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Jakkur lake and Rainbow Drive stories
- 1. WATER FOR CITIES : PEOPLE SHOW THE WAY
- 2. JAKKUR LAKE : WASTE WATER TREATMENT PLANT
- 3. 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
- 4. Jakkur – 18.9 sq km Catchment. 50 Ha water spread
- 7. STP’s need to be linked to reuse
- 8. Salient Features Design Capacity – 10 MLD Present Average Inflow – 8.5 MLD Wastewater generation – Yelahanka, Jakkur Process Adopted – UASB followed by Extended Aeration Wastewater discharged in to – Wetland of Jakkur Lake
- 9. 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
- 10. 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
- 11. UASB Reactor
- 12. Treatment Plant and Jakkur Lake
- 13. Treated Wastewater entering the wet Land System of Jakkur Lake
- 14. Nature as further treatment
- 15. Lake ecosystem
- 16. Fisheries
- 23. RAINBOW DRIVE : HOW SHOULD WE MANAGE OUR WATER?
- 24. 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)
- 26. Entrance: Prone to Flash Floods during Rain
- 27. WATER SUPPLY - SOURCE Borewells : Long story of many borewells . BUT No individual borewells only community borewells
- 28. WATER SOURCE AND SUPPLY - DISTRIBUTION Source : Borewells Two Centralised overhead tanks with Piped connection to Each household. Infrastructure Owned, Managed and Operated by Plot owners association
- 29. 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
- 30. SUMMARY OF KEY PROBLEMS in 2008 •Increasing water insecurity – borewells drying up. •Community as a whole not aware of the problems – wasteful consumption •Water Tankers not reliable. •Flash flooding at entrance during heavy rains •STP output water stagnating at entrance drains
- 31. 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
- 32. 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!
- 33. 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)
- 34. This means good SWM
- 35. 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
- 36. 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)
- 37. 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…..
- 38. 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
- 40. Re-investment in Waste water reuse
- 41. EXCESS WASTE WATER SOLD TO A FARMER
- 42. Thank you Biome Environmental Trust www.biome-solutions.com Biometrust.blogspot.in avinash@biome-solