26122013 interim report 150 mld

8/15/2019 26122013 Interim Report 150 MLD

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Contents

1. INTRODUCTION

8

1.1 Background

8

1.2 Field Investigations

9

1.3 Bathymetry

9

1.4 cope o! this Interim Report

9

2. SITE CONDITIONS

1"

2.1 ite #ppreciation

1"

2.2 Finished Floor $evel

12

2.3 %limate

12

2.4 &ypical 'ceanographic %onditions

13

3. WATER QUALITY

14

3.1 ea(ater )uality

14

3.1.1 Importance o! ea *ater )uality

14

3.1.2 &emperature and alinity &rends

1+

3.1.3 Field Investigations

,age 1


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1+

3.1.4 *ater )uality -esign %riteria

18

3.2 *ater )uality &argets

2"

3.2.1 &otal -issolved olids

21

3.2.2 Boron

22

3.2.3 elly Fish Blooms

23

4. DESIGN LIFE AND AVAILABILITY; PRIMARY FLOWS

24

4.1 -esign $i!e

24

4.2 'perations and #vaila/ility

244.2.1 R' Rack %on!iguration

24

4.3 ,rimary Flo(s

2+

5. SEAWATER INTAKE

20

+.1 ,rimary Flo(s

20

+.2 Intake structure (ith creen o!!shore

20

+.3 #ctive creens /e!ore the ea *ater ,umps

28

+.4 ea *ater ,umping tation

29

+.+ hock chlorination system

,age 2


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32

+. Intake 'ut!all ,ipes

32

+..1 ,ipe acking

33

+..2 ain acking tation

33

+..3 Inter5acks

34

+..4 lurry ystem

34

6. PRETREATMENT SYSTEM

3+

.1 ,retreatment ,rocess

3+

.2 ea *ater )uality &reatment ,rocesses

3+.2.1 6ey *ater )uality ,arameters 7 ,re5&reatment

3+

.2.2 &he ,re5&reatment ,rocesses5 cheme

30

.3 p %orrection

30

.4 %oagulation

30

.+ Flocculation

38

. $amella ettlers

39

.0 -issolved #ir Flotation -#F:

4"

.8 ;ltra!iltration ;F:

43

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.9 ;ltra!iltration *ater torage

44

7. REVERSE OSMOSIS PLANT

4+

0.1 'vervie( o! R' ,lant

4+

0.2 ,umping ystem -esign and ,ressure %ontrol

4+

0.3 %artridge Filtration

40

0.4 '


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8.2 -isin!ection

1

9. CHEMICAL SYSTEMS

0

9.1 #ntiscalant

8

9.2 %ar/on -io


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1".1 ,rocess (ater storage

09

1".2 ,rocess (ater trans!er pump station

09

11. SEAWATER OUTFALL

8"

11.1 'ut!all ,ipeline

8"

11.2 -i!!users

8"

12. POWER AND CONTROL

81

12.1 ,o(er supply

81

12.1.1 Background

81

12.1.2 -esign %onsiderations

81

12.1.3 11" k 11 k u/station (ithin the ,lant premises

82

12.1.4 ,umping station electrical (orksC controls and electrical systems

82

12.1.+ =mergency po(er generation

83

12.1. =lectrical =?uipment

83

12.2 %ontrol ystem

84

12.2.1 Aeneral -esign %riteria

84

12.2.2 ,lant 'peration ethods

8+

12.2.3 %ontrol ystem #rchitecture

,age


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8+

13. CIVIL, BUILDING AND STRUCTURAL WORKS

8013.1 ,lant Buildings

80

13.1.1 Aeneral

80

13.1.2 ,lat!ormsC #ccess *ays and tair(ays

88

13.1.3 $i!ting -evices

88

13.2 Road (orks

88

13.3 ite ervices

89

13.4 torm (ater -rainage

8913.+ Fire ystems

89

14. PRODUCT WATER MAIN

9"

14.1 #nneing and pump capacity !or ++" $-

9

14.1.2 ,ipe si>ing and pump capacity !or 2 D 20+ $-

99

14.1.3 ,ipe si>e and pump capacity !or 4"" $-

1"2

14.1.4 ,ipe si>e and pump capacity !or 1+" $-

1"+

15. BENEIFTS OF LONGTERM O!M CONTRACT

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1"8

Executive Summary

Survey Data

Significant findings in respect of Field Work and Historical Data gathering

including the data of existing 100 MD !eemeli SW"# are as follo$ing%

1. Sea Water &uality is poor'

( )SS measured in *uly+,ugust -01. on the sea/ed offshore from erur

for the proposed 200 MD SW"#3 $as4 on average4 5.'. mg+4 and 26'5

mg+ at the surface'

( )he specification for the !emmeli desalination plant nominates a design

range for )SS of 70 mg+ to -00 mg+' 8y comparison4 the desalination

plant for Sydney is designed for )SS of 5 mg+'

( 9ntake $ater &uality data from !emmeli plant $as provided for the period

from and including May -01. to early Decem/er -01.' )he data sho$s

poor $ater &uality on a num/er of occasions as evidenced /y fre&uent

spikes in tur/idity' )hese spikes in tur/idity resulted in plant shutdo$n on

1. days in the period of record ( ie a loss of production on 5: of days of

record'

9n *uly -01. the !emmeli plant $as closed for 7 days; the $ater &uality

data sho$s that there $as no discerni/le change in salinity in this period'

9n the first $eek of Decem/er -01. the plant $as closed for 2 consecutive

days; the $ater &uality data sho$s that the salinity dropped significantly

over this period indicating the influx of fresh $ater4 $hich contained high

levels of suspended solids'

( )here is strong evidence that


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( 9n literature4 algal /looms have /een documented along /oth the $est and

east coasts of 9ndia' 9t can /e expected that algal /looms $ill impact upon

a desalination plant at erur from time to time'

3. ongshore sediment transport is generally to the north /et$een ,pril and

#cto/er4 and to the south from !ovem/er to March' )he influence of

littoral drift is significant and the annual net drift takes place in a northerly

direction'

re>treatment rocesses

( High levels of )SS4 algae and treatment

plant must /e designed to maintain a high &uality feed to the desalination

plant4 over the long term'

( 8ecause of the -0 mg+ of )SS4 /ut $ould not

/e capa/le of handling greater than 57 mg+ of )SS' For this reason

amella settlers4 preceded /y coagulation>flocculation and polymer

dosing have /een suggested' 9t is expected that the amella settlers $ill

significantly reduce the )SS4 /ut $ill /e only partially successful inremoving the larvae4 algae and


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filtration processes'

( , D,F loading rate of 6 m+hr has /een nominated4 $hen operating $ith -0:

recycle' )he nominated recycle rate is high4 cf 10 to 1- m+hr at other plants4

so as to /e a/le to handle the anticipated high solids loading rate' o$er

recycle rates $ill /e availa/le to the operator $hen the $ater &uality is good'

( )he D,F $ill /e follo$ed /y ?ltrafiltration ?F34 due to space constraints' )he

gross flux shall /e 70MH'

"# lant

Mem/rane Flux and #verall "ecovery

)he "# plant is a single stage+single pass design $ith an overall recovery of

2@: specified'

SW"# mem/rane elements of 6>inch diameter have /een selected' Each

pressure vessel $ill house eight mem/rane elements' )he design treated $ater

)DS for the "# plant is .00 mg+' 9n siAing the "# plant4 an average mem/rane

flux of approximately 1.'7 +m-+hour MH3 has /een selected' )he provision

of 6: spare space for more mem/ranes provides the flexi/ility to reduce the

flux if $arranted4 to reduce cleaning fre&uency or reduce po$er consumption'

umping System Design and ressure =ontrol

8ased on preliminary mem/rane pro


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suita/le to cover the re&uired mem/rane pressures for average to maximum

salinity events' For feed $aters $ith /elo$ average salinities further controls

$ill /e re&uired in the form of a H throttling valve4 essentially C/urning>off

excess energy created /y the pumping system upstream'

ota/ilisation

)his design nominates a target alkalinity of 20 to @0 mg+ as oppose to the 9S#

standard of -00 mg+ CDesira/le3' )his is /ecause at this alkalinity4 a positive

angelier 9ndex is achieved4 $hich is the minimum re&uirement for addressing

the risk of corrosive $ater' Higher target alkalinity4 $hile desira/le as it $ould

further reduce the risk of corrosive $ater /y minimising pH change in the final

$ater3 $ould re&uire additional sta/ilisation chemicals4 and therefore additional

cost' )he nominated target alkalinity thus represents a /alanced approach

/et$een $ater &uality and cost'

roduct Water Main

,ll pipes a/ove 1'1 m dia have /een proposed as =ar/on Steel $ith internal and

external lining4 $hereas all pipes /elo$ 1'1m are stated to /e Ductile 9ron $ith

internal == lining'

,age 11


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1. INTRODUCTION

1.1 Bac!"#$%&

%hennai etropolitan *ater upply and e(erage Board %*B: is the

statutory /ody responsi/le !or providing (ater supply and se(erage in!rastructure

to the entire city o! %hennaiC and although its present operation is limited to the

%orporation %ity limitC the Board is e


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# maor component o! the sea(ater ?uality assessment study is to carry out a

sea(ater ?uality monitoring program to characterise sea(ater !or the proposed

sea(ater intake as (ell !or engineering and process design o! the plant.

&o !ul!il the assignmentC data on sea (ater ?ualityC temperatureC salinityC and

seasonal (ater ?uality (as collected and is presented in sections /elo(.

