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Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 1
PROJECT REPORT
On
PROPOSED FORMATION OF COMPOSITE HOUSING SCHEME BY
KARNATAKA HOUSING BOARD
At
Hire Malligvad, Chik Malligvad, Kelgeri &
Mommigatti Villages of Dharwad Taluk and District,
Karnataka
DEVELOPED BY:
M/s Karnataka Housing Board,
3rd & 4th Floor, Cauvery Bhavan,
K. G. Road,
Bangalore – 560 009
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 2
PROJECT REPORT
1.0 GENERAL INFORMATION
Karnataka Housing Board was established by legislation in 1962 as a farsighted move to
satisfy the increasing housing needs of the people. Over the decades, KHB has provided
housing to 1.10 lakh families. It is the only housing agency, which has completed 950
schemes spread over the entire state. The board has taken up diverse roles to provide
housing to different segments. Unlike privately developed housing layouts, KHB
townships and layouts meet standard norms of town planning and land usage.
KHB would bring more transparency in its operations. Hence it has opened up new
wings like customer relation cell, property management and project management units
to cater to the needs of the customer. It would like to ensure that all the townships
maintain quality of highest standards. All townships will be self contained with all urban
and civic amenities, and will include rain water harvesting, water recycling, tertiary
treatment, developed open spaces and parks, and infrastructure for health, education
and recreation.
2.0 PROJECT LOCATION
The proposed “Housing Scheme by KHB,” is planned to be developed at Hire Malligvad,
Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
Table 1
Details of Project
S. No Particulars Details
1 Developers Assistant Executive Engineer
M/s Karnataka Housing Board,
Chanakyapuri, Hubli City, Hubli - 580 029
2 Objective of the Project Composite Housing Scheme
3 Description of the Project The proposed “Composite Housing Scheme by KHB,” is planned to be developed on a land measuring about 117.62 Ha (290.65 Acres) after deducting ‘B’ Kharab land – 06 G No. of plots 4066 No. of houses 172
4 Location of the Site The proposed project is located at Hire Malligvad, Chik Malligvad, Kelgeri &
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 3
Mommigatti Villages of Dharwad Taluk and District, Karnataka.
5 Total Project cost Proposed
Investment
Rs. in Lakhs
Total 11038.64927
2.1 CONNECTIVITY: The project is located at a distance of 6 Kms (SSE) from Dharwad.
The Dharwad Railway station is located at a distance of 7.3 Kms (SSE) and Kyaarkoppa
Railway station is located at a distance of 3.4 Kms (S) from the project site. The project
site is adjacent to the NH 4 at East direction and is well connected to SH 73 at a distance
of 0.83 Kms (E).
3.0 PROJECT FEATURES:
3.1 Design details
Proposed Composite Housing project scheme will have Residential Plots & Houses.
Karnataka Housing Board has acquired the land required for the project.
The figure showing the 2 km, 5 km and 10 km radius map of the project study area are
given as Figure 1, 2 and 3 respectively. The google map demarcating the proposed
layout, project layout map and location plan are given as Figure 4, Figure 5 & Figure 6.
