessary interlocks, controls, alarms, report generation, etc. shall be considered in

PLC for auto operation of coarse screen.

ii. Raw Sewage Sump and Pumps

The sump will employ an Ultrasonic level transmitter to measure level. The combined

operation of Raw Sewage Pumps will be dependent on rate of change of level with

reference to time. The selection of Auto/Manual and Working/Stand-by shall be made

available in SCADA. In manual mode the pump Start/Stop will be done through SCADA

screen.

A clamp on type Ultrasonic or Electromagnetic flow transmitter shall be provided at

common header of pumps for measurement of flow to sewage treatment plant. PLC

shall calculate instantaneous flow as well as cumulative flow, both shall be displayed

on SCADA.


PLC for auto operation of Raw Sewage Pumps.

iii. Inlet chamber

A clamp on type Ultrasonic flow transmitter shall be provided on rising main of inlet

chamber for measurement of flow coming to Sewage Treatment Plant. PLC shall

calculate instantaneous flow as well as cumulative flow, both shall be displayed on

SCADA.

iv. Fine screens


transmitter / level switch, across it; the same shall be operated on the basis of set level

in SCADA. Also if level is not reached for certain time period, the screen shall be

operated on the basis set time in SCADA.



Physical switch over of screens in plant will be done by operator using manual gates.


PLC for auto operation of fine screen.

v. Grit Chambers

Each grit chamber will consist of Detroiter (1No.), Organic Return Pump (1No.) and

Screw Conveyor for grit removal (1No.). As such Detroiter, Organic Return Pump and

Screw Conveyor will not have auto operation; these will be started and stopped from

SCADA screen as required.


183

Necessary interlocks, alarms, report generation, etc. shall be considered in PLC for

operation of Grit chamber equipment.

vi. Anoxic Reactor

Complete operation and control of ETP plant will be done through a separate PLC and




Treatment Plant.


PLC for auto operation SBR basin.

Each Anoxic basins shall be equipped with Level Transmitter, DO Transmitter for


vii. Sludge sump and pump

An ultrasonic type level transmitter shall be used for measurement of level in sludge

sump.

Screw pumps will be used to feed sludge to Centrifuge. These will operate as per level

in sludge sump.

The selection of Auto/Manual and Working/Stand-by shall be made available in SCADA

for sludge pumps. In manual mode the Start/Stop of pump will be done from SCADA

screen.


operation of chlorination system.

viii. Chlorination tank

The selection of Auto/Manual and Working/Stand-by shall be made available in SCADA

for booster pumps. In manual mode the Start/Stop of pump will be done from SCADA

screen. Though chlorinator will have standalone operation, feedback for the equipment

shall be taken to PLC and displayed SCADA for monitoring purpose.


operation of chlorination system.

ix. Centrifuge/ Belt Filter Press

The drives and instruments of dewatering machines shall be connected to PLC for its

auto operation. Starting of dewatering system will be a manual process.


auto operation of dewatering machines.


184

9. Construction of new IPS

The locations with flow details are as follows:

Sr

No Location of IPS

Flow

(MLD) Peak factor

1 Gaushala 30 2.25

2 Sunder Nagar 8 2.25

3 Tibba Road 12 2.25

4 Kundan Puri 5 2.25

5 Upkar Nagar 13 2.25

6 Lord Mahavir Ayurveda Hospital 43 2.25

Design requirement described here is in general for various Items. However

design requirement of only those Items shall be applicable which are required or

provided at site. If design requirement of any item is not described here then

requirement as per CPHEEO Manual / relevant IS code or prevalent as per the

department practice will be applicable as approved by Engineer-in-charge.

9.1 Components of Intermediate Pumping Station

9.1.1 Civil Works

i. Receiving Chamber ii. Screening Channel iii. Wet well/Collecting Tank iv. Panel Room v. Roads & Pavements vi. Platform /Foundation for Diesel Generating Set & Transformer vii. Cable Trench, wire mesh around transformer viii. White washing/painting etc. ix. Hand Railing x. Pumping main from IPS to STP location xi. Valve chamber/platform to house common header, all valves, NRVs etc.


The deep gravity outfall sewers will discharge the raw sewage into a Receiving chamber.

The function of the Receiving chamber is to distribute the flow to screens. The Receiving

Chamber shall be designed for peak flow. The Receiving chamber shall consist of sluice

gates on upstream for flow regulation. The receiving chamber shall be of adequate size

to meet the requirements of workability inside it. C.I gate (Manually Operated) of suitable

size shall be provided at the inlet of receiving chamber. The entire construction is in

minimum M-30 grade concrete and as per IS 3370. RCC access platform minimum 1200

mm wide with GI pipe hand railing as per specifications shall be provided on one side of

the chamber:


Min. Detention period : 30 Sec at Peak Flow



185


Manual Trash screen to be installed in front of coarse mechanical screens to prevent

large and medium sized floating wastes from entering into intake structure of pumping

station.



provided should be with perforated basket at its bottom and guide roller on both sides

for easy removal. Guide channel extend upto to top of platform for guiding upward

movement. The height of trash screen should be 0.5 m above sewer crown. Material of

construction should be in SS-304. Flat size shall be of 10 mm thick 50mm wide:

Sr

No Location of IPS

Flow

(MLD) Peak factor

J Type Manual Screens

1 Gaushala 30 2.25 2

2 Sunder Nagar 8 2.25 1

3 Tibba Road 12 2.25 1

4 Kundan Puri 5 2.25 1

5 Upkar Nagar 13 2.25 1

6 Lord Mahavir

Ayurveda Hospital 43

2.25 2


(m/sec)

Velocity through Screen at Peak Flow (m/sec): 1.2 maximum




shall be in contractor’s scope. Railings shall be provided around the entire periphery of

the platform and structure.



provided.

iii) Coarse Screen

One mechanical screen working and one manual screen standby upto peak flow of 1250

m3/hour and two mechanical screens with one manual screen standby each of capacity

half of the peak flow for the peak discharge more than 1250 m3/hour with 20 mm clear

spacing shall be provided.

The mechanical and manual bar screens shall be made of 10 mm thick Stainless Steel

(SS 304) flats respectively. The mechanical coarse screens shall be of Inclined Rake

Type of 20 mm opening as per the specifications detailed elsewhere in the tender. Bin

and chute arrangement shall be provided for collection of screenings in a wheel

burrow/trolley. Manually operated CI gates are provided at the upstream and

downstream end to regulate the flow.

Adequate RCC Platforms shall be provided at the upper level to enable operation. GI

hand Railings shall be provided around the entire periphery of the platform. The entire


186

structure is to be in minimum M-30 concrete and as per IS 3370 including the platform.

RCC staircase 1200 mm wide shall be provided for access from the ground level to the

top of the unit & to the operating platform.

Sr

No Location of IPS

Flow

(MLD)

Peak

factor

Mechanical coarse

Screens

Manual coarse

Screens

1 Gaushala 30 2.25 2 1

2 Sunder Nagar 8 2.25 1 1

3 Tibba Road 12 2.25 1 1

4 Kundan Puri 5 2.25 1 1

5 Upkar Nagar 13 2.25 1 1

6

Lord Mahavir

Ayurveda

Hospital

43 2.25 2 1


(m/sec)

Velocity through Screen at Peak Flow (m/sec) :1.2 maximum





iv) WET WELL

The Main pumping station (MPS) shall be a rectangular concrete structure. The sump

well is to be in R.C.C of minimum Grade M-30 and shall be designed for peak flow. The

maximum operational liquid level in wet well shall be such that, minimum 100mm freefall

to be maintained from Invert of Screen Chamber to Water level of wet well. The capacity

of the wet well sump should be kept such that the detention time of the sump should be

at least 5 minutes peak flow. The wet well shall be divided into two equal compartments

upto full height with sluice gates in common wall where peak flow is more than 1250

m3/hour and single wet well be constructed where the peak flow is upto 1250 m3/hour .

The pumps shall be installed equally in two compartments with a provision to install one

pump in future in each compartment. In single wet well all the pumps with standby shall

be provided with a provision of space for one pump. Area of gate(s) should be sufficient

so as to divide the flow into any of the compartments, at a velocity not more than 1.2

m/sec.



submergence of the pump shall be provided as per the manufactures recommendations.

The size of wet well shall be sufficient to accommodate one additional pump in each

compartment, in future. CI steps shall be fixed in the wet wells.


Well.


187

Basis for Design

All underground or partly underground liquid containing structures shall be designed for the

following conditions:

(a) Liquid depth up to full height of wall and free board: no relief due to lateral soil














v) Sewage Pumps



alarm and tripping system installed. It will house non clog submersible pumps, which will

always be submerged in sewage with minimum submergence as required by the

manufacturer. Pumps will have automatic coupling arrangement at discharge end, a

guide pipe and chain for easy removal and lowering of pumps. Vibration shall be limited

as per BS 4675 Part I


Liquid : Raw Sewage



No of working Pumps : 4 Nos for peak flow more than 1250 m3/hr,

: 2 Nos for peak flow less than 1250 m3/hr


Standby Pumps : 50% of working pumps.

VFD for pump : 1 Pump in each compartment is to have the provision of VFD for flow variation





188


from columns.

vi) Rising main

Sewage from wet well will be pumped to Shaft or STP through rising main of size

suitable to carry peak flow.


Size of rising main : Capable of carrying peak flow

Velocity in rising main at peak flow : Maximum 1.5 m / sec



specials:

(i) RCC Channels from inlet chamber of screens upto sump/ wet well.

(ii) DI K-9 Delivery line for individual pump upto common header.

(iii) Expander, Sluice valves, Bends, Non Return Valves in the individual delivery


(iv) DI K-9 Common header upto Inlet of STP.

(v) The size of pipe shall be calculated so as to meet the following velocity

criteria:-

a. Minimum Velocity : 0.60 m/sec

b. Maximum Velocity : 1.5 m/sec

(vi) All other required fittings such as bends, tees etc.

(vii) Thrust block of M-20 grade, for pipe support, etc.

(viii) Necessary bypass arrangement shall be provided to be used during the





be applied with two coats of Birla / JK Wall Putty followed by two coats of primer

followed by min two coats of first quality plastic emulsion paint.

All the structural steel, pipes, specials etc shall have two coats of Epidec RTC Primer







Thickness of paver blocks on roads is 80 mm thick and on pathways the thickness of

paver blocks is 60 mm. Paver blocks shall confirm to specification of code IS 15658

Paver blocks will be ISI Marked.

x) IPS Panel Room


pumps, screens, sluice gates, valves etc. It shall also house PLC Panels and HMI


189

screen for display of various parameters of IPS. Preferably the MPS panel room building

is to be adjoining to WET WELL so as to have a better monitoring.





feature and lockable in pressed position to avoid accidental operation of drive from MCC,

PLC during shutdown.



9.1.2 Mechanical Works

i) J Type Manual Coarse screens, Manual and Mechanical Coarse Screen, Belt Conveyor for screens

ii) CI Sluice Gate shall be provided at following locations for flow control

a) Inlet of Receiving Chamber-1 No. b) Upstream of coarse screens of IPS c) Downstream of coarse screens of IPS d) RCC Partition Walls of Wet Well – 1 No for larger IPS e) Any other gate as required

iii) Non clog Submersible Centrifugal Pumps sets with motor iv) Piping works, Dismantling Joint, NRV, Sluice Valve with appurtenance v) Lifting Arrangement –Monorail with electric horizontal and vertical operation

9.1.3 Electrical, Instrumentation & Control Works

i) HT VCB Panel ii) Transformer ONAN with on load tap changer iii) Silent Diesel Generating Set with AMF Panel suitable for average flow plus

other miscellaneous load iv) Electrical Panel with



v) HT & LT Cable, Instrument & data cable vi) Cabling system vii) Earthing & Lightening Protection viii) Lighting System (Indoor & Outdoor) ix) Junction Box for cables x) UPS for PLC xi) Instrumentation & Control

This includes supply, erection, testing and commissioning of various instruments & control

system. Brief details are as under:


190





1



2


Panel Room 1


requirement

PLC for IPS shall be as per control philosophy & specification.





rotation.




