Wastewater recycle and reuse: The need of the hour Workshop Date: 18 April 2012, Ministry of Urban Development, Govt. of India Uday G. Kelkar, Ph.D., P.E., BCEE M. N. Thippeswamy, Chief Engineer (Rted), BWSSB Experience of Bangalore in Reuse – Lessons Learned
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Experience of Bangalore in Reuse Lessons Learnedmohua.gov.in/upload/uploadfiles/files/Bangalore_Reuse_Recycle04.pdf · Wastewater Treatment Number of Wastewater Treatment Plants 12
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Wastewater recycle and reuse:
The need of the hour Workshop
Date: 18 April 2012,
Ministry of Urban Development, Govt. of India
Uday G. Kelkar, Ph.D., P.E., BCEE
M. N. Thippeswamy, Chief Engineer (Rted), BWSSB
Experience of Bangalore in Reuse
– Lessons Learned
GoK has allocated 600 cusec or 17 Cumecs (1469 Mld) of raw water from Cauvery River to BWSSB, with CWSS Stage IV - Phase I commissioning, raw water drawl is about 929 Mld
Balance raw water available is about 540 Mld
Raw Water (Mld) from Cauvery river
Stage I ( 1974) : 150
Stage II ( 1982) : 150
Stage III ( 1994-95) : 314
Stage IV Phase I (2002) : 315
Stage IV Phase II : 540
Total Abstraction 1469
Source Availability
Water Sources for Bangalore City
Projected Water Demand and
Availability of Fresh WaterBBMP AREA
Year
Population
Million
Demand
in MLD
Available
MLD
Shortfall
MLD
2001 5.4 870 540 310
2007 7.5 1219 840 379
2015 8.8 1720 1500 220
2021 10 2125 1500 615
2036 12.5 2550 1500 1050
Population figures as per CDP
Wastewater Treatment
Number of Wastewater
Treatment Plants
12 (Including 2 Tertiary
Treatment plants)
Total Installed Capacity 718 MLD
Quantity of treated
wastewater
350 MLD
Quantity of usage of
treated water
4 MLD (Supplied to
International Airport, BEL etc.
Treated effluent flowing
into the valleys
346 MLD
Integrated Water Resource
Management
Reuse of Wastewater from
Vrishabhavathi Valley,
Bangalore
UF/GAC Plant
Upgradation of
T.G. Halli WTP
V-Valley –
180+120 MLD
Mailasandra
75 MLD
Kengeri – new
120 MLD
Chodanapura
New 20 MLD
Bangalore City
V-Valley Reuse
T.G. Halli
Reservoir
To Byramangala
Tank
Proposed V. Valley STP Process
Primary
Treatment
Initial
Future
180
MLD Secondary
Treatment
Existing
Tertiary30
MLD
150
MLD
New
Tertitary
To other
reuse
(30 MLD)
To
Tavarkere
(150 MLD)
To other
reuse or
river
(30 MLD)
120
MLD
Down rated to 30 MLD primary effluent
Primary
Treatment
120
MLD Secondary
Treatment
120
MLD
New
Tertitary
To other
reuse or
river
(30 MLD)
120
MLD
Recycle and Reuse of Raw Sewage forRecycle and Reuse of Raw Sewage for
Indirect Potable Use Indirect Potable Use –– Process Flow Process Flow
(Water management scheme in V and K&C Valley)(Water management scheme in V and K&C Valley)
STPs under JBIC
Project with
Nitrification/De-
Nitrification
Tertiary Treatment
as separate add-on
for Phosphorus
removal
Travel in Water
Course for a min of
40 Kms for natural
freshening
Ultra-Filtration
Membrane Treatment
for Entero Virus
Removal
Pumping to Raw Water
Reservoir Site
Further Treatment
through WTP with
Filtration and
Disinfection of
water
Finished Water for
Distribution
Pumping to Fresh
Water Reservoir
Site
Mixing with Raw Water
Reservoir
• 135 MLD of tertiary treated water after chlorination is
pumped to Tavarekere over a 23 km distance.
• This water is is further treated using Ultrafiltration (UF)
followed by Granular Activated Carbon (GAC) process to
produce water that is free from all microbial and viro-
logical contaminants at Tavarekere
• This water is then discharged into Arkavathy River for a
travel of 7 kms for Natural purification and Assimilation
before mixing it with the Existing T. G. Halli reservoir
source. This water will serve as the raw water source for
T.G. Halli WTP
• The Existing T.G. Halli WTP will be renovated using
membrane filtration processes to produce 135 MLD of