The photographs of the site are shown in Figure 7 respectively.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 4
Figure 1
Base map of the study area (2 km Radius)
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 5
Figure 2
Base map of the study area (5 km Radius)
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 6
Figure 3
Base map of the study area (10 km Radius)
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 7
Figure 4
Google map demarcating the proposed project location
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 8
Figure 5
Project Layout Map
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 9
Figure 6
Location Plan of the Proposed Project
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 10
Figure 7
Photographs of the Proposed Project site
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 11
Table 2
Area Statement
Combined Land use Analysis
S. No Description Sq.mts Acres %
1 Residential 600075.633 148.2 51.02
2 Commercial 17444.85 4.3 01.48
3 Parks & Open Spaces 121393.50 30.0 10.32
4 Civic Amenity (Public &Semi Public) 44460.79 11.0 03.78
5 Traffic & Transportation 392869.33 97.1 33.40
Total 1176244.11 290.6 100
Table 3
Plots & Houses Details
S. No
Category Plot size (M)
Total No. of Plots
Population in Plots
Total No. of
Houses
Population in Houses
Total Plots & Houses
Total Population of Plots &
Houses
1 EWS 6X9 621 3105 - - 621 3105
2 LIG 9X12 1178 5890 90 450 1268 6340
3 MIG 9X15 1555 7775 80 400 1635 8175
4 HIG I 12X18 641 3205 02 10 643 3215
5 HIG II 15X24 71 355 - - 71 355
Total 4066 20330 172 860 4238 21190
No of persons per plot / house / family considered @ 5
3.2 Power Requirement Details
3.1.0 Power Requirement and Source:
Total power required will be sourced from Hubli Electricity Supply Company Limited
(HESCOM). The detailed power required is given in Table 4.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 12
Table 4
Power Requirement
Category Total
Plots & Houses
Power consumption
per plot (kVA)
Total Power consumption
(kVA)
Total Power consumption
kW(0.8)
Total Power consumption MW
(0.001)
EWS 621 3 1863 1490 1.5
LIG 1268 3 3804 3043 3.0
MIG 1635 4 6540 5232 5.2
HIG I 643 5 3215 2572 2.6
HIG II 71 5 355 284 0.3
Total 4238 15777 12621 12.6
Source : Hubli Electricity Supply Company Limited (HESCOM)
4.0 Water Requirement Details
4.1.0 Water Source:
During construction Phase water required will be met from bore wells whereas during
operational phase water required will be taken from Bore wells and Karnataka Urban
Water Supply & Drainage Board (KUWSDB).
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 13
4.1.1 Water Requirement:
Table 5
Water Demand
Category
No. of
Plots &
Houses
Persons
per plot
Total
population
Per Capita
Consumption
(LPD)
Consumption
(KLD)
Total Water
Consumption
(KLD)
Waste
Water
(KLD) Fresh Treated Fresh Treated
EWS 621 5 3105 90 45 279 140 419 377
LIG 1268 5 6340 90 45 571 285 856 770
MIG 1635 5 8175 90 45 736 368 1104 994
HIG I 643 5 3215 90 45 289 145 434 391
HIG II 71 5 355 90 45 32 16 48 43
Comm. 17444
(Sq.m) 1744 30 15 52 26 78 70
Total
22934
1959 980 2939 2645
Parks &
open
spaces
12
(Ha)
25 - 300 300
Total
Note:
Commercial 1 person per 10 Sq.m
Green belt 25 KLD/Ha; STP : 3 MLD
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 14
Water Balance:
Total Water Requirement 3239
Fresh Water 1959
Treated Water 1280
Residential 1907
Commercial 52
Flushing 980
Green Belt 300
1716 47 882
STP 2645
Treated Water 2513
1280
Sewer 1233
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 15
4.0 Wastewater Management
The wastewater characteristics before and after treatment are given in the Table 6. The
treated water will be used for flushing and greenbelt; excess will be discharged in sewer
or in recharge pit.
Table 6
Wastewater Characteristics
S. No Parameter Unit Raw Sewage Treated Sewage
1. pH -- 6.5 - 8.5 7.5 – 8.5
2. Suspended Solids mg/L 150 - 300 20
3. BOD mg/L 250 - 300 20
4. COD mg/L 400 - 600 100
5. Oil & Grease mg/L <10 <10
a) Prediction of Impacts on Water Environment
Impacts on water environment in the project impact zone would be classified into 2
groups viz. the surface water impacts and groundwater impacts. The water required will
be met from Bore wells and Karnataka Urban Water Supply & Drainage Board (KUWSDB)
and entire wastewater will be treated and partly used for flushing and greenbelt, the
remaining is discharged into sewer or recharge pit, hence the impacts on nearby surface
water will not be envisaged.