Notes:

H. T Room and Transformer shall be as per requirement

Security Room with Toilet Block shall be provided.


191

10. Design Criteria for Mechanical Dewatering of sludge generated from existing

UASB Plant at Bhattian & Balloke

Design requirement described here is in general for various Items. However design

requirement of only those Items shall be applicable which are required or provided at

site. If design requirement of any item is not described here then requirement as per

CPHEEO Manual / relevant IS code or prevalent as per the department practice will be

applicable as approved by Engineer-in-charge.

10.1 Arrangement for Mechanical Dewatering of Sludge generated from existing

111 MLD UASB plant at Bhattian.

Presently, the sludge from 9 UASB Reactors is collected in sludge sumps near the

reactors. From sludge sumps it is pumped to existing sludge drying beds in the same

premises. To save on the land occupied by sludge drying beds and manpower required

for maintaining the sludge drying beds; it is proposed to set up an arrangement for

mechanical dewatering of sludge withdrawn from UASB reactors. The indicative scope

of work is as under:-

Sr.

No. Component Details

i New Sludge

Handling Unit


Sludge sump

Sludge pump houses


Sludge Dewatering mechanism including

building like Combined mechanical Thickener

cum Belt Press or Centrifuge + gravity sludge

thickener



Arrangement of handling/ disposal of de-

watered sludge if required to the land

earmarked by Employer.


ii Existing Sludge

Drying Beds

If for construction of new STP/MPS/other

units, some of the sludge drying beds are to

be dismantled, the same is included in the

scope of work. Otherwise existing Sludge

Drying Beds will remain as these are.

Sludge withdrawal from UASB unit.



be collected in a single sludge sump and shall be fed to

a. Gravity Thickener followed by Centrifuge dewatering machine or



192

i) Sludge Sump





provided


Free Board : 0.5 m


sludge production

Minimum SWD : 3.0 m

ii) Sludge thickener unit with Centrifuge





Design criteria



3. Continuous gravity thickener shall be

circular RCC units with minimum 3.0 m

side water depth. Side depth shall be

based on three considerations.

4. Free board 600 mm

5. Settling zone 1200 mm to 1800 mm

6. Compression zone Depth required toprovide a

volume equal to twenty four

hours detention of maximum

sludge wasting.

7. The floor slope of gravity thickeners will be greater than 120 mm of vertical

distance per meter of tank radius.

Central drive arrangement shall be provided to rotate trussed rake arms

having blades to sweep the sludge into sludge hopper.

The mechanism shall include a fixed half circle Bridge, Center Assembly with Drive

Unit, Feed Well, Center Cage, Rake Arms, Walkway with Handrails, Scum Skimmer,

Scum Box, Weirs, Baffles, Anchor Bolts and such other fittings, devices, or

appurtenances as are necessary for a complete operating installation.

Sludge thickener tank shall be circular in shape with fixed bridge. The tanks shall be

designed in accordance with the design data provided earlier and as per the guideline

of Manual on Sewerage & Sewage Treatment, Ministry of Urban Development, latest

CPHEEO. Minimum side water depth shall be 3.0 m. The sludge thickener shall be of

radial flow type. At periphery the flow shall pass through SS-304 V notch weir of

minimum 2 mm thickness and then shall be collected into an annular RCC launder

provided all around the periphery of the tank. The V notch weir shall be made out of 2

mm thick Stainless Steel (min. 150 mm ht.) with clamps for making adjustments.


193

iii) Sludge Pump House(s)










iv) Chemical Dosing Tanks


to be provided.



online at the inlet of Centrifuges. Minimum dosage of polyelectrolyte shall be 0.5-1.5

Kg/Ton of dry solids at 0.1% solution strength. The solution will be dosed using




Centrifuge.

Dosing Tanks:




Free Board : As per design.

