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Restoration of Urban Blue Acres_Biome Water for Cities

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Restoration of Urban Blue Acres

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Restoration of Urban Blue Acres_Biome Water for Cities

  1. 1. WATER FOR CITIES : PEOPLE SHOW THE WAY
  2. 2. RAINBOW DRIVE : HOW SHOULD WE MANAGE OUR WATER?
  3. 3. RAINBOW DRIVE Location Sarjapur Road, Bangalore – Ground water stressed area Size 34 acres, approx 350 plots, 258 occupied Details Currently governed by Plot owners association (Society) since 2002. No BWSSB connection Dependent on Ground water ( owned bore wells)
  4. 4. Entrance: Prone to Flash Floods during Rain
  5. 5. WATER SOURCE AND SUPPLY - DISTRIBUTION Source : Communitised Borewells Two Centralised overhead tanks with Piped connection to Each household. Infrastructure Owned, Managed and Operated by Plot owners association
  6. 6. WASTE WATER & SANITATION : What Was Two STPs given by the builder STPs functioning questionable What to do with “treated” waste water? Infrastructure Owned, Managed and Operated by Plot owners association
  7. 7. Every household connection METERED !!!! Upto 2005 : Builder promised free water 2005 : Consumption meters installed by POA – separate water tariff (4Rs/KL) 2008 : Water reform begins in Earnest
  8. 8. 2007-2008 “Water reform” 0 10 20 30 40 50 60 70 0 5 10 15 20 25 30 40 60 80 PriceperKL 2008 Tariff Change 2008 2005 Banning of private borewells Understand consumption Understand production costs Communication & outreach Invest in sustainability (Rainwater Harvesting) Flooding a big problem. Recharge well projected as a solution for flooding Community recharge wells dug for demonstration Households invested in recharge at Household level get Rs 100/- discount on bill!
  9. 9. RECHARGE WELLS – THREE TYPES Wells in Storm water drains invested in by RWA (Collective Investment) Wells in Storm water drains invested in by House hold (Just outside the house - individual Investment) Wells inside the House (individual Investment)
  10. 10. This means good SWM
  11. 11. Understanding costs : Tariff revisions 2005 - 2015 0 20 40 60 80 100 120 140 0 10 20 30 40 50 60 70 80 90 PriceperKL Water Slabs in KL Change in tariff over a decade 2012 2008 2014 2005
  12. 12. Understanding costs : Tariff revisions 2005 - 2015 0 20 40 60 80 100 120 140 0 10 20 30 40 50 60 70 80 90 PriceperKL Water Slabs in KL Change in tariff over a decade 2012 2008 2014 2005 Tanker Costs : Rs 150/- to Rs 500 /- ( Rs 37.5 / KL to Rs 125 / KL)
  13. 13. 0 50 100 150 200 250 300 350 0 1000 2000 3000 4000 5000 6000 7000 8000 Feb08 Mar08 Apr08 May08 Jun08 July08 Aug08 Sep08 Oct08 Nov08 Dec08 Jan09 Feb09 Mar09 Mar10 Mar11 Mar12 Nov-2012 Dec-2012 Jan-2013 Feb-2013 Mar-2013 April-2013 May-2013 June-2013 July-2013 Aug-2013 Sep-2013 Oct-2013 Nov-2013 Dec-2013 Jan-2014 Feb-2014 Mar-2014 April-2014 May-2014 June-2014 July-2014 Aug-2014 Sep-2014 Oct-2014 Nov-2014 Dec-2014 Jan-2015 Total Monthly water consumption Per capita consumption 2008 until now…..
  14. 14. 0 50 100 150 200 250 300 350 0 1000 2000 3000 4000 5000 6000 7000 8000 Feb08 Mar08 Apr08 May08 Jun08 July08 Aug08 Sep08 Oct08 Nov08 Dec08 Jan09 Feb09 Mar09 Mar10 Mar11 Mar12 Nov-2012 Dec-2012 Jan-2013 Feb-2013 Mar-2013 April-2013 May-2013 June-2013 July-2013 Aug-2013 Sep-2013 Oct-2013 Nov-2013 Dec-2013 Jan-2014 Feb-2014 Mar-2014 April-2014 May-2014 June-2014 July-2014 Aug-2014 Sep-2014 Oct-2014 Nov-2014 Dec-2014 Jan-2015 Total Monthly water consumption Per capita consumption Demand management – reducing demand Per capita drops from 250+ LPCD to approx 150 LPCD Total demand drops despite increase in occupancy
  15. 15. Re-investment in Waste water reuse
  16. 16. How should utility pipes now enter this community? Should it drown their work to irrelevance?
  17. 17. JAKKUR LAKE : WASTE WATER TREATMENT PLANT
  18. 18. Jakkur – 18.9 sq km Catchment. 50 Ha water spread
  19. 19. STP’s need to be linked to reuse
  20. 20. The reuse of treated waste-water • With a constructed wetland further polishing occurs • Wetlands become bio-diversity spots • Eco-system service functions of water fulfilled • Groundwater recharge allowed • Fisheries possible
  21. 21. Salient Features  Design Capacity – 10 MLD (upgrading to 15 MLD)  Present Average Inflow – 10 MLD+  Wastewater generation – Yelahanka, Jakkur  Process Adopted – UASB followed by Extended Aeration  Wastewater discharged in to – Wetland of Jakkur Lake, now competing with a Gas Power station
  22. 22. UASB Reactor
  23. 23. Treatment Plant and Jakkur Lake
  24. 24. Treated Wastewater entering the wet Land System of Jakkur Lake
  25. 25. Nature as further treatment
  26. 26. Lake ecosystem
  27. 27. Fisheries
  28. 28. Plumbers, well diggers, Masons, Fishermen, gardeners,………
  29. 29. Resources www.bengaluru.urbanwaters.in
  30. 30. Thank you Biome Environmental Trust www.bengaluru.urbanwaters.in www.biome-solutions.com Biometrust.blogspot.in avinash@biome-solutions.com (9341324692) Shubha@biome-solutions.com rainwaterclub@gmail.com
  31. 31. Design Parameters The plant is designed for the following influent characteristics of wastewater. pH 7.06 – 8.1 Total Solids 782-1352 mg/l TSS 320-672 mg/l BOD5, 20°C 290-369 mg/l COD 465-973 mg/l Chlorides (as Cl) 74-151 mg/l Sulphates (as SO4) 11-41 mg/l
  32. 32. Design Parameters The plant is designed for the following characteristics of treated water. BOD5 ≤ 20 mg/l Suspended solids ≤ 30 mg/l pH 5.5 – 9 Oil & Grease ≤ 10 mg/l Residual Chlorine ≤ 1 mg/l Colour & Odour See Note Iron(as Fe) 3 mg/L Nitrate Nitrogen 10 mg/L Note: all efforts are to be made to remove colour and odour as far as practicable

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