b) Storm Water Management
Based on the rainfall intensity of the plant area, storm water drainage system will be
designed. Storm water drainage system consists of well-designed network of open
surface drains and rainwater harvesting pits at regular intervals along the drains so that
all the storm water is efficiently drained off without any water logging.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 16
5.1 STP Design
The design of a sewage treatment work will be dependent on the quality and quantity of
the waste to be treated. The following are some of the important characteristics of
domestic sewage:
Organic Matter
Organic matter is the most important polluting constituent of sewage in respect of its
effects on receiving water bodies. It is mainly composed of proteins, carbohydrates and
fats. Organic matter is commonly measured in terms of BOD and COD. If untreated
sewage is discharged into natural water bodies, biological stabilization of organic matter
leads to depletion of oxygen in water bodies.
Nitrogen & Phosphorus:
Nitrogen and phosphorus are also very important polluting constituents of sewage
because of their role in algal growth and eutrophication of water bodies. Nitrogen is
present in fresh domestic sewage in the form of proteinaceous matter urea (i.e. organic
nitrogen). Its decomposition by bacteria readily changes it into ammonia. In aerobic
environments ammonia nitrogen is oxidized into nitrites and nitrates. Nitrates can be
used by algae to form plant proteins. Nitrogen is commonly measured as TKN (organic +
ammonical) as sewage characteristics. Nitrate and nitrite forms of nitrogen are also
measured when quality of receiving/affected water (streams, underground water) is
monitored.
Phosphorus is usually present in orthophosphate, polyphosphate and organic phosphate
forms. Organically bound phosphorus is of little importance in domestic sewage
whereas polyphosphate forms undergo hydrolysis to revert into the orthophosphate
forms, although this conversion is quite slow.
Suspended Solids:
Suspended solids represent that fraction of total solids in any wastewater that can be
settled gravitationally. Suspended solids can further be classified into organic (volatile)
and inorganic (fixed) fractions. Organic matter is present in the form of either settleable
form or non-settleable (dissolved or colloidal) form. If the organic fraction of suspended
solids present in sewage is discharged untreated into streams, it leads to sludge deposits
and subsequently to anaerobic conditions.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 17
Dissolved Oxygen:
Dissolved oxygen, as such, does not have any significance as a sewage characteristic.
However, it is the most important pollution assessment parameter of the receiving
water bodies. Stabilization of organic matter, when discharged untreated or partially
treated in receiving waters, leads to depletion of their dissolved oxygen. Nutrients
(nitrogen and phosphorus) addition due to discharge of untreated or treated sewage
may lead to algal growth in streams. During day time, algae undergo photosynthesis
process and the oxygen released by this process is much more than their respiration
requirements resulting in a net addition of dissolved oxygen to water. However, during
night time photosynthesis process is stopped whereas respiration requirement
continues. This leads to depletion of dissolved oxygen in waters. Thus, it is observed that
all the polluting constituents of sewage explained above have their direct or indirect
effect on dissolved oxygen of receiving waters.
Bacterial Parameter (Fecal Coli form):
Although organic matter, in dissolved as well as suspended form, is the most important
parameter of sewage as far as ecology of receiving water bodies is concerned, Bacterial
parameters, such as Fecal Coli form (FC), which serve as indicators of fecal pollution are
also very important when human health is the prime concern. Sewage is discharged
either into a water body, which is used for various purposes such as source of drinking
water supply and bathing or discharged on land for irrigation, where human beings
come in contact with it. Population consuming water from such sources which receive
sewage discharges and persons involved in agricultural activities where sewage is
applied become vulnerable to infection from pathogenic organisms (mainly bacteria and
viruses) which are discharged by human beings who are infected with disease or who
are carriers of a particular disease. Thus, to check quality of receiving waters for various
uses and to assess acceptability of degree of treatment given to sewage, assessment of
bacterial quality also becomes important. Because specific identification of pathogenic
bacteria is extremely difficult, the coli form group of organisms is used as an indicator of
the presence in wastewater of pathogenic organisms. Coli form bacteria are found in
intestinal tract of human beings. Each person discharges about 100 to 400 billion coli
form bacteria per day. Presence of coli form organisms is taken as an indication of
presence of pathogenic organisms and absence of coli form organism is taken as an
indication that water is free from disease producing organisms.