1.3 Ba-/)-"/

&he data collected !rom the survey reports o! e


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2. SITE CONDITIONS

2.1 S(-) A")c(a-(#%

&he proposed site !or 1+" $- desalination ,lant is located (ithin the premises o!

e


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'(! 2S(-) #ca-(#% (- "),)c- -# "##,)& 400 MD P)"$" D),a*(%a-(#%

P*a%-

&he site !or the proposed 1+" $- is spread over an area o! around 9 acreC

placed (ithin the premises o! e


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2.2 '(%(,)& '*##" )+)*

&he !inished !loor level o! e


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'(!$") 4 Ra(%a** #%-*/ a+)"a!),

2.4 T/(ca* Oc)a%#!"a(c C#%&(-(#%,

&he oceanography o! this region is in!luenced /y 3 climatic conditions vi>.C

south(est monsoon une 7 eptem/er:C northeast monsoon id 5 'cto/er to

id 5 arch: and a !air (eather period id 5 arch to ay:. &he coast is more

in!luenced /y the northeast monsoonthan other t(o seasons. *ave action is

high during northeast monsoon and

cyclonic period. torm surge at emmeli has /een estimated to /e up to 4 metres

a/ove chart datum ie appro


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"# WATER QUALITY

3.1 S)aa-)" $a*(-/

3.1.1 I#"-a%c) # S)a Wa-)" $a*(-/

6no(ledge o! sea(ater ?uality and varia/ility diurnal and seasonal: is important

!or the engineering o! *R' desalination plants. &he inherent sea(ater ?uality

and composition is a !undamental !actor in the entire process technology o! a

desalination plantC !rom pre5treatment selection to process plant designC

remineralisation re?uirements and impacts on the disposal o! /rine. &hese !actors

o!ten have a decisive impact on /oth capital investment costs and operation and

maintenance e


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3.1.2 T))"a-$") a%& Sa*(%(-/ T")%&,

&he siteC located on the %oromandel %oast on the (estern side o! the Bay o!

BengalC e


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Ta;*) 1 '()*& I%+),-(!a-(#%, < S)aa-)" $a*(-/

Pa"a)-)" U%(- A+)"a!) a- S$"ac) A+)"a!) a-B#--#

1 &emp. H%: 28.4 20.9

2 &- mgl: 3+C1"" 3+C2""

3 alinity ppt: 34.0 34.0

4 p 8.2" 8.21

+ -' mgl: .1 +.89

B'- mgl: 2.+1 1.83

0 %'- mgl: 2+." 39.3

8 %olourC a>en ;nits 10.0 18.0

9 'dour 'dourless 'dourless

1" &aste alty alty11 &otal #lkalinity as %a%'3 mgl: 111.0 11."

12 &otal ardness as %a%'3 mgl: 130 "38

13 Bicar/onate mgl: 120.8 12.3

14 & mgl: 48.0 03.3

1+ &ur/idity &;: 1.1" 1.88

1 '25 mgl: ".4+ ".90

10 '35 mgl: 2.8 4."8

18 &otal itrogen mgl: 11.8 14.+

19 ,'45, moll: ".0 ".93

2" &otal phosphorus moll: 1.4+ 1.3

21 35 moll: ".2" ".18

22 agnesium as g mgl: 1191 12+8

23 %alcium as %a mgl: 30 40

24 %hloride as %l mgl: 183"2 18+"2

2+ ,otassium as 6 mgl: 30+ 391

2 ulphate as '4 mgl: 20+8 2808

20 ulphide as 2 mgl: M"."1 M"."1

28 %olloidal ilica mgl: M"."2 M"."2

29 Reactive ilica as i'2 mgl: ".84 1.38

3" Free Residual %hlorine mgl: M".2 M".2

31 Fluoride as F mgl: 1.49 1.3

32 'il @ Arease mgl: M2 M2

33 ,henolic compounds as %+'

mgl:

M"."1 M"."1

34 Barium as Ba mgl: M".+ M".+

3+ Boron as B mgl: 3.2+ 3.10

,age 2"


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3 %admium as %d mgl: M"."1 M"."1

30 %yanide as %n mgl: M"."+ M"."+

38 Iron as Fe mgl: M"."1 M"."1

39 $ead as ,/ mgl: M"."1 M"."1

4" anganese as n mgl: M"."+ M"."+

41 elenium as e mgl: "."22 "."23

42 &otal #rsenic as #s mgl: M"."1 M"."1

43 Ninc as Nn mgl: "."92 "."88

M indicates /elo( the detection limit.

emmeli 7 2"13G 7 Intake (ater ?uality data !rom emmeli plant (as taken !or the

period !rom and including ay 2"13 to early -ecem/er 2"13C see Figure /elo(.

&he data sho(s poor (ater ?uality on a num/er o! occasions as evidenced /y

!re?uent spikes in tur/idity. &hese spikes in tur/idity resulted in plant shutdo(n on

13 days in the period o! record 7 ie a loss o! production on 0L o! days o! record.

In uly 2"13 the emmeli plant (as closed !or + daysO the (ater ?uality data sho(s

that there (as no discerni/le change in salinity in this period. In the !irst (eek o!

-ecem/er 2"13 the plant (as closed !or 4 consecutive daysO the (ater ?uality data

sho(s that the salinity dropped signi!icantly over this period indicating the in!lu< o!

!resh (aterC (hich contained high levels o! suspended solids.

.

,age 21


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3.1.4 Wa-)" $a*(-/ D),(!% C"(-)"(a

&he sea (ater ?uality adopted !or design purposes is ta/ulated in and &a/le 3 andis /ased on the (ater ?uality sampling program as cited a/ove

In the PormalE values are /ased on the average data gathered !rom the !ield. &hePinimalE and Pa


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Ta;*) 2 S)aa-)" $a*(-/ = D),(!% C"(-)"(a

C"(-)"(a D),c"(-(#% U%(-

N#"a* = ;a,)&#% ()*&

)a,$"))%-,

M(%($ <

a-)&

Ma>($ <

a-)&*ater &emperatures

5 sur!ace H% 28.4 2." 3"."

5 /ottom H% 20.9Q 2+." 32."Q

&ur/idity &; M1" 1" 12+

&otal uspended olids mg$ 0+ +" 2""

p 8.2 0.0 8.+

&otal -issolved olids mg$ 3+C2"" 32C""" 38C"""oteG Q &he design o! the R' ,lant (ill make provision !or a rise in sea(ater temperature o! 1o%

resulting !rom the energy input at the pumps.

In &a/le 3: the design values !or the proposed plant are stated here(ith.

Ta;*) 3 S)aa-)" $a*(-/ = D),(!% C"(-)"(a = D(,,#*+)& S#*(&,

C"(-)"(a D),c"(-(#% U%(- N#"a* = ;a,)& #%a+)"a!) ()*&)a,$"))%-,

&emperature H% 20.9

&otal -issolved olids mg$ 3+C2""

Bicar/onate %'3: mg$ 12.3

agnesium as g mg$ 12+8

%alcium as %a mg$ 40

%hloride as %l mg$ 19C240

,otassium as 6 mg$ 391

ulphate as '4 mg$ 2C808

Reactive ilica as i'2 mg$ 1.38

Fluoride as F mg$ 1.3

Barium as Ba mg$ "

Boron as B mg$ 3.10

odium a mg$ 1"C089

itrate '3 mg$ 4 #mmonium mg$ ".2

,age 23


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3.2 Wa-)" $a*(-/ Ta"!)-,

%*B has speci!ied that the (ater ?uality targets shall /e as per I 1" +""G

1991 rea!!irmed in 1993:. &he ?uality parameters as per I 1" +"" 7 1991 are

indicated in &a/le 4. It is to /e noted that the (ater ?uality re?uirements !all into

t(o groupsC P=ssential %haracteristicsE and P-esira/le %haracteristicsE.

Ta;*) 4 D"(%(%! Wa-)" $a*(-/ R)?$("))%-, a, )" IS 10 500 = 1991

S*. N# S$;,-a%c) #" c.a"ac-)"(,-(c R)?$("))%-

E,,)%-(a* C.a"ac-)"(,-(c,

i. %olorC a>en unitsC a


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guideline value has /een posted on the *' *ater anitation and ealth (e/site

atG (((.(ho.int(aterSsanitationShealthd(?chemicals/oronen. &he ne(

guideline value o! 2.4 mg$ (as /ased on a human health point o! vie(. &he level

(as derived /ased on an assumption that 4" per cent o! a " kg adultEs total daily

intake o! /oron is a result o! drinking 2 litre o! (ater having a /oron concentration

o! 2.4 mg$ and a Psa!ety !actorE o! "


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or /y letting them pass !reely. PTo prevent jelly fish from flowing in with water

current, fish netting is proposed to e installed in front of the water inta!e where

inlet velocity is low. This method is adopted at many power stations including

Tarapur "tomic #ower Station including e$isting S%R& plantsE.

4. DESIGN LIFE AND AVAILABILITY; PRIMARY

FLOWS

4.1 D),(!% ()

&he in!rastructure (ill /e designed !or a li!e in e


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+" years !or civil (orksC /uildings @ /uried pipeline componentsO

+" years !or concrete tanks.

2+ years !or mechanical and electrical e?uipmentO

2" years !or !le


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#s sho(n in &a/le + space has /een provided in the R' racks !or additional ,sC

(hich may /e installed to respond to operational and environmental changesC as

(ell as to compensate !or deviations !rom the design o! the plant or e?uipmentper!ormances. &he additional ,s (ould not /e installed to increase the capacity

o! the trains a/ove the design valueC /ut should /e used to ensure maintenance o!

the design capacity o! the trains.

&he R' /uilding (ill /e designed to house si< trainsC in a single ro(. &here shall

/e no stand/y train.

4.3 P"(a"/ '*#,

Based on the proposed operation and availa/ility o! the plant as descri/ed a/oveC

primary !lo(s have /een calculated and are ta/ulated /elo( in &a/le . It is to /e

noted that these !lo(s are not the !inal design !lo(s and can /e e


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Q 43L selected to provide a conservative estimate o! !lo( !or hydraulic design.

,rocess design is /ased on 4L recovery.

