Reasons for pollution of Lakes Un planned growth of city Un sewered pockets such as slums and erstwhile CMC areas Damage of main sewers Blockages and overflows in the sewer system Direct letting out of raw wastewater into storm water drainage system from un-sewered as well as sewered pockets Lack of adequate infrastructure facilities Dumping of solid waste within the drainage zones
Sewerage management in Bangalore Facts Total sewage generated in Bangalore – 1000 MLD Sewerage connections – 8 Lakh Sewerage network Laterals (< 300 mm dia) – 3367 Kms Trunk Sewers (>300 mm dia) – 302 Kms Number of plants – 14 Sewage treatment capacity – 721 MLD Average Present treatment – 453 MLD
Measures for abating Lake Pollution1) Replacement/ Rehabilitation/ Up gradation of old sewerage net work – Laterals and Trunk sewers in core city2) Creation of New Sewerage Net Work Erstwhile CMC area – 2300 Kms 110 Villages – 2000 Kms Total – 4300 Kms3) Creation of Additional Treatment capacity to treat wastewater produced in the new areas
On going projectsEnvironmental Action Plan – A Replacement and Rehabilitation of existingsewers Total length – 33 Kms Cost – Rs. 47 Crores under NRCP Work is completed
On going projectsEnvironmental Action Plan – B Replacement and Rehabilitation of existing sewers Total length – 70 Kms Taken up under 8 packages Cost – Rs. 176 Crores under JnNURM & JICA Project period 2010-2013
On going projectsZero Flow in Hebbal drainage zone Length – 19 Kms Taken up under 3 packages Cost – Rs. 35 Crores under BWSSB funds & Mega city funds Project period 2010-2013
On going projects Providing UGD Facilities to 8 ULBs in BBMP area• Estimated Cost : Rs. 1098.15 Crore• Amount put to bid : Rs. 966.21 Crore• Awarded Cost : Rs. 1191.79 Crore• Funding : JnNURM - World Bank• Project Period : 4 Years• Length of pipeline to be laid : 2300 Kms• Number of packages : 24
On going projects - progress Sl ULB’s Total Pipe Progress Percentage CompletionNo. laying Qty achieved in Date to be Kms achieved in Kms1 Yelahanka CMC 60.28 57.82 95.92% Feb-132 Byatarayanapura CMC 468.81 269.46 57.47% Feb-143 Mahadevapura CMC 357.11 155.81 43.63% Sep-154 Krishnarajapuram CMC 314.85 246.91 78.42% Feb-145 Bommanahalli CMC 466.91 260.84 55.86% Feb-146 Rajarajeshwarinagar CMC 117.22 78.37 66.85% Feb-147 Kengeri TMC 57.62 14.1 24.47% Sep-148 Dasarahalli CMC 470.92 374.61 79.54% Feb-14 TOTAL 2313.72 1457.91 63.01% Sep-15
Future projects Construction of new treatment plants 11 Numbers under JICA assistance 339 MLD Capacity with nutrient removal treatment process 300 MLD plant at V Valley at a cost of Rs. 396 Crore Environmental Action Plan – C Cost – Rs. 360 Crores Length – 109 Kms Water supply and Sanitation to 110 Villages Awaiting clearance from Central Government
Treatment plants proposed under CWSS Stage IV Phase IIName Capacity in MLD Process (Including BNR)Raja Canal 40 Extended Aeration (EA)Horamavu Agara 20 Sequential Batch Reactor (SBR)Nagasandra 20 SBRChikkabanavara 5 SBRKadugodi 6 SBRKachohalli 3 Membrane Bio – ReactorKengeri 60 Activated Sludge Process (ASP)K & C Valley 60 ASPBellandur Amanikere 90 ASPDoddabele 20 SBRYellemallappa Chetty Kere 15 SBRTotal 339
Benefits after the completion of UGD works under KMRPErstwhile ULB Name of the Lake No. of lakesYelahanka Attur, Puttenahalli, Yelahanka, 6 Allalasandra, Jakkur, ShivanahalliBytarayanpura Chikkabanavara, Singapura, 15 Abbegeri, Vidrayanapura, Doddabommasandra, Tindlu, Hebbal, Nagavara, Jakkur, Rachenahalli, Amruthahalli, Hennur, Byrathikhane, Kalkere, Rampura
Benefits after the completion of UGD works under KMRP Erstwhile Name of the Lake No. of ULB lakesMahadeva Munekollal, Sadaramangala, 18pura & K R Bhattrahalli, Vengeankere,Purum Ramamurthy Nagar, Basavapura, Yellemallappa Chetty, Kaggadasapura, Vibhuthipura, Varthur, Mahadevapura, Ganghadhar, Doddakundenahalli, Kundenahalli, Rajupallya, Benniganahalli, Sigehalli, Siddapura
Benefits after the completion of UGD works under KMRP Erstwhile Name of the Lake No. of ULB lakesBommana Jaraganahalli, Chunchanaghatta, 16halli Puttenahalli, Kothunur, Arekere, Hulimavu, Madivala, Agaram, Varthur, Begur, Chikkabegur, Singasandra, Kadagi Singasandra, Somasundra palya, Garvibhavpalya, HosapalyaR R Nagar Mallathahalli, Hosakere, Kengeri, 5& Kengeri Dubasapalya, Halgevadrahalli
Benefits after the completion of UGD works under KMRP Erstwhile Name of the Lake No. of ULB lakesDasarahalli Dasarahalli, Doddabidrakallu, 10 Herohalli, Laggere, Shivapura, Pillappakatte, Bagalkunte, Mallasandra, Chikkabanavara, Nelegadaranahalli Total 70
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