A detailed study on the sewage from various sources of study area is to be carried out
and hence average characteristics of raw sewage can be obtained to design the
treatment system.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 18
5.2 Design Parameters
a) Sewage Treatment Plant design report for 3 MLD
1. Preface :
Karnataka Housing Board has undertaken the development of a housing project at Hire
Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District,
Karnataka. The housing project comprises of about 4238 residence with a population of
about 21190.
To treat the domestic sewage produced by the layout it is proposed to provide STP of
3000 KLD (3 MLD) capacity considering of contours of land terrain.
2. Sources Of Sewage Generation & Characteristics :
Total number of Plots & Houses: 4238, Population @ 5 each = 21190
Total Population = 22934 Say 23000 (including commercial)
Considering the Commercial population of 1 person /10 sq. m @ 1744
Total Water requirement = 2939000 (5015 X 135 LPD, 100 X 15 LPD, 742 X 45 LPD)
= 2939.00 cum/day
Assuming 90% of the water consumed, coming out as wastewater,
Average wastewater flow = 2645 m3/day.
The total sewage generated = 2645 m3/day say 3 MLD
Sewerage treatment Plant (STP) of 3 MLD capacity of Sequential Batch Reaction (SBR)
system, to suffice for the population of @ 22934
The entire quantity of sewage of 3000 KLD is produced by domestic uses like toilets,
bath rooms and kitchen. The sewage produced is collected through UGD system and
conveyed to the STP.
The main characteristic of the sewage are moderate BOD, small quantity of oil and SS.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 19
3. Treatment Scheme :
Sequential Batch Reactor Process on extended aeration principle with sludge recycle is
proposed to be adopted. The treatment process is as represented in the chart given
below.
4. Treatment Method :
The sewage generated from the colony is conveyed to the treatment plant through UGD
system and collected in a hold up tank/ pre-equalization tank. Almost 75% of the
sewage is generated during the peak hours in the morning and evening only and during
Incoming raw sewage (300 BOD)
Bar Screen
Grit Chamber Grit collection
Hold up tank/wet well
SBR Tank (diffused aeration)
Return sludge Clarifier Excess Sludge to Filter Press
Pressure sand filter
Polishing pond/post equilisation
Disposal for Irrigation / Gardening
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 20
the rest of the day the flow will be minimum. Hence, the holdup tank of 50% of the total
daily flow is proposed from where, the liquid is pumped to the SBR tank for biological
treatment.
The raw effluent contains rags, grit etc which need to be separated in a grit chamber
fitted with bar screens for the removal of rags. The sewage free of grit & sand and rags
is pumped to the SBR tank.
In the SBR tank both aeration and sludge settling take place alternately at different
intervals in the same tank. Aeration is carried out with diffused aeration system with
fine bubble tube diffusers. Required quantity of air is supplied by roots blowers. One
standby roots blower is also provided to take care of break down condition. After
diffused aeration for a fixed period of time, the blower is shut off for allowing the sludge
to settle. The settled sludge is taken to a sludge sump from where; part of it is pumped
back into the SBR to maintain an MLSS level of 2000 mg/ lit and excess sludge is sent to
filter press for dewatering.
The clarified water is removed from the upper zone of SBR tank and stored in an
intermediate storage tank from where it is pumped to pressure sand filter. The lower
zone acts as sludge zone during settling process.
Aeration is carried our continuously allowing 2 hours settling time at every 4 hours
aeration. During settling time, the aeration is shut off.
MLSS concentration of 2000 mg/lit is maintained in the SBR tank.
5. Design Parameters:
5.1 Effluent characteristics:
The characteristics of the untreated combined effluents adopted for the designs are as
below
i. PH Value : 6-8
ii. S.S : 100 mg/lit
iii. BOD : 300 mg/lit
iv. COD : 500 mg/lit
v. Oil & grease : traces mg/lit
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
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5.2 Treated Effluent Quality:
i. PH Value : 5.5 to 9
ii. BOD : < 100 mg/lit (irrigation standards)
iii. COD : < 250 mg/lit
iv. S.S : < 100 mg/lit
v. Oil & grease : < 10 mg/lit
6. Designs :
Flow per day = 3000 cum = 125 cum / hr
6.1 Grit Chamber and bar screen:
Proposed size L = 5.4m, B = 1.00 m, H= 1.00 m
The chamber is fitted with one coarse screen and one fine screen.
6.2 Pre-Equalizing cum-Hold up tank:
The major portion of the daily sewage is produced during the peak periods in the
morning and evening only. The capacity of the holdup tank shall be enough to store the
peak flow for at least 3 hours.
Average hourly flow = 125 cum
Peak flow factor considered = 3
Therefore, peak flow = 3 x 125 = 375 cum
Detention Time = 4 hours
Therefore tank size = 375 x 4 =1500 cum
Liquid depth proposed = 5 m
Area of Tank = 1500/5 = 300 Sq.m
Provide a circular tank of dia 19.6 m X 5.0 (SWD) (volume provided 1507.8 cum). In
order to prevent setting up of anaerobic condition, thereby odour problem, air agitation
is provided with coarse bubble tube diffusers.
From this tank, the liquid is pumped the SBR tank for further treatment.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
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6.3 Sequential Batch Reaction Tank
Diffused aeration system:
Q = 3000 cum/day
BOD = 300 mg/lit
MLSS = 2000 mg/lit
F/M = 0.25
BOD of the incoming Effluent = 300 mg/lit
BOD load per day = 3000 x 300 x 10 –3 = 900 kg
V = BOD X Flow / (0.25 X Biomass) Where V is volume of aeration tank
. . . V = 1800 cum
Hence to provide tank size of adequate area with minimum liquid depth as required for
treatment and with reference to the land proposed.
Air blower
Total BOD per day = 900 kg
Oxygen requirement at 2 kg / kg of BOD =900 x 2 = 1800 kgs/ day
In a 24 hours cycle, there will be 4.5 cycles of aeration of 4 hours each (total 18 hours of
aeration in a day)
Therefore, Oxygen requirement per hour = 1800 / 18 = 100 kg/hr
Air contains approximately 0.25 kg/ of Oxygen per cum of air.
Therefore, theoretical air volume required = 100/0.25 = 400 cum/hr
Considering oxygen transfer efficiency of aeration system at 25%, actual air requirement
= 400/0.25 = 1600 cum/hr
Provide 1- no-roots blower of capacity 1600 cum/hr @ 0.5 MWC, with an additional
standby unit.
Number of diffusers:
80mm x 1000mm fine bubble tube diffusers are proposed with air discharge capacity of
10 cum/Hr.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 23
The clarified water is removed from the top zone with a clarifying arrangement. The off
and on arrangement of aeration system operates on electrical level control
arrangements.
Clarifier:
To separate sludge a clarifier is proposed:
Dimensions of clarifier 7m Dia x 3m SWD
Sludge collecting arrangement:
The SBR tank also acts as sludge settling clarifier.
Settling time provided = 2 hours.
. . . Settling volume = 125 x 2 = 250 cum
To provide a settling depth as per the standard norms
Accordingly the depth of SBR tank is to be provided
Therefore, total depth of SBR = design depth of SBR + settling depth
The settled sludge is removed from the bottom.
The bottom of the tank is to be provided with slope with sludge flow gutters. The sludge
flows into the sludge collection sump by gravity and due to water pressure of the
aeration tank to sludge collection for removal.
6.4 Clarified intermediate water storage tank:
To provide adequate capacity tank which shall include 1day standby volume
Pump size = 125 cum x 35 m head.