5. SEAWATER INTAKE

5.1 P"(a"/ '*#,

&he intake system (ill /e designed to have a hydraulic capacity o! 394 $-C

(hereas the sea (ater pumping station (ill /e designed to have a peak capacity o!

39+ $-C (herein 1." $- re?uired !or screen (ashing (ill /e returned upstream

o! screen.

&he intake conduits shall /e si>ed (ith 1"L additional capacity to take care !or

/io5gro(th (hich shall result in reduction o! carrying capacity. &here!ore the inlet

pipe shall /e si>ed !or a !lo( o! 43+ $-.

&he intake conduit shall /e o! 21"" mm I-: diameter and the outlet conduit shall

,age 3"


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/e o! 14"" mm I- diameter to produce 1+" $- permeate capacity. &he velocity

in the conduit at peak !lo( (ill /e 1.4+ ms. Friction losses at this velocity (ould

/e o! the order o! 1.+51. metre in a pipeline 9+" metres long.

'ne out!all (ill /e provided (ith an internal diameter o! 14"" mm. For a !lo( peak!lo( o! 242 $-C the velocity (ill /e 1.82 ms. Friction losses at this velocity (ould

/e o! the order o! 1.852." metre in a pipeline +" metres long.

&he e


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&he advantage o! providing the screens /e!ore the pumps is to capture the elly

!ish that /ypass the o!! shore screen and !ishing net on the shore aliveC thus

preserving the same and returning them to the sea in order to have a sustaina/le

ecosystem.

# typical /and screen installation is sho(n in '(!$") 8 /elo(.

Band screens have /een in service !or screening sea (ater !or many years. &hey

provide e!!icient removal (ith relatively lo( maintenance costs and also have

%onstruction costs that are relatively lo( as compared to the total plant cost.

&hrough5!lo( /and screens have /een proposed here(ith. &ypically mesh si>es

vary !rom 2 mm to 1" mmC andC in vie( o! the marine /iomass pro/lems at

emmeliC a mesh si>e o! 3 mm has /een selected.

Ta;*) 7 Ba%& Sc"))% D),(!% Pa"a)-)",

Pa"a)-)" U%(-, a*$)

ea(ater !lo( $- 39+

,age 32


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-uty 2

tand /y 1

ea *ater Flo( ,er screen $- 198

tainless teel mesh mm 3

#pproach %hannel *idth m 4."

*idth Back opening m 2.853 m

%hannel #pproach elocity ms ".8+5".9"

;pstream (ater depth m 2.2

-o(nstream (ater depth m 1.8

*ash *ater per screen $s 1+52"

5.4 S)a Wa-)" P$(%! S-a-(#%

&here shall /e one num/er o! 2C1"" mm internal diameter intake conduit. &he

conduit shall /e constructed /y pipe acking !rom an onshore pitC (hich (ill

/ecomeconverted into the sea (ater pumping station once the conduits have

/een installed.

ertical sha!t pumps in a (et (ell are particularly suita/le !or sites (ith a lo( tidal

rangeC such as is e


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ean $o( *ater eaps ".43 R$ 7 ".22

ean $o( *ater pring ".14 R$ 7 ".+1

'nshore survey levels are recorded as metres a/ove ean ea $evel. &husean igh *ater prings is 1.1+ 7 ".+ T R$ ".+C and ean $o( *ater prings is

".14 7 ".+ T R$ 7 ".+1.

&he lo( no !lo( level in the pump (ell has /een taken as R$ 7 ".+". #t a !lo( o!

39+ $- in intake conduitC the hydraulic grade line entering the proposed pumping

station (ill /e appro


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• Isolation valves along (ith !lo( meters shall /e installed main and /ranch

mani!olds.

&hese pumps are ertical &ur/ine pumps (ith large clear passages. &he intake

screen and net at the intake (ill prevent the ingress o! material like to cause a

/lockage. -esign parameters are set out in &a/le 8

Ta;*) 8 GS)a Wa-)" I%-a) P$,

Pa"a)-)" U%(-, a*$)

,umping tation %apacity $- 39+

*et *ells 5 1

-uty ,umps 5 3

tand/y 5 2

ean igh *ater prings R$ ".+

ean $o( *ater prings R$ 5 ".+1

Intake %onduit loses at peak !lo( m 1.051.8

,ipe diameter 5 ,ump to mani!old m 1.1

ain Rising main diameter m 2."

,ump house ,linth $evel R$ 0."

• Aeneric type o! pumpG vertical sha!t mounted in pump (ellC

• aterialsG super duple< stainless steelC ,=R o U 43

• =?uipment per pump unitG isolation valvesC non5return valve and magnetic !lo(

meterC

• ,ump motorsG electric varia/le speedC

• ,ump station controlG /y plant ,$% /ased upon target !lo( rateC

• ,umpe?uipment removalG /y ='&C

5.5 S#c c*#"(%a-(#% ,/,-)

# shock chlorination system is proposed to minimise marine gro(th in the inlet

,age 3+


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pump station and pressure main. %riteria adopted !or the shock chlorination

system are summarised /elo(O

• &ype o! chemicalG chlorine gas through acuum %hlorinate

• a< chlorine solution residual in inlet mainG 8 mglC

• in chlorine solution residual in inlet mainG 1 mglC

• -osing timeG 2 hour per dayC

• -osing pointG '!! shore inlet (ellC

• For the same 4+ kghr 3 * 1: acuum %hlorination is provided

5.6 I%-a) O$-a** P(),

acking pipes shall /e o! precast concreteC designed and manu!actured to meet

the re?uirements o!G

• B+911 peci!ication !or rein!orced concrete acking pipes (ith !le


37/112

Interim Report

to delivery.

5.6.1 P() ac(%!

&he tunnel shall /e constructed /y pipe acking techni?ues using a purpose made

&B !or e


38/112

Interim Report

spacing o! 3"" m. &he seal shall /e adusta/le to e


39/112

Interim Report

6.2 S)a Wa-)" $a*(-/ T")a-)%- P"#c),,),

&he key (ater ?uality parameters relevant to the selection o! pre5treatment

processes includeG

• &otal uspended olids

• &ur/idity

• arine BiomassC elly !ishC larvae and algae

'ther relevant !actors areG

• %ape<

•'pe<

• =ase o! operation

• Ro/ustness

6.2.1 K)/ Wa-)" $a*(-/ Pa"a)-)", = P")


40/112

Interim Report

sur!ace indicates that the suspended solids have a density slightly higher than sea

(ater. ince the sea(ater intake is located near the sea/edC the /ottom

suspended solids readings are ?uite relevant to the design o! the pre5treatment

system.

Ma"(%) B(#a,,

arine /iomass includes elly !ishC larvae and algae. &he presence o! these

materials is highly varia/le and dependent on seasonC temperature and the

presence o! nutrients.

o(everC operational e


41/112

Interim Report

6.3 C#"")c-(#%

&he sea(ater (ill /e dosed (ith acid to achieve the optimum p !or coagulation.

&he dosing system (ill consist o! duty and stand/y dosing lances into each pre5

treatment train. &he p correction design parameters are summarised in &a/le9 /elo(.

Ta;*) 9 C#"")c-(#% D),(!% Pa"a)-)",

Pa"a)-)" U%(-, a*$)

-esign ma


42/112

Interim Report

&herea!ter the !locs are removed /y processes such as !loatation and !iltration.

%oagulant (ill /e dosed at the head o! $amella ettler /lock. Rapid mi(%! D),(!% Pa"a)-)",

Pa"a)-)" U%(-, a*$)

-esign ma


43/112

Interim Report

&ype o! mi


44/112

Interim Report

o. o! settlers os. 8

$amella &ype and aterial ,lates&u/es made !rom FR,

(ith ++"5"" inclination (ith

hori>ontal

$amella ur!ace loading rate

vertically proected sur!ace area:

mhr M1+

$amella upports %oncrete

Bottom ludge Removal%hain and !light scrapers or

hydraulic vacuumO material o!

construction to /e suita/le !or

sea(ater

%lari!ied (ater collection%oncrete troughs (ith

triangular FR, (eir plates

6.7 D(,,#*+)& A(" '*#-a-(#% DA'

-issolved air !loatation -#F: is a high rate process using micro5/u//les to !loat

coagulated and !locculated particles to the sur!ace o! a clari!ication /asin. #

portion o! the clari!ied (ater is dra(n o!! and passed through a pressure vessel

(here the (ater is saturated (ith air at high pressure. &he pressuri>ed (aterC

supersaturated (ith airC is released into the (ater as it enters the /ottom o! the

/asin. &he sudden release o! pressure causes the !ormation o! micro5/u//les

(hich attach to the pre!ormed !loc and carry it to the sur!ace (here it !orms a thick

!loating layer. &he !loat is skimmed o!!C and the clari!ied (ater passes to !iltration.

-#F in general ade?uately removes & o! 0+ mg$C /ut a/ove 1"" mg$ there is

likely to /e a higher carryover o! solids to the !iltersC resulting in shorter run times.

&he potential !or short !ilter runs can /e o!!set to some e


45/112

Interim Report

permitsC pilot plant testing at siteC should /e carried out to provide data on the most

suita/le loading rate.

-#F a !orm o! physical treatment o! (ater that involves coagulating impurities then

removing these solids /y using dissolved air to !loat them to the sur!ace o! the(ater. Residual !ine particles that are not !loated o!! are removed /y the !iltration

do(nstream.

&he !lotation cell also re?uires occasional sludge removal to remove settled solids.

&he -#F process is proven across the glo/e !or a range o! (ater treatment

applications including as a pre5treatment process in sea (ater desalination plants

!or removal o! !ine solids and organics. It also copes (ell (ith algae /ecause it is

removed in the !lotation stepC eliminating the possi/ility o! !ilter /linding. #simpli!ied cross sectional schematic is as sho(n /elo(.

Flocculation

Flotation

Raw

water

Air saturated water

Filtered water

Sludge

Filtration

Flocculation

Flotation

Raw

water

Air saturated water

Filtered water

Sludge

Filtration

.

Ta;*) 123 D(,,#*+)& A(" '*#-a-(#% D),(!% Pa"a)-)",

Pa"a)-)" U%(-, a*$)

-esign sea(ater !lo( $- 39+ (ithout recycle$- 404 (ith recycle

um/er o! -#F %ells o. 22

-#F sur!ace loading

rate

#ll units online mhr 8 (ith recycle:

'ne unit o!!line mhr 8.+ (ith recycle:

-#F area per cell m2 9+

-#F Recycle Rate L 2"

-#F #ir -ose Rate mg$ 1"

,age 4+


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Interim Report

Pa"a)-)" U%(-, a*$)

#ir aturator =!!iciency L 9"

#ir aturator ,ressure Aauge: k,a 8"" nominal:

um/er o! air saturator o. 22

aturator volume $ 0C+"" at 9" s detention time 5

+"L !ull at 2"L recycle:

Float Removal &ype ydraulic !loat removal and (eir:

-#F recycle (ater (ill /e dra(n !rom the R' !ed tank i.e. ;F !iltered (ater.

6.8 U*-"a(*-"a-(#% U'

em/rane !iltration involves passing the (ater to /e treated through a thin polymer

!ilm called the Vmem/raneW. &he !iltration process is loosely re!erred to as

micro!iltration i! the si>e o! pores in the mem/rane is a/out ".2 micron.

I! the pores are smaller than approontal con!igurations are

,age 4


47/112

Interim Report

possi/le in ;F like R'. ,ressure systems are typically supplied as modular skid

mounted systems (ith skids varying in si>e depending on the duty re?uirement.

Ta;*) 14 U*-"a '(*-"a-(#% D),(!% Pa"a)-)",

'*# -# S)*<

C*)a%,(%! (*-)",

MD 388

A,,$)& ")c#+)"/ "# (*-)", 99.5

'*# (%*)- -# U' MD 386

U' R)c#+)"/ Ra-) : 92.5

'*$> MH 50

T#-a* N$;)" #

,(&,

!os' 32

D$-/ !os' 30

S-a%&;/ !os' 2

'*# Ra-) -# RO MD 356

A")a # )ac ,(& m- 17.5 > 4.5

I%(-(a* TMP 8ar 0.5

6.9 U*-"a(*-"a-(#% Wa-)" S-#"a!)

Filtered (ater i.e. ;F permeate storage (ill /e located immediately do(nstream o!

the ;F unit. &his (ill serve as !eed tank to Reverse 'smosis.

&he tank has /een si>ed to provide t(enty minutes storage at a sea(ater !lo( o!

388 $-.&he /ack(ash (ater !or ;F shall also /e (ithdra(n !rom the same tank.

&he design parameters !or the Filtered ea(ater torage &anks are summarised in

&a/le /elo(.

'(*-)")& S)aa-)" S-#"a!) D),(!% Pa"a)-)",

Pa"a)-)" U%(-, a*$)

-esign sea(ater !lo( $- 388

,age 40


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Interim Report

um/er o! tanks o. 1

Fill time min 2"

%apacity $tank +.+

,age 48


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Interim Report

7. REVERSE OSMOSIS PLANT

7.1 O+)"+() # RO P*a%-

&he R' plant (ill /e a single stagesingle pass design (ith an overall recovery o!

4L.

&he plant (ill /e con!igured as si< num/ers o! individual trains. =ach o! the si< R'

trains (ill consist o! one R' rack eachC (ith dedicated pumping system and

=nergy Recover -evices =R-s:. &he plant is to /e designed such that !ull

production can /e achieved through si< trains. &he trains (ill /e con!igured to

allo( !or each individual train to /e isolated !or cleaningC maintenanceC or mem/rane replacement. o(ever 2 sets o! stand/y =R-C ,, and /ooster

pumps have /een proposed.

*R' mem/rane elements o! 85inch diameter have /een selected. =ach

pressure vessel (ill house eight mem/rane elements.

&he design treated (ater &- !or the R' plant is 3"" mg$. o allo(ance has

/een made in the R' plant layout !or a second pass R' system.

In si>ing the R' plant an average mem/rane !lu< o! appro


50/112

Interim Report

;nder such design the R' Booster pumps (ould provide !eed pressure

adustments suita/le to cover the re?uired mem/rane pressures !or average to

ma


51/112

Interim Report

,re!erence to have maority o! pumping capacity driven /y a !i


52/112

Interim Report

Ta;*) 15 RO a%& ERD '))& B##,-)" P$, D),(!% Pa"a)-)",

Pa"a)-)" U%(- RO '))& B##,-)"

P$

ERD '))& B##,-)"

P$

um/er o! pumps per R' train o. 1 1

&otal num/er o! pumps !or 1+"

$- module

o. 8 8

a


53/112

Interim Report

Ta;*) 16 (! P"),,$") P$, D),(!% Pa"a)-)",

Pa"a)-)" U%(- a*$)

um/er o! pumps per R' train o. 1

&otal num/er o! pumps o. 8

a


54/112

Interim Report

Ta;*) 18 ERD B##,-)" P$, D),(!% Pa"a)-)",

Pa"a)-)" U%(- a*$)

um/er o! pumps per R' train o. 1

,age +4

Pa"a)-)" U%(- a*$)

um/er o! =R- systems per R' train o. 1

&otal num/er o! =R- systems o. 8

um/er o! =R- units per system o. +

&otal num/er o! units o. 4"

&ype o! system 5 Iso/aric ystem

&ype o! energy recovery device 5 -*==R

anu!acturer o! device 5 %alder #A

-esign !lo( rate Brine: $- ." per -*==R unit:

$s 9

a


55/112


56/112

Interim Report

um/er o! R' racks o.

R' ,lant Recovery L 4

aterial o! mem/ranes ,olyamide

&ype o! mem/ranemodule 8 inch spiral (ound

em/rane manu!acturer ydranauticsC -o(

#ctive area per mem/rane element m2 41 44" !t2:

R' mem/rane !lu< rate ormal $ 13.+

a


57/112

Interim Report

&he piping material !or the R' system is as sho(n in &a/le 2"

Ta;*) 20 P((%! a-)"(a*,

P((%! Ma-)"(a*

igh pressure !eed piping tainless steelC super

duple


58/112

Interim Report

same time. &he amount and type o! cleaning chemical re?uired (ould vary

depending upon the degree o! mem/rane !ouling and the nature o! the !ouling.

-epending on the mem/rane selectedC the system may /e designed to ena/le

cleaning o! the R' system !rom /oth directionsC i.e. !rom the !ront to the /ack and

!rom the /ack to the !ront. &his (ould allo( employing speci!ic cleaning

procedures !or a particular type o! !ouling scaling. &he %I, system (ill /e si>ed

to clean each individual R' rack separately. &he systemC including the chemicals

!or the %I, (ill /e located in a dedicated /uilding located ne


59/112

Interim Report

Pa"a)-)" U%(- a*$)

um/er o! pumps o. 2*1

Flo( capacity o! each pump $s 3""

,umping head /ar 1"

um/er o! stages o. 1

-esign parameters !or the !lushing pumps are sho(n in &a/le 23.

Ta;*) 23 '*$,(%! P$, D),(!% Pa"a)-)",

Pa"a)-)" U%(- a*$)

um/er o! pumps o. 1*1

Flo( capacity o! each pump $s 29+

,umping head m 3

um/er o! stages o. 1

7.9 P)")a-) S-#"a!)

'ne permeate storage tanks (ill /e located immediately do(nstream o! the R'

plant. &he tanks have /een si>ed !or at least 2" min storage at the ma


60/112

Interim Report

,age "


61/112

Interim Report

8. POST TREATMENT

,ost treatment o! permeate is re?uired to meet the statutory product (ater ?ualityre?uirements. ,ost treatment (ill consist o! remineralisationsta/ilisation and

disin!ection o! the (ater.

8.1 R)


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Interim Report

8.1.2 /&"a-)& () G Ca";#% D(#>(&)

*ater shall /e sta/ilised /y the addition o! car/on dioation.

=?uipment typically re?uired !or dosing o! lime (ould consist o!G lime storage silosC

mi


63/112

Interim Report

and alkalinity /y 1." mg$ as %a%'3: each. &here!oreC !or a target

recommended dosage o! alkalinity and hardness in the product (ater o! 1"" mg$C

the (ater produced /y the desalination system (ill need to /e treated (ith 04 mg$

o! lime and 88 mg$ o! car/on dio


64/112

Interim Report

%ar/on dioer

&ype =lectric

%apacityC horsepo(erkg

%'2.day

"."37"."+

-elivery pressuretemperatureC

/arsH%

3 /ars12H%

apor eater

&ype =lectric

%apacityC horsepo(erkg

%'2.day

"."17"."2

K)/ &),(!% C"(-)"(a Ca";#% D(#>(&) a%& '))& S/,-)

&he dosage o! car/on dio


65/112

Interim Report

proportionally to the desalinated (ater !lo( rate /y !lo( control valves installed on

the gas !eed lines !rom the vapori>er to the point o! chlorine dioone slo(ly /ecoming more popular. %hlorine dio


66/112

Interim Report

micro/iological contamination. &he reverse osmosis treatment process (ill remove

the maority o! organic matter present. &his results in a limited amount o! short

chain car/on compounds availa/le as a !ood source !or micro5organism gro(th.

o(ever to have a residual chlorine in the distri/ution net(ork chlorination isenvisaged !or the treated (ater out o! the proposed plant.

Theory of disinfection and 'hlorination

&he rate o! change in the num/er o! via/le organisms is the product o! the reaction

rate constant !or particular disin!ectants and the num/er o! via/le organisms

&e//uttC 1992:. It is e


67/112

Interim Report

Rearranging the !ormula to determine the time re?uired !or the ade?uate disin!ection is

eero no matter ho( much

disin!ected the (ater isC the percentage o! removing micro5organisms can never /e 1""L.

o(everC maority o! the (ater treatment plants must /e a/le to remove or inactivate

99.9L 35log: o! Aiardia cysts and 99.99L 45log: o! viruses %ritttenden et al.C 2""+:.

ome micro5organisms are more vulnera/le and have less resistance to certain

disin!ectants there!ore only 9"L 15log: reduction is re?uired.

For e!!ective disin!ection there are numerous parameters that are re?uired !or killing

or inactivating micro5organisms. &his includes the residual concentrationC the time at

(hich the (ater is in contact (ith the disin!ectantC the (ater temperatureC the p /alanceC

and the type o! disin!ection used.

I! the concentration o! disin!ectantC %C measured in milligrams per litre mgl:C and

the contact timeC &C measured in minutesC are multiplied together it (ill produce a

value kno(n as the %& value. &his value is re?uired to produce ade?uate parameters in

order to achieve the re?uired log re?uirements. -i!!erent micro5organisms (ill re?uire

di!!erent %& values there!oreC in generalC the contact time and the concentration o! the

disin!ectant must /e a/le to remove the most resistant o! the micro5organisms. It is

important !or the (ater system to have an ade?uate %& value so that the (ater is treated

properly /e!ore /eing distri/uted.

In alkaline conditionsC chlorine is more

e!!ective and in acid conditionsC the

hypochlorous acid is more e!!ective.

&here!ore it is recommended that the

typical p !or disin!ection should /e

lessmthan 8 and i! chlorine is usedC

then a lo(er p is /etter.

%hloramineC (hich can /e !ormed

during a chlorine and ammonia


68/112

Interim Report

chemical reactionC is a com/ined residual chlorine and is also an use!ul disin!ectant.

Break point occurs once all the ammonia is reacted and the com/ined residual

chlorine is converted /ack to !ree chlorine Re!er !igure a/ove:. Increasing the chlorine

concentration also increases the !ree5chlorine residualC ho(ever increasing it /eyond the

/reak point is counterproductive due to the production o! nitrogen and nitrogen tri5

chlorideC chemicals that have a strong unpleasant odour.

&he /reak point is a good indicator (hen to supply su!!icient amounts o! chlorine to remove

any eardous properties o! chlorine and should have a

good grasp o! the /asis o! preventive measures. &his (ill make them more conscious

a/out sa!ety (hich (ould not /e achieved i! they are trained to !ollo( certain instructions

mechanically. In IndiaC %hlorine is deemed to /e^ an e


69/112

Interim Report

Aovernment o! IndiaC it is necessary to o/tain a storage license (hen !ive or more

containers are to /e stored. For o/taining the storage license sa!ety e?uipments are

essential along (ith scru//er system. #lso the /uilding has to /e constructed as per

norms suita/le !or storing toardous

%hemicals RulesC 1989 ma


70/112

Interim Report

S)c((ca-(#% # C*#"(%) T#%%)"

*ater %apacity appro


71/112

Interim Report

%hlorine Aas ,ost treatment !or disin!ection

process @ pota/le product (aters:

Ferric %hloride %oagulant

ydrated $ime ,ost treatment !or (ater sta/ilisation

Flotation #id 5 ,olyelectrolyte -#F !locculation aid

%lari!icationFiltration #id 5

,olyelectrolyte

$ime(ater clari!ication aid

odium ydro


72/112

Interim Report

*# "a-)

A%-(,ca*a%- c#%c)%-"a-(#% 100

'#" # ,$*/ 1000 IBCD#,) "a-) ! 0.7

D#,(%! #(%- RO (! P"),,$")

P$ ,$c-(#% a(%

A%-(,ca*a%- c#%,$-(#% !&a/ 250

S)c((c !"a+(-/ # ,(%!

,#*$-(#%

1.2

D#,(%! *# "a-) #

a%-(,ca*a%-

" 9

N$;)" # ,(%! $, D$-/ N#. 5

S-a%&;/ N#. 3

D#,(%! $ caac(-/ " 2

N$;)" # a%-(,ca*a%- ,-#"a!) -a%, N#. N#%) = &(")c- ))&

"# IBC

It is not proposed to dilute the antiscalant as the !lo( rates involved can /e easily

dosed accurately and dilution can lead to degradation o! the antiscalant. #de?uate

mi(&) D#,(%! U%(-, a*$)


73/112

Interim Report

%ar/on -io


74/112

Interim Report

&otal %hlorine %onsumption ae kg 9""

a


75/112

Interim Report

lime (ater /e!ore dosing to permeate upstream o! product (ater. $ime does not

dissolve ?uickly in (ater and is di!!icult to handle. $ime is mi


76/112

Interim Report

!locculation tank. &he speci!ic polymer to /e used (ill /e determined during a later

design stage. &he dosing design parameters are summarised in ta/le 34

Ta;*) 34 '*#-a-(#% A(& P#*/)*)c-"#*/-) D#,(%! D),(!% Pa"a)-)",

Pa"a)-)", U%(-, a*$)

-esign sea(ater !lo( $d 39+

,oly olution trength ominal L (v ".1 7 ".+

-osing $ocation ;s o! $amella

;s o! -#F

-ose Rate per dosing

point:

inimum mg$ "."+

a(&) D#,(%!

Pa"a)-)" U%(-, a*$)

ydro


77/112

Interim Report

o. o! &anks o 2

&ank olume 6$tank 1+"

-osage location Inlet o! %artridge !ilter -osage 2+ ml average

9.8 S#&($ M)-a;(,$*(-)

odium /isulphite B: a'3: (ill /e prepared /y dissolving sodium

meta/isulphite B: a22'+: in (ater. -osing o! /isulphite is re?uired to

remove residual chlorine !rom the system resulting !rom intake shock dosing as

(ell as to neutralise o


78/112

Interim Report

o o! -osing pump 9 *4

%apacity o! each pump 12+ $hr

9.9 S$*$"(c Ac(&

&he sulphuric acid (ill /e used to provide p correction !or optimum sea(ater

coagulation. In addition sulphuric acid is re?uired !or chemical enhanced

/ack(ashing and cleaning o! the ;F mem/ranes. &he design parameters are

summarised in &a/le 30.

Ta;*) 37 S$*$"(c Ac(& S/,-) D),(!% Pa"a)-)",

Pa"a)-)" a*$)

ulphuric acid concentration L (( 98

peci!ic gravity o! dosing

solution

1.84

S)aa-)" C#"")c-(#%

-esign sea(ater !lo( 39+

-ose rate &ypical 3+

-osing !lo( rate o! chemical &ypical 3+" $hr.

-osing point ea(ater intake pipeline

upstream o! coagulant dosing


79/112

Interim Report

9.10 U*-"a '(*-"a-(#% C)(ca*,

Ta;*) 38 U*-"a '(*-"a-(#% c)(ca* U,a!),

Pa"a)-)" a*$)

'


80/112

Interim Report

Aeneral storage space only has /een included !or these chemicals /ecauseG

It (ill not /e kno(n until the !irst year or t(o: o! operation (hich o! the

chemicals are re?uiredO

&he chemicals are used in!re?uently say once per year:O and

*hen usedC only small volume o! chemical is used each time.

&he !acility (ill /e designed to meet the re?uirements o! all o! the chemicals that

may /e used. Bet(een usesC the !acility (ill need to /e drained and !lushed.

-esign details are provided in the !ollo(ing ta/le.

Ta;*) 39 M(,c)**a%)#$, CIP C)(ca* D#,(%! S/,-) D),(!% Pa"a)-)",

Pa"a)-)" U%(-, a*$)

-osing point R' %I, &ank

peci!ic gravity o! dosing solution varies

um/er o! dosing pumps -uty o. 1

tand/y o. 1

-osing pump capacity k$hr 2

um/er o! tanks o. 2

&ank volume k$tank 3

%hemical delivery volumes ultiple 1"""$ IB%s

9.11.1 C*)a%(%!


81/112

Interim Report

!eaturesG

• ake5up tankO

•

%hemical storage and dosing !acilities !or the preparation o! various cleaningsolutions typically includes %austic odaC %itric #cidC a--C odium

Bisulphite:O

• Recycling pumpsO

• %artridge !ilter typically + micron:O

• ,ipe(ork allo(ing each R' train to /e cleaned individuallyO and

•

I! re?uiredC holding tank to neutralise spent cleaning solution and ena/ledischarge to environment.

9.11.2 '*$,(%!

#!ter chemical cleaning and prior shutdo(n o! mem/rane trains the /rine and

spent cleaning solution should /e !lushed out o! the R' and =R- racks using R'

permeate. Flushing prior train shutdo(n (ill reduce potential !or scale /uild up and

corrosion.

&he !lushing system (ould consist o! !lushing pumps and pipe(ork allo(ing each

R' train to /e !lushed individually.


82/112

Interim Report

% WATER STORAGE AND TRANSFER

10.1 P"#c),, a-)" ,-#"a!)

&reated process (ater (ill /e stored on site prior to /eing trans!erred to the city !or

consumption. &he criteria !or the storage tank are summarised /elo(O

&otal usa/le storage volume 2+" 3

um/er o! units G 1 < .2+$ 1 hours storage !or 1+" $- average !lo(:C

aterial o! construction G R%% epo


83/112

Interim Report

• ,eak Flo( G 242 $-C

• -iameterG 14"" mm I- R%% pipe

• a< (orking pressure including (ater hammer allo(ance:G

2"m headC

ote Q

&he head re?uired to discharge sea(ater concentrate is provided /y the residual sea(ater

concentrate pressure a!ter the reverse osmosis process. &his pressure (ould other(ise /e !ully

recovered and there!ore has to /e supplemented to make up !or the loss o! head to the outlet

pipeline. &he out!all pipeline can there!ore /e considered as consuming energy as (ith a pump

station: (ith an associated operating cost.