Dosing Pumps:


Type : Mechanically Actuated Diaphragm

Type Metering Pump



v) Civil Structure for Mechanical De-watering including




vehicle directly under the sludge discharge line. The building shall be framed RCC

structure have a RCC roof at a height suitable for installing EOT. The dewatered

sludge shall have a minimum solids concentration of 20% or more (measured as dry

solids w/w basis) so that it can disposed by open body Trucks/Trolleys.


194

10.2 Arrangement for Mechanical Dewatering of Sludge generated from existing 152

MLD UASB plant at Balloke.

Presently, the sludge from 12 UASB Reactors is collected in sludge sumps near the

reactors. From sludge sumps it is pumped to existing sludge drying beds in the same

premises. To save on the land occupied by sludge drying beds and manpower required

for maintaining the sludge drying beds; it is proposed to set up an arrangement for

mechanical dewatering of sludge withdrawn from UASB reactors. The indicative scope

of work is as under:-

Sr.

No. Component Details

i New Sludge

Handling Unit


Sludge sump

Sludge pump houses


Sludge Dewatering mechanism including

building like Combined mechanical Thickener

cum Belt Press or Centrifuge + gravity sludge

thickener



Arrangement of handling/ disposal of de-

watered sludge if required to the land

earmarked by Employer.


ii Existing Sludge

Drying Beds

If for construction of new STP/MPS/other

units, some of the sludge drying beds are to

be dismantled, the same is included in the

scope of work. Otherwise existing Sludge

Drying Beds will remain as these are.

The bidder shall carry out assessment to ascertain the quantity and quality of sludge to

be handled and condition of the existing sludge handling systems.

Sludge withdrawal from UASB unit.



be collected in a single sludge sump and shall be fed to

a. Gravity Thickener followed by Centrifuge dewatering machine

or


i) Sludge Sump





195


provided:


Free Board : 0.5 m


sludge production

Minimum SWD : 3.0 m

ii) Sludge thickener unit with Centrifuge





Design criteria



3. Continuous gravity thickener shall be

circular RCC units with minimum 3.0 m

side water depth. Side depth shall be

based on three considerations.

4. Free board 600 mm

5. Settling zone 1200 mm to 1800 mm

6. Compression zone Depth required to provide a

volume equal to twenty four hours

detention of maximum sludge

wasting.

7. The floor slope of gravity thickeners will be greater than 120 mm of vertical

distance per meter of tank radius.

Central drive arrangement shall be provided to rotate trussed rake arms having

blades to sweep the sludge into sludge hopper.

The mechanism shall include a fixed half circle Bridge, Center Assembly with Drive

Unit, Feed Well, Center Cage, Rake Arms, Walkway with Handrails, Scum Skimmer,

Scum Box, Weirs, Baffles, Anchor Bolts and such other fittings, devices, or

appurtenances as are necessary for a complete operating installation.

Sludge thickener tank shall be circular in shape with fixed bridge. The tanks shall be

designed in accordance with the design data provided earlier and as per the guideline

of Manual on Sewerage & Sewage Treatment, Ministry of Urban Development, latest

CPHEEO. Minimum side water depth shall be 3.0 m. The sludge thickener shall be of

radial flow type. At periphery the flow shall pass through SS-304 V notch weir of

minimum 2 mm thickness and then shall be collected into an annular RCC launder

provided all around the periphery of the tank. The V notch weir shall be made out of 2

mm thick Stainless Steel (min. 150 mm ht.) with clamps for making adjustments.

iii) Sludge Pump House(s)




196








iv) Chemical Dosing Tanks


to be provided.



online at the inlet of Centrifuges. Minimum dosage of polyelectrolyte shall be 0.5 – 1.50

Kg/Ton of dry solids at 0.1% solution strength. The solution will be dosed using




Centrifuge.

Dosing Tanks:




Free Board : As per design.

Dosing Pumps:



Pump



v) Civil Structure for Mechanical De-watering including




vehicle directly under the sludge discharge line. The building shall be framed RCC

structure have a RCC roof at a height suitable for installing EOT. The dewatered

sludge shall have a minimum solids concentration of 20% or more (measured as dry

solids w/w basis) so that it can disposed by open body Trucks/Trolleys.

annexure-3 : revised “ volume 2(r1)”

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