6.5 Secondary Sludge collection/digester pit:
To provide a sludge collection pit/digester sump of adequate size and depth with sludge
transfer pump (1+1) of capacity 5 cum/hr x 10 m head for transferring the sludge to SBR
tank.
Air agitation is provided in this sump also to maintain oxygen level to microorganisms.
Excess sludge is pumped to filter press for dewatering.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
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6.6 Treated water storage tank/post equilisation tank
Considering the Detention Period of 16 hours as per the norms and specification the To
provide the tank of adequate size and the additional capacity to be provided to
accommodate sudden overflows.
6.7 Sludge drying arrangement:
Provide a plate and frame type filter press. Sludge cakes are removed at regular
intervals. The water from the filter press is joined for polishing to post equalization
pond.
6.8 Pressure sand filter
Flow per hour = 125 cum
Filtering rate = 10 cum/hr
Area of filter = 125/10 = 13 Sq.m
Provide 2m dia filter with multigrade sand filter media, with back washing
arrangements.
6.9 Chlorination:
The treated effluent is chlorinated at an average dose of 2 ppm for disinfection, through
a gas chlorinator.
7 Control room:
It is proposed to construct a control room to accommodate the equipments which are
needed to be installed in the shed area as well the electrical control panel board and
other ancillary units of STP
8 DISPOSAL:
(a) The treated effluent is used for irrigation & horticulture and gardening.
(b) The dried sludge cakes are disposed off as manure.
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
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c) Rain Water Harvesting System
Project Management will properly utilize the rainwater by adopting appropriate rain
water-harvesting mechanism. Rainwater harvesting is done by the construction of
harvesting pits all along the storm water drainage network at a definite pitch. Necessary
expert advice will be obtained in this regard. Artificial recharge measures like rain
water-harvesting helps in reducing the urban run-off, decrease pollution of ground
water and improve the ground water table, which augments the yields of, bore wells.
The rain water collected over the storm water drains will be diverted to rain water
harvesting pit.
6.0 Solid Waste Management
The solid waste generated during construction phase will be segregated into domestic
waste and rubble / construction waste. The domestic waste will be daily disposed off to
the municipal bins / dump area, while construction waste will be sold to the contractors
for low lying areas land filling while recyclable material will be sold to registered
recyclers.
As the proposed project is a construction project, the nature of solid waste will be in
from dry and processed food packets, raw vegetable waste, food remain ants, twigs, dry
leaves, flowers, office stationery in origin, which includes paper, cardboard, packets,
files, plastic bags, files, e-waste in form of computers, etc. Apart from this, solid waste
from canteen and litter from the green belt are the main constituents of the solid waste.
They contain peels, empty nuts, water bottles, cans, etc. All the bio-degradable waste
will be segregated and disposed off scientifically. Re-cycle able waste will be sold to
authorized recyclers. The e-waste will be given to authorized dealers.
The STP Sludge from the Sewage Treatment Plant would be transferred to filter press
and sludge digester. This sludge is used as manure with in the premises. The details of
the solid waste generated from the proposed project are given in Table 7
Table 7
Solid Waste Details
S. No Details Population Solid waste Generation
(Kg/ capita/day) Total Solid
waste (Kg/day)
1 Domestic solid waste (Residential)
21190 0.6 12714
2 Commercial 1744 0.2 349
Total 13063
Proposed Formation of Composite Housing Scheme in lands at Hire Malligvad, Chik Malligvad, Kelgeri & Mommigatti Villages of Dharwad Taluk and District, Karnataka.
2015
M/s. Ramky Enviro Engineers Ltd 26
Hazardous Waste
DG set Oil Sludge 25 lts/annum
30 lts /annum
Given to recyclers
STP Sludge 214 kgs/day Used as manure for greenbelt development
Sludge Generation
Sludge generation = Q X BODIN – BODOUT
______________________________ X 0.3 Kgs/day 1000
= 2645 X 300 – 30 X 0.3
1000
= 214 Kgs/day