11.2 D($,)",

&he outlet pipeline (ill discharge sea(ater concentrate and other (aste !lo(s into

the ocean via a system o! di!!users. &hese comprise a large num/er o! small

diameter no>>les discharging ets o! sea(ater concentrate !rom the sea/ed into

the (ater /ody to entrain dilution !lo(s. *ider dispersion o! the saline plume is

achieved through the action o! (indC (aves and currents. Both the sea(ater

concentrate ets and the dispersion (ill /e modelled using appropriate computer models. &he adopted criteria !or the di!!user design is summarised as !ollo(sO

• Flo( range ` peak G 242 $-C

• -ischarge temperature rangeG "% U 3% a/ove am/ientC

• -ischarge salinity rangeG 32C+""mgl 534C+""mgl a/ove

am/ientC

• &arget dilutionG +L a/ove am/ient salinityC

• *ater depthG U +m (ith no sur!ace e


84/112

Interim Report

12.1.1 Bac!"#$%&

&he po(er supply arrangement !or the desalination plant is /ased on provision o!

one nos 1 no.: 11" k !eeders !rom a su/station ne


85/112

Interim Report

=arthing

,rotection

(itchgearC etc.

I=% Rules re?uirements (ill also /e considered in the design.

12.1.3 110 11 S$;,-a-(#% (-(% -) P*a%- ")(,),

# 11" k 11 k trans!ormer shall /e provided !or the electrical supply to the

sea(ater intake pumpsC the reverse osmosis high pressure pumps and the

process (ater trans!er pumps. &he $.& supply shall /e !rom & ,anels. &his

su/station (ill /e a dou/le /us /ar Aas Insulated ystem type AI: /uilt (ith the

latest technologiesC ma


86/112

Interim Report

inimum cross sectionG po(er 2C+ mm

,o(er !actor measured in 11k (ill /e more than ".9+ (ith !ilters i! necessary.

12.1.5 E)"!)%c/ #)" !)%)"a-(#%

Battery /acked ;, systems (ill /e provided !or instrumentationC telemetryC

emergency lighting and communication systems.

&he -% and ;, system shall /e redundant 2 < 1""L /atteriesC 2 < 1""L

22"-% recti!iersC 2 < 1""L 24-% convertersC 2 < 1""L 23"# inverters:C -%

system shall /e si>ed !or a minimum period o! 2 hour o! stand/y operation.

'ne emergency diesel generator =-A: set shall /e provided. &he =-A shall /e

mounted in an outdoor soundproo! metallic canopy (ith anti5vi/ration supports and

a high grade eardC ca/le trays (ill /e

protected /y sheet steel covers. &he ca/le inlet to the e?uipment (ill /e protected

(ith tight stu!!ing /o


87/112

Interim Report

control system and the design (ill take into account the !ollo(ing re?uirementsG

&he ,rocess %ontrol ystem ,%: architecture covering the connection o! !ield

instrumentsC controllers and associated inputoutput I':C uman achine

Inter!aces I:C communication net(orks and net(ork e?uipment (ill /e

designed !or a process plant availa/ility o! at least 98L. &his implies that that

the control system itsel! (ill have a system availa/ility o! at least 99.9LO

;se o! e?uipment (ith a proven track recordO

,rovision o! redundancy !or critical itemsO

Redundant controllersC net(orksC po(er supplies in all locationsO

=nsuring maintaina/ility o! selected e?uipment and standardisation o! e?uipment

and sparesO

Fi/re optic (ill /e provided as the primary /earer to link all units.

,rocess controls and e?uipment designed to !ail to the sa!est conditionO

I' @ instrument voltages selected to suit e?uipment and provided (ith /attery

/ackup.

#ll on site po(erC control and communication ca/les to /e run in accordance (ith

current industry practicesC codesC standards and regulationsO

;ninterrupti/le po(er supply ;,: provided to all critical items instrumentsC

control systems and telecommunications systems (ith a one hour /attery /ack5

up (ith emergency po(er supply to ;,Es (ithin 1+ minutes:.

Field instrumentation (ill /e rated I,+ and (ill have outdoor housing protection

!rom (eather.

$ightning protection (ill /e provided !or all !acilities. urge protection is to /e

considered !or all !acilities to provide protection to communications and other

electronic /ased e?uipment.

12.2.2 P*a%- O)"a-(#% M)-#&,

&he !ollo(ing aspects o! the plant operation (ill /e taken into account in the design

o! the control systemC alarm systemC supervisory system and system

communications.


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Interim Report

#ll plant operations (ill /e designed !or automatic operation and minimal

re?uirement !or manual interventionO

&he desalination plant and process (ater pump station (ill /e monitored 24

hours per dayO

'utside o! the manned hours o! the desalination plant and pump stationC

operations or maintenance (ill only /e in response to automated alarm

noti!ication to nominated personnel on callO

For /ackup to the automated alarm noti!ication outside o! manned hoursC the site

(ill also have 24 hour monitoring o! all operating parameters and alarmsO

'perating protocols (ill /e esta/lished such that only the desalination plant (ill

have control Vo(nershipW o! the complete (ater supply system.

12.2.3 C#%-"#* S/,-) A"c(-)c-$")

&he !ollo(ing are the minimum re?uirements o! the control systemG

&he desalination plant (ill /e controlled /y its o(n stand alone control system.

&his (ill include all e?uipmentC ca/lingC /uildings and services necessary !or a

complete systemO

&he ,rocess %ontrol ystem ,%: (ill /e o! the same manu!acturerC makeC

modelC !irm(are as that used !or the magnetite process plant and (ill !ollo( the

same con!iguration programming criteria and standardsO

&he %ontroller architectureC communication protocol and ca/ling selected (ill /e

suita/le !or the application and control system re?uirements in terms o!

!unctionalityC speedC dura/ilityC o!! site monitoring and control re?uirementsC

servicea/ilityC and local supportO

&he I inter!ace system on site (ill /e suita/le !or the applicationC control

system re?uirements in terms o! !unctionalityC speedC dura/ilityC local supportO

#ll I systems (ill display alarmsC alarm histories and trends. #ll data must /e

stored !or more than t(elve monthsO

#ll ,% and communication systems (ill have at least 2"L spare memoryC I'

and communication capacityO

=ach controlla/le drive (ill have a local control station comprising an emergency


89/112

Interim Report

stop hard (ired in the emergency stop circuitry !or the drive (hich is not

disa/led in auto mode:C a local stop /utton and a local start /utton !or starting

the motor under maintenance manual mode o! operation:. &his local control

station (ill include a og /utton (hen appropriate !or some mechanical

e?uipmentO

&he ,% (ill incorporate monitoring o! key alarms !or other plant au


90/112

Interim Report

%"# CIVIL, BUILDING AND STRUCTURAL WORKS

13.1 P*a%- B$(*&(%!,

13.1.1 F)%)"a*

&he desalination plant (ill include the !ollo(ing /uildingsG

Intake ,ump ouse

-#F -issolved air !lotation: /uilding

;F Building inc. ;F !ed ,umps and el!5%leaning !ilters

R' ,lant Building inclusive o! %artridge Filters pressure vesselsC /ooster and

, pumps and energy recovery:O

#dministration and %ontrol BuildingO

%hemical -osing BuildingsO

%hlorine BuildingO

=lectrical (itchgear Buildings u/station.

Buildings (ill generally /e o! concrete !oundation sla/sC sheet metal cladC insulated

and suita/le !or cyclonic conditions (ith a design li!e o! 3" years. Buildings shall

comply (ith the relevant Indian Building %ode.

Buildings (ill /e provided (ith internal po(erC communicationsC lightsC air

conditioningC ventilationC (aterC air and se(erage disposal !acilities as (ell as

e?uipment and !urnishings to provide !ully !unctional !acilities.

&he Finished Floor $evel FF$: shall /e a minimum o! 3"" mm a/ove the e


91/112

Interim Report

=?uipment /uildings (ill /e provided (ith appropriate doors to suit the operation o!

the plant including removal and replacement o! all e?uipment. ome /uildings (ill

/e provided (ith precast concrete (alls to reduce noise levels and provide heat

insulation.

13.1.2 P*a-#",: Acc),, Wa/, a%& S-a("a/,

,lat!ormsC access (ays and stair(ays (ill /e included in the design to allo(

su!!icient access !or operations and maintenance. $adders (ill /e avoided

(herever possi/le.

13.1.3 (-(%! D)+(c),

$i!ting devices (ill /e included in the design (here necessary. &hese (ill include

electrically operated %ranes ='&Es: !or removal o! pumps and air /lo(ers etc.

Aantry cranes (ill /e provided R' /uildings and the %hlorine /uilding. o/ile

cranes (ill /e re?uired to move pumping and other e?uipment to a suita/le truck

loading area.

13.2 R#a& #",

&he desalination plant area (ill /e designed as a largeC evenly graded area (ith

provision !or ade?uate access to the plant such that vehicles (ill not need to cross

open drains. Arading around the plant (ill /e arranged to ensure drainage a(ay

!rom the plant at an appropriate grade to minimise the potential !or ponding or

!looding.

*orking areas around the desalination plant (ill /e sur!aced in a road /ase or

appropriate capping layer to provide all5(eather hard standing areas !or

maintenance tra!!ic. #reas o! signi!icant tra!!icC such as around (orkshops and

o!!ices and roads /et(een !acilities plus roads surrounding and internal to the

process plant shall /e /itumen sealed. #ny areas that are sensitive to vehicle

impactC in particular /uilding edgesC (orkshop door openings etcC e


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Interim Report

#ll underground electrical ca/le in ducts conduit (ill have concrete ca/le pits at

changes o! direction. &hese pits (ill /e provided (ith remova/le concrete covers at

plate level capa/le o! taking the load !rom the outrigger o! a +" t rough terrain

crane. &he covers (ill /e levelled to the !ished road level.

