This is a presentation from Aban Power Company Limited, one of the finalists at the 5th CII-GBC National Award for Excellence in Water Management in 2008 The awards are in 2 categories, Within the Fence for work done on minimizing the organisations water footprint, and Beyond the Fence for work done in the community around the industry. This presentation was in the "Within the Fence" category. We thank CII and the respective companies for giving us permission to upload these presentations on the India Water Portal website for dissemination to a wider audience.

1. A Presentation
on
EXCELLENCE
IN
WATER MANAGEMENT
2008
By
ABAN POWER COMPANY LIMITED
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12/9/2008 Aban CII_wate r Award 08
COMPANY PROFILE
Part of LANCO group
– Independent Power Project (IPP) with
Natural gas based Combined cycle
power plant of Capacity 119.8 MWH
– Established thro International
Competitive Bidding (ICB) route
– Power supply to the TNEB Grid on
Long-term basis
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12/9/2008 Aban CII_wate r Award 08

2. CDM APPROVED
Smoke free chi m ne y
ØABAN is the First project in the world for a gas
based combined cycle power plant to obtain
CDM tag under AM 0029 methodology.
Ø Registered as CDM Project with UNFCCC on
29th May 2007
VER 2005 – 68946
CER 2006 – 213891
CER 2007 – 215925
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12/9/2008 Aban CII_wate r Award 08
ISO 14001 & OHSAS 18001 CERTIFIED
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12/9/2008 Aban CII_wate r Award 08

3. N ATUR AL
GAS
PROCESS FLOW
G ENER ATOR
C T G
FLUE G AS TO
GAS TU RBINE
ATM OSPH ERE
AIR
HR G
S
FLUE GAS TO
HRS G
BY PASS S TACK
M AIN STAC K
STEA M TO BL
TU RBINE O
ST
G W
D
O
FEED W
WATER TO N
HRS G
GT WAS H / C T
GUA RD PO ND BLO W DO WN
C OND ENSATE
AIR CO OLED C OND ENSO R BAC K TO H RSG
HOT
WEL
L
SO LAR EVAPO RATO N PO NDS
WATER F OM
R R.O PLANT
TWAD BO RAD D . PLANT
M
M AKE UP TO HRSG
REJ ECTS TO
PERM EATE - FO R SO LAR PO NDS
RECY CLE
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12/9/2008 Aban CII_wate r Award 08
WATER CONSERVATION PROJECTS – DESIGN
STAGE
Air Cooled
Dry Low NOX Condenser
Sav ings in m3/yr Sav ings in m3/yr
2006-07 : 148750 2006-07 : 2061368
2007-08 : 148750 2007-08 : 2142673
RWHP
18,000 m3/yr
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12/9/2008 Aban CII_wate r Award 08

4. DRY LOW NOx BURNERS
TYP ICAL PO W ER P LANT ABAN Re marks
Supe r he ate d Ste am is No steam or No Saving on natural
consume d for re ducing the DM wate r re source s
NO x le ve l
Minimum 45 ppm of NO x Maximum of 20 Ne w standard / be nch
le ve l in the emission e ven ppm of NO x in the mark
after Wate r or steam e mission.
inje ction
About 1402 kg/day of NO x About 374 kg/day Le ss pollution – be tte r
e mitte d in the flue gas of NO x is only e nvironment
e mitte d
425 MT/d of steam is No nee d of ste am State of the art
nee de d for re ducing NOx or water technology
le ve l to 45 ppm (max)
Efficie ncy is less Highly e fficie nt Profit and saving on
(more than 47 %)
Aban CII_wate r Award 08 natural resource s.
DRY LOW NOx BURNERS
TYPICAL POWER ABAN Remarks
PLANT
Cost of ste am injection would NIL tre atme nt cost so No impact on
re sult in 4.52 crore s pe r savings is 4.52 crore s e nvironment
annum approx pe r annum approx Re duction in
DM wate r consumption is 335 DM wate r wate r
ltrs / MWH consumption is NIL consumption
litres / MWH En vironme ntal
investment can
Cost of the proje ct – Cost of the proje ct
be paid back
Additional to existing HRSG Rs.16 crores approx
Ze ro discharge
piping
of e fflue nts
Efflue nt gene ration in the No ge ne ration of was possible
steam or DM wate r e ffluent
production
Aban CII_wate r Award 08

5. DRY LOW NOx BURNERS
Method Period Saving of water
DLN B URNERS FOR GAS 2005 – 2006 102000 m3 Rs. 307.2
TURBINE – (eigh t mon ths Lakhs
of operation)
Selected a GT with DLN
burners (GE 6FA Gas
2006 – 2007 148750 m3 Rs. 448
Turbine) in place of
Lakhs
conventional turbine
wi thout DLN
Result: Savings include s the 2007-2008 148750 m3 Rs. 448
cost of production for ste am
using DM wate r, fue l,
Lakhs
chemical dosing and handling
of e fflue nt gene ration &
reduce d e miss ion, water 9
conservat ion
12/9/2008 Aban CII_wate r Award 08
AIR COOLED CONDENSERS
Method Period Saving of w ater
AIR COOLED 2005 – 2006 1353056 m 3 Rs. 406
CONDE NSERS – (eigh t mon ths Lakhs
of operation)
Installed Air Cooled
2006 – 2007 2061368 m 3 Rs. 618
Condensers in place of
conventional cooling towers Lakhs
Result: Consumpti on is 102
litres/MWH instead of 2500 2007-2008 2142673 m 3 Rs. 642
lit/MWH Lakhs
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12/9/2008 Aban CII_wate r Award 08

