Bangalore Water Supply & Sewerage Board

Reuse and Recycle ! Dr. P.N. Ravindra EE, BWSSB

!1 BWSSB AND ITS FUNCTIONS ➢ Formed under State legislature Act on 10-09-1964 for Water Supply & Sewage disposal. ➢ One of the first Water & Sanitation Utility in ➢ Jurisdiction: Metropolitan Area ➢ Board is an autonomous body under the GoK. ➢Adequate water supply to meet demand, creation of sewerage network & safe disposal of sewage ➢Preparation, implementation of plans & schemes for augmenting water supply & safe disposal of sewage. ➢Levy and collection of water charges on ‘no loss no profit basis’ for sustainability of the system.

!2 BWSSB EXPANDED AREA

Core area 245 Sq. Km 8 ULB 330 Sq. Km 110 Villages 225 Sq. Km Total 800 Sq. Km Byatrayanpura ! K.R. Puram CWSS Stage IV Phase II covers 8 ULBs

Dasarahalli 110 Villages are not covered Core Area

Kengeri Mahadevapura

R.R. Nagar

Bommanahalli

!3 BANGALORE WATER SUPPLY ➢ People were using wells, lakes, kalyanies as water sources prior to 1896. ➢ First piped filter water supply ➢ Started in 1896 from Hesaraghatta lake built across River Arkavathi. ➢ Raw water was pumped to city (CJF) where it was treated and supplied. ➢ Supply was augmented in 1933 ➢ from Chamaraja Sagara Reservoir built across River Arkavathi at T.G.Halli down stream of Hesaraghatta ➢ Treatment carried at TG Halli and pumped to the city ➢ Cauvery Water Supply Scheme started in 1974.

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Hessarghatta Lake Built in 1896 Chamaraja Sagar Lake (TG Halli) Built in 1933 Cauvery river source Water SourcesWATER for Bangalore SOURCES City FOR BANGALORE

TRANSMISSION PIPE LINE INSIDE CITY

Bangalore

5 No’s TRANSMISSION PIPE LINE FROM WTP BWSSB

Water Supply Sources

Projects Year MLD Remarks

Arkavathy (TG Halli) 1933 149 No supply from this source

Cauvery Stage I 1974 135

Cauvery Stage II 1983 135

Cauvery Stage III 1993 270

Cauvery Stage IV, Ph– I 2002 270

Cauvery Stage IV, Ph– II 2012 500 As of now 325 MLD supplied

1200 MLD of water from river Cauvery after treatment is pumped to Bangalore!11 in three stages to an elevation of 1000 feet for a distance of over 100 kms WTP at T.K. Halli Pump House at T.K.Halli TRANSMISSION MAIN FROM T.K.HALLI TO BANGALORE CITY

943 932 935 HEGGANAHALLI GLR 885 839 835 827 TATAGUNI PS 785

J.K. DODDI 735 721 H G L 696 685 HAROHALLI PS 635

585 T.K. HALLI PS 0KM 10 20 30 40 50 60 70 80 87

Schematic Diagram 1000MM ID MS PIPELINE 1600MM ID 48ML 66 MLD TO GKVK & 1950MM ID MS PIPELINE MS PIPELINE SINGAPURA 18KM HEGGANAHALLI 270 MLD 172MLD WTP 24ML 12ML 12ML (5KM) WESTERN ZONE (44KM) (21KM) 98 MLD 1000MM ID MS PIPELINE TO KOD’HALLI & 1200MM ID 36ML 58 MLD T.K. HALLI HAROHALLI TATAGUNI MS PIPELINE HUDI 6 KM EASTERN ZONE KOTNURDINNE Top View of Ground Level Reservoir BWSSB – Water Distribution ! 1. Present Supply of water from Cauvery source - 1150 MLD 2. Present population served - 8.5 Million 3. Area of water supply served - 570 sq. kms 4. Total no. of house service connections - 6,84,764 nos. 5. Total length of water supply pipeline - 8,746 kms 6. Number of Ground Level Reservoirs - 52 ( 771 ML) 7. Number of Over Head Tanks - 36 (33 ML) 8. Total no. of booster pumping stations - 62 nos 9. Number of public taps providing free water - 7,477 nos. 10. Number of water tanker lorries - 38

11. Total no. of slums provided with water supply -362 slums !16 BWSSB –Sewerage System

1. Total length of sewer system - 4,500 Kms 2. Number of manholes - 1,25,000 3. Sanitary house service connections - 7,38,450 4. Number of sewer cleaning combination (Jetting & Sucking machines) for cleaning & maintaining of sewer system - 119 nos 4. Total no. of desilting machines - 6 nos.

5. Daily massive desilting programme is being taken up as a preventive measure for proper upkeep of the sewer system

!17 Planning for the Future…

!18 Projected population water demand up to 2051

Popula Water Present Short fall in Year tion Demand supply demand in Remarks in lakhs in MLD in MLD 1 2 3 4 MLD5 TMC6 7

2011 84.99 1683 960 723 9.33

2021 105.81 2095 1460 635 8.19

2031 142.96 2831 1460 1371 17.69

2041 170.85 3383 1460 1923 24.81

2051 205.61 4071 1460 2611 33.69

Hessarghatta Lake Built in 1896 Hesarghatta Lake Present status Chamaraja Sagar Lake (TG Halli) Built in 1933 CS Lake Present status Cauvery river source Cauvery river source High demand for Drinking Water ▪ To bridge increasing gap between demand and supply BWSSB is thinking, Out of Box Solutions - Rainwater harvesting - Loss reduction - Water conservation - Reuse and Recycle ▪ Reuse is now gaining attention. - Utilising large quantity of treated wastewater that is flowing out of city - Treated wastewater refined through reliable treatment process to be useful for potable reuse - Adopting: Indirect Potable Reuse Recycle & Re-Use of Water

!29 Water Reclamation Plants

Sl. Capacity Location Treatment Facility No. in MLD

1. Vrishabhavathi Valley 180 Secondary – Trickling filters

2. K & C Valley 248 Secondary: Activated sludge process 3. Hebbal Valley 60 Secondary: Activated sludge process 4. Madivala 04 Secondary: UASB + oxidation ponds+ constructed wetlands 5. Kempambudhi 01 Secondary: extended Aeration

6. Yelahanka 10 Activated sludge process + filtration+ chlorination (Tertiary)

31 Water Reclamation Plants

Sl. Location Capacity Treatment Facility No. in MLD 7. Mylasandra 75 Secondary – Extended aeration 8. Nagasandra 20 Secondary -Extended aeration 9. 10 Secondary – UASB +Extended aeration 10. K. R. Puram 20 Secondary – UASB +Extended aeration

11. Kadabeesanahalli 50 Secondary-Extended aeration

12. Rajacanal 40 Secondary- Extended aeration 13. 1.5 Membrane

Extended Aeration + Plate Settlers + 14. Lalbagh 1.5 UV disinfection

Grand Total 721 32 Recycle & Reuse of Water

Tertiary Treated water can be used for ! ✓ Landscape Irrigation ✓ Toilet Flushing ✓ Floor washing ✓ Construction Purposes ✓ Air conditioning ✓ Cooling purposes ! •Presently being supplied to BIA, BEL, Railways, Arvind Mills •Reclaimed water quality meets requirement of non-potable use

TTP at Vrishabhavathi valley YelahankaCLARIFIERS - YELAHANKATTP Why Reuse Water ?

Reduces Pollutants to Rivers and Estuaries Limited New Water Sources Lowers Cost to Users

Relieves Social/ Restores Potable Water Environmental Groundwater Demand Benefits Levels

Improves Potable Water Offers Reliable Quality Water Supply Restores River/ (Drought-Proof) Lake Levels Obstacles to Water Reuse

Cost of Treatment and Distribution

Lack of Public Stakeholder No Regulatory Perception Consensus Guidance in India

Effective Removal of Contaminants

Inexpensive Water Supplies Reuse applications Reuse applications Reuse benefits • Decreases net water demand and adds value to water • Potable substitution – potable water for drinking, reclaimed water for non potable • Reduce manufacturing industries costs by using high quality reclaimed water • Valuable & drought proof alternative water for industry & irrigation • Reduce nutrient removal costs to protect the surface waters through irrigation • Reduces nutrient discharge to the environment and loss of freshwater to the sea • Control the problems of over abstraction of surface & groundwater • Manage the recharge of surface and ground waters to optimise quality, quantity • Integrates with all parts of the anthropogenic water cycle to enable cohesion between all regulators and industries Indirect potable reuse scheme ! • Multiple barrier treatment system provide public health protection (remove all contaminants) ! • Indirect Potable Reuse is viable, cost effective water supply, may become Inevitable ! • Public Support is Needed Public outreach program is being planned for acceptability & consensus of such application of reuse water. (Tie up with SCE for Public Education, Outreach and Engagement Plan for acceptability) Proposed 140 MLD Reuse Scheme

Upgraded T G Halli WTP Existing Transmission line 60 Raw Water Dam Cl2 addition 100 MLD

MLD 135 MLD Kumudavathi River To BWSSB Reservoir Distribution System UF New Transmission Pumping V-Valley line 75 MLD Station 35 MLD T G Halli Wastewater Reservoir Treatment Plant High rate settler/UF to Reverse Osmosis recover backwash Raw Sewage(BNR) (RO) water STP Waste to Lagoon 70 MLD (140 MLD) Reclaimed GAC Backwash Upgraded water UF TTP 7 Kms Tertiary Cl2 addition Backwash / Cl2 addition Treatment (Super reject (for residual Plant chlorination) maintenance) 23 Kms, 1300 mm Pumping diameter MS pipe. 70 Ultrafiltration (UF) 67.5 MLD Station MLD (140 MLD) Plant 70 MLD (140 (135 MLD) MLD) Granular Break Tank/ Break Tank Activated Cascade Aerator After UF PlantCarbon (GAC) Treated water and micro- filters sump strainer at Arkavathy V-valley Plant Tavarekere River Premises Tavarekere Reuse scheme in house • Adopt the policy of “use twice” • Segregate the waste streams • Wastewater from kitchen, toilet can be drained • Wastewater from washing of clothes and bathing for reuse • Water used for cloth washing and bathing can be reused with nominal treatment like nominal filtration • Toilet flushing, car washing, • Cleaning • Gardening Thanks to all the participants

[email protected]

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