#ll Internal roads shall have a minimum carriage (idth o! ." m. Roads (ill /e

(ider in areas adacent to chemical storage !acilities to allo( a chemical truck to /e

unloading (ithout restricting through tra!!ic. Road (idening (ill also /e re?uired at

/ends to provide su!!icient room !or turning o! a trailer. Road cross !all shall

generally /e designed at 2L !or sealed pavements and +L !or unsealed (ith

vertical and hori>ontal alignment to /e designed in accordance (ith 'R&pu/lications.

13.3 S(-) S)"+(c),

#ll electrical and communication services (ill /e located in suita/le underground.

ite pipe(ork (ill /e /uried (here !easi/le.

13.4 S-#" a-)" D"a(%a!)

$ocal drainage design around /uildings (ill /e /ased on a 1 in + year average

recurrence interval. %ollector drains (ill /e /ased on a 1 in 2" year return period

and over5all site drains (ill /e designed !or 1 in 1"" year rain!all intensity. -rainage

!lo(s (ill generally /e handled /y drains mostly covered. &he drainage design (ill

/e checked !or a 1 in 1"" year average recurrence interval rain!all event to ensure

that no !acilities including electrical e?uipment: su!!er any permanent damage

!rom such a storm.

torm (ater drainage !rom all !acilities shall /e contained and directed into run5o!!

channels. -rainage !rom process over!lo(s (ill /e returned /ack to the process.

13.5 '(") S/,-),

Fire services (ill /e compati/le (ith the re?uirements o! ealthC a!ety and

=nvironment and relevant standards.


93/112

Interim Report

14. PRODUCT WATER MAIN

ound planning dictates the standard design criteria in the planning and design o!

pumping transmission mains. ,ipelines are designed in accordance (ith the

maed to carry

(ater during these events (ithout e


94/112

Interim Report

maintained in the pipe. enceC !or closed conduits the hydraulic grade line slopes

according to the head loss.

&here!oreC pipe si>ing is /ased upon taking consideration o! !ollo(ing !actorsG5 )uantum o! !lo( ) in mYs:

Fluid velocity in ms:

,ressure m in terms o! (ater column:

ead loss m in terms o! (ater column:,ipe material

%5!actor a>en5*illiams coe!!icient o! !riction dependent on pipe material:

&he governing e?uation is given /yC

-T [4Q)bQ:\ 12

*hereC

-T Internal -ia. '! pipe m:

)T !lo( mYs:

T velocity o! !luid ms:

&ransmission /y pumping is applied in cases (hen the (ater has to /e transported

over large distances andor to higher elevations. &he pumping head is the total

headC and comprises the static head plus the !riction head loss !or the design !lo(

rate. &he pump to /e selected must /e a/le to provide this head at rated !lo(.

&he head loss corresponding to the design !lo( rate can /e computed !or several

pipe diameters using odi!ied a>en *illiam =?uation.

h T [$ ) %R: 1.81\ 994.2Q-4.81\

%R T pipe roughness coe!!icient

- T internal diameter o! pipe in mO

h T !riction head loss in mO

$ T length o! pipe in mO and

) T !lo( in pipe in m3 s

=ach com/ination o! the pumping head and corresponding pipe diameter should

/e capa/le o! supplying the re?uired !lo( rate over the re?uired distanceC and up to

the service reservoir. maller pipe diameters (ill re?uire a higher pumping head to


95/112

Interim Report

overcome the increase in head lossesC and the other (ay round. #s a resultC one

pipe diameter (ill represent the least cost choice taking into account the initial

costs capital investment:C maintenance costs and the energy costs !or pumping.

&he total costC i.e. the capitali>ed taking /oth capital and operational cost as the

least and economicalC shall /e the /asis !or selecting the most economical pipe

diameter. &here!oreC pipe si>ing is /ased upon engineering standards !or

accepta/le energy i.e. !riction loss T loss o! pressure: loss related to the intended

use o! the pipe transmission main.

For this analysisC the

calculated costs !or

di!!erent pipe si>es

shall /e are plotted

as in a graph sho(n

as side. &here!oreC

(hen the capital cost

and the operation

cost are added the

concave up curve is

derived. &he point o! in!lection indicates the minimum total %ost. From this point

dra( a vertical line that (ill intersect the D5a


96/112

Interim Report

Based on historical per!ormanceC li!e e


97/112

Interim Report

resistant due to coatings applied inside and outside. oreoverC this pipe material

may /e su/ect to scale /ursts (hen tapped (ithout su!!icient skill. #lternative

materials are in this case igh5density polyethylene ,=:.

igh5density polyethylene ,=: is a very suita/le pipe material !or small5diameter

mains /ecause it can /e supplied in coil. &he potential o! laying this pipe in longer

lengths reduces the num/er o! necessary oints. ,articularly in cases (here rigid

pipe materials (ould necessitate a considera/le num/er o! special parts such as

el/o(s and /endsC the !le


98/112

Interim Report

e?ual to 1.1 m shall /e -I (ith internal %% lining and outside !usion /onded epo


99/112

Interim Report

14.1 A%%)>$")

14.1 .1 P() ,((%! a%& $ caac(-/ #" 550 MD

Caac(-/ 550.00 MD

6.37 MHS

ENFT 60000 M

C 0.8 <

TOTA STATIC EAD 6 M

PIPE MATERIA MS IS 2062

DESIFN EOCITY UNITCACUATED DIA

J MSEECTEDDIA J M

ACTUAEOCITY

MSC1.81 99 4.62 D4.81

STATICEAD

REUIRED PUMPEAD INCUDINF

MINOR OSS 10 IN LML

SEECTEDPUMP EAD M

EAD INK!C

1 2.84940980 2.9 ".9 42.9 994.2 10.+41 1+.30 22.91 23."" 2.34

1.1 2.0144+8399 2.8 1."3 42.9 994.2 141.+24 18.2" 2."2 20."" 2.0+4

1.2 2.+9889"+4 2. 1.2" 42.9 994.2 99."8810 2+.99 34.+9 3+."" 3.+0

1.3 2.49938+3 2.+ 1.3" 42.9 994.2 82."+243 31.39 4".+3 41."" 4.182

1.4 2.4"11"2"4 2.+ 1.3" 42.9 994.2 82."+243 31.39 4".+3 41."" 4.182

1.+ 2.324+23298 2.4 1.41 42.9 994.2 0.42424 38.2" 48."2 49."" 4.998

1. 2.2+"01"""+ 2.3 1.+3 42.9 994.2 +4.94281 4.88 +0.+ +8."" +.91

1.0 2.183+"9431 2.2 1.0 42.9 994.2 44.329 +8."+ 9.8 0"."" 0.14

1.8 2.121989043 2.2 1.0 42.9 994.2 44.329 +8."+ 9.8 0"."" 0.14

1.9 2."+3931+ 2.1 1.84 42.9 994.2 3+.40111 02.1 8+.80 8."" 8.002

2 2."13"9220 2.1 1.84 42.9 994.2 3+.40111 02.1 8+.80 8."" 8.002

2.1 1.94+8"0++ 2 2."3 42.9 994.2 28."+138 91.81 1"0."" 1"0."" 1".9142.2 1.919411941 2 2."3 42.9 994.2 28."+138 91.81 1"0."" 1"0."" 1".914

2.3 1.800221912 1.9 2.2+ 42.9 994.2 21.9182 110.+1 13+.2 13."" 13.802

2.4 1.83090"24 1.9 2.2+ 42.9 994.2 21.9182 110.+1 13+.2 13."" 13.802

,age 99


100/112

Interim Report

S.N#. Pa"-(c$*a", '#"$*aS/;#* U%(- #-(#%(((

#-(#%<>(+

#-(#%<>+

A P() ,((%! ;a,)& #% (%-) "%a* & ), (!% "), ,$")

#.1 S)*)c-)& () ID ID 29"" 28"" 2"" 2+"" 2+"" 24"" 23"" 22"" 22"" 21"" 21"" 2""" 2""" 19"" 19""

#.2 P() OD OD 294" 284" 234.4 2+34.4 2+34.4 2434.4 2332 2232 2232 2132 2132 2"32 2"32 1928.4 1928.4

#.3 D),(!% P"),,$") Dp !,?c 2.34 2.0+4 3.+0 4.182 4.182 4.998 +.91 0.14 0.14 8.002 8.002 1".914 1".914 13.802 13.802

#.4D),(!%

T))"a-$")Td &)!.C +" +" +" +" +" +" +" +" +" +" +" +" +" +" +"

#.+ A**#a;*) ,-"),, Sa!,?c

!1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43

#.C#""#,(#%

a**#a%c) #" ca";#% ,-))*

C c ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1

#.0W)*& #(%-

)(c()%c/ #" ERW (),

@ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+

#.8/ ac-#" a, )"

ASME B31.1 -a;*)104.1.2A

/ ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4

#.9M(%($

ca*c$*a-)& ()-(c%),,

Tc D > OD >0.12 > / > D Sa > @ C > 10

8.19 0.9 0.+" 0.28 0.28 0."+ .82 .+9 .+9 .30 .30 .14 .14 +.9" +.9"

#.1"M(** %)!a-(+)

-#*)"a%c) #" ()-(c%),,

M 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+

#.11

M(%($ ")?$(")&a** -(c%),,

a-)" c#%,(&)"(%!(** -#*)"a%c)

T Tc 1 <M100

9.3 9.1" 8.+0 8.31 8.31 8." 0.09 0.+3 0.+3 0.28 0.28 0."2 0."2 .0+ .0+

A.12

S)*)c-)&-(c%),, # ();a,)& #% (%-)"%a*

*#a& -(c%),,ca*c$*a-(#%

Ts 20 20 17.2 17.2 17.2 17.2 16 16 16 16 16 16 16 14.2 14.2

,age 1""