6. AIR COOLED HEAT EXCHANGERS
Method Period Saving of w ater
AIR COOLED HEAT 2005 – 2006 36000 m 3 Rs. 10.80
EXCHANGERS– (eigh t mon ths of Lakhs
operation )
Installed Air Cooled Heat
Exchangers (ACHE) for 2006 – 2007 51000 m 3 Rs. 15.30
Closed Cooling water Lakhs
system (CCW) in pl ace of
conventional cooling towers
using water resource. 2007-2008 51000 m 3 Rs. 15.30
Result: Consumption is Lakhs
almost NIL requirement of
water; hence saving of 6.07
m 3 /Hr 12/9/2008 Aban CII_wate r Award 08
11
RAIN WATER HARVESTING POND
Method Period Saving of w ater
Storm water reservoir – Rs. 10.8
18000 KL approximate Lakhs –
capacity with 9 percolation Proactive
pits. practice
Utilizing this water as and to enrich
2006-07 & 36000 m 3
when required for water
maintaining: 2007-08 table
14985 trees,
22000 shrubs
11000 hedges
15000 Sq Mt of Lawn
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12/9/2008 Aban CII_wate r Award 08

7. WATER CONSERVATION PROJECTS –
CONTINUAL IMPROVEMENT
Auxiliary Cooling Water
Sav ings in m3/yr
2006-07 : 3240
2007-08 : 3240
Reverse Osmosi s
Sav ings in m3/yr
2006-07 : 2448
2007-08 : 3366
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12/9/2008 Aban CII_wate r Award 08
IMPROVEMENT IN R.O RECOVERY
Method Period Saving of w ater
R.O PLANT Pre treatment- 2006-07 2448 m 3 Rs. 0.74
Feed pH brought down Lakhs
from 7.0-7.5 to 6.0-6.2 by
acid treatment thereby 2007-08 3366 m 3 Rs. 1.01
keeping LS I close to zero or Lakhs
slightly negati ve
Result : Per meate increased
by 0.9 m3 /hr
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12/9/2008 Aban CII_wate r Award 08

8. R.O– Improved performance after pretreatment
modification
EFFLUENT fro m DM ACW, BOILE R
DM
PLANT PL ANT N PIT BLOW DOWN
HRSG
SUMP
HCL
DMF FeCl3
POLY
C. F
GUA RD
POND SETT LING
TANK
HP PU MP
REJE CT
R.O SKID
PERME ATE
R.O Treatment after
modi fications
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12/9/2008 Aban CII_wate r Award 08
C.T – COC INCREASE
Method Period Saving of w ater
By Increase in Cycle of 2006-07 & 6480 m 3 Rs. 3.45
Concentration – COC – in 2007-08 Lakhs
Auxiliary Cooling Tower
from 5 COC to 8 COC
Result:
A) Reduction in consumption
of water by 270 M3/ Month
B) Cost saving in reduction of
chemical treatment Rs.
6044 per month
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12/9/2008 Aban CII_wate r Award 08

9. Raw Water Con sumption
12000
10000
8000
in Kl
6000
4000
2000
0
05
5
06
6
6
07
07
08
7
7
8
08
07
08
06
5
06
6
7
8
-0
r- 0
-0
r -0
-0
-0
-0
-0
r-0
-0
n-
n-
n-
g-
g-
g-
b-
b-
g-
b-
ec
ct
ec
ec
ct
ct
ct
Ap
Ap
Ap
Ju
Ju
Ju
Au
Au
Au
Au
Fe
Fe
Fe
O
O
O
O
D
D
D
Mont hs
Aban CII_wate r Award 08
SPECIFIC WATER CONSUMPTION
Year Annual Water Generation M 3/
Consumption (MWh) MWh
(M 3)
2005 – 06 45200 564298.49 0.08
(8 months)
2006 - 07 45270 858903.454 0.057
2007 - 08 25390 893525.054 0.0284
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12/9/2008 Aban CII_wate r Award 08

10. SPECIFIC WATER CONSUMPTION
Specific Water Consumption
0.09
0.08
0.07
0.06
m3/MWH
0.05
0.04
0.03
0.02
0.01
0.00
2005-06 2006-07 2007-08
Year
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12/9/2008 Aban CII_wate r Award 08
R e c yc le d /Unit G e n e ra tio n in M 3 /M W H
0.0 45
0.0 40
0 .03 8
0.0 35
0.0 30
0.0 25 0.025 0.025
0.0 20
0.0 15
0.0 10
0.0 05
0.0 00
2 005 -0 6 20 06-0 7 20 07-08
Yea r
Aban CII_wate r Award 08

11. GOOD G REE N GOVE RNA NCE A WARD - 2007
Aban CII_wate r Award 08
CII ENE RGY EFFICIE NT UNIT AWA RD - 2008
Aban CII_wate r Award 08

12. IN A NUT SHELL
The project was implemented with:
v Zero Discharge facility
v R.O plant to recycle the effluents & rejects to
solar evaporation ponds
v GT with DLN burners does not require steam
or water
vEnergy and water saving A.C.C & A.C.H.E
system in place of conventional cooling towers
vISO 14001 & OHSAS 18001 Certified
v CDM Approved Project
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Thanks
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