101/112

Interim Report

,age 1"1


102/112

Interim Report

14.1.2 P() ,((%! a%& $ caac(-/ #" 2 Q 275 MD

Caac(-/ 275.00 MD

3.18 MHS

ENFT 60000 M NOTE

C 0.8 < 1 TWO PIPES EAC ACCOMODATINF 275 MD : TE ENTIRE SYSTEM 2 > 275 MD COMPRISINF 4W 2SPUMPS. RE'ER SCEMATIC DIAFRAM PROIDED IN TE SEET.TOTA STATIC EAD 6 M

PIPE MATERIA MS IS 2062

DESIFN EOCITY UNITCACUATED

DIA J MSEECTEDDIA J M

ACTUAEOCITY

MSC1.81 994.62 D4.81

STATICEAD

REUIRED PUMPEAD INCUDINFMINOR OSS 10

IN LML

SEECTEDPUMP

EAD M

EADIN

K!C

1 2."13"9220 2.1 ".92 12.18 994.2 3+.40111 2".01 28.08 29."" 2.9+8

1.1 1.919411941 2 1."1 12.18 994.2 28."+138 2.18 34.8" 3+."" 3.+0

1.2 1.83090"24 1.9 1.12 12.18 994.2 21.9182 33.+1 42.8 43."" 4.38

1.3 1.0+"219 1.8 1.2+ 12.18 994.2 1.89899 43.40 +3.81 +4."" +.+"8

1.4 1.0"130842 1.8 1.2+ 12.18 994.2 1.89899 43.40 +3.81 +4."" +.+"8

1.+ 1.438180 1.0 1.4" 12.18 994.2 12.8380 +0.22 8.94 9."" 0."38

1. 1.+914923"0 1. 1.+8 12.18 994.2 9.+8990 0.+9 9".2+ 91."" 9.282

1.0 1.+4390432 1. 1.+8 12.18 994.2 9.+8990 0.+9 9".2+ 91."" 9.282

1.8 1.+""403330 1. 1.+8 12.18 994.2 9.+8990 0.+9 9".2+ 91."" 9.282

1.9 1.4"4+3+"2 1.+ 1.8" 12.18 994.2 0."3"0" 1"4.40 12".92 121."" 12.342

2 1.423403994 1.+ 1.8" 12.18 994.2 0."3"0" 1"4.40 12".92 121."" 12.342

2.1 1.38918304 1.4 2."0 12.18 994.2 +."4+101 14+.+9 1.1+ 10."" 10."34

2.2 1.3+02292 1.4 2."0 12.18 994.2 +."4+101 14+.+9 1.1+ 10."" 10."34

2.3 1.32039343 1.4 2."0 12.18 994.2 +."4+101 14+.+9 1.1+ 10."" 10."34

2.4 1.299448"20 1.3 2.4" 12.18 994.2 3.+32381 2"0.94 234.03 23+."" 23.90

,age 1"2


103/112

Interim Report

S.N#. Pa"-(c$*a", '#"$*aS/;#* U%(- #-(#%

#-(#%<>(

#-(#%<>((

#-(#%<>(((

#-(#%<>(+

#-(#%<>+

A P() ,((%! ;a,)& #% (%-)"%a* &),(!% "),,$")

#.1 S)*)c-)& () ID ID 21"" 2""" 19"" 18"" 18"" 10"" 1"" 1"" 1"" 1+"" 1+"" 14"" 14"" 14"" 13""

#.2 P() OD OD 214" 2"4" 1934.4 1834.4 1834.4 1034.4 132 132 132 1+32 1+32 1432 1432 1428.4 1328.4

#.3 D),(!% P"),,$") Dp !,?c 2.9+8 3.+0 4.38 +.+"8 +.+"8 0."38 9.282 9.282 9.282 12.342 12.342 10."34 10."34 10."34 23.90

#.4D),(!%

T))"a-$")Td &)!.C +" +" +" +" +" +" +" +" +" +" +" +" +" +" +"

#.+ A**#a;*) ,-"),, Sa!,?c

!1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43 1311.43

#.C#""#,(#%

a**#a%c) #" ca";#% ,-))*

C c ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1 ".1

#.0W)*& #(%-

)(c()%c/ #" ERW (),

@ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+ ".8+

#.8/ ac-#" a, )"

ASME B31.1-a;*) 104.1.2A

/ ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4 ".4

#.9M(%($

ca*c$*a-)& ()-(c%),,

Tc D > OD >0.12 > / > D Sa > @ C >

10

.39 .10 +.93 +.01 +.01 +.48 +.2+ +.2+ +.2+ +."2 +."2 4.09 4.09 4.08 4.++

#.1"M(** %)!a-(+)-#*)"a%c) #"

() -(c%),,M 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+ 12.+

#.11

M(%($")?$(")& a**

-(c%),, a-)" c#%,(&)"(%! (**

-#*)"a%c)

T Tc 1 <M100

0.31 0."+ .08 .+2 .+2 .2 ."" ."" ."" +.04 +.04 +.48 +.48 +.40 +.2"

A.12

S)*)c-)&-(c%),, #

() ;a,)& #%(%-)"%a* *#a&

-(c%),,

ca*c$*a-(#%

Ts 20 20 17.2 17.2 17.2 17.2 16 16 16 16 16 16 16 14.2 14.2

,age 1"3


104/112

Interim Report

14.1.3 P() ,() a%& $ caac(-/ #" 400 MD

,age 1"4


105/112

Interim Report

Caac(-/ 400.00 MD

4.63 MHS

ENFT 60000 M

C 0.8 <

TOTA STATIC EAD 6 M

,I,= #&=RI#$: I 2"2

DESIFN EOCITY UNITCACUATED DIA

J MSEECTEDDIA J M

ACTUAEOCITY

MSC1.81 994.62 D4.81

STATICEAD

REUIREDPUMP EADINCUDINF

MINOR OSS10 IN LML

SEECTEDPUMP

EAD M

EAD INK!C

1 2.42088+4"1 2.+ ".94 23.99 994.2 82."+2429 10.4 2+.4" 2."" 2.+2

1.1 2.3148909"1 2.4 1."2 23.99 994.2 0.424242 21.4 29.1 3"."" 3."

1.2 2.2134""2 2.3 1.11 23.99 994.2 +4.942813 2.34 34.90 3+."" 3.+0

1.3 2.1293931 2.2 1.22 23.99 994.2 44.3288 32.2 41.88 42."" 4.284

1.4 2."+193000 2.1 1.34 23.99 994.2 3+.401112 4".8" +".88 +1."" +.2"2

1.+ 1.9823"129 2 1.40 23.99 994.2 28."+1383 +1.+9 2.0+ 3."" .42

1. 1.919411941 2 1.40 23.99 994.2 28."+1383 +1.+9 2.0+ 3."" .42

1.0 1.821"31 1.9 1.3 23.99 994.2 21.918190 ."3 08.3 09."" 8."+8

1.8 1.8"938933 1.9 1.3 23.99 994.2 21.918190 ."3 08.3 09."" 8."+8

1.9 1.01303190 1.8 1.82 23.99 994.2 1.89899 8+.4 1"".2" 1"1."" 1".3"2

2 1.01004231 1.8 1.82 23.99 994.2 1.89899 8+.4 1"".2" 1"1."" 1".3"2

2.1 1.0+4"""90 1.0 2."4 23.99 994.2 12.8380+ 112.04 13"."1 131."" 13.32

2.2 1.388"""4 1.0 2."4 23.99 994.2 12.8380+ 112.04 13"."1 131."" 13.32

2.3 1.""9""22+ 1.0 2."4 23.99 994.2 12.8380+ 112.04 13"."1 131."" 13.32

2.4 1.+0193288 1. 2.3" 23.99 994.2 9.+89901 1+".91 102."" 103."" 10.4

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14.1.4 P() ,() a%& $ caac(-/ #" 150 MD

Caac(-/ 150.00 MD

1.74 MHS

ENFT """" NOTE

C ".8 5 1 ONE PIPE ACCOMODATINF 150 MD : TE ENTIRE SYSTEM WI COMPRISE 3W 2S PUMPS. RE'ERSCEMATIC DIAFRAM PROIDED IN TE SEET.TOTA STATIC EAD

PIPE MATERIA MS I 2"2

DESIFN EOCITY UNIT

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S.N#. Pa"-(c$*a", '#"$*aS/;#* U%(- #-(#%(((#-(#%<

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15. BENEIFTS OF LONGTERM O!M CONTRACT

unicipalitiesutilities enter into long5term '@ %ontract services to achieve a num/er o!

goalsC includingG

• Reducing costsC /oth capital and '@ costsO

• Increasing e!!iciencyO

• =nhancing risk managementO

• eeting capital investment needsO

• #chieving regulatory complianceO

• 'vercoming lack o! local e


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In addition to direct costC complianceC per!ormanceC and !inancial /ene!itsC long5term

contracts !or (ater services can ena/le local leaders to concentrate their energies on other

programs and !unctions. &he day5to5day management o! utility systems has /ecome a/urden in many communitiesC draining pro!essional and management resources that can

/e /etter !ocused on other municipal and community needs. In additionC partnerships lead

to increased accounta/ilityC improved service levelsC capital improvementsC and additional

/ene!its to the community.

&he /asic main o! having long term '@ contracts have %ost aving and #ccounta/ility

#s long5term agreements shi!t responsi/ility !or compliance (ith all regulations to private

providersC many municipal o!!icials !eel a Jpeace o! mindJ kno(ing an ee operations.

FurtherC $ong5term contracts o!ten result in improved per!ormance and more

e!!icient services. ,rivate !irms make greater up5!ront investments in advanced

computers and cutting5edge technologyC kno(ing the costs can /e amorti>ed over a

longer period.

26122013 interim report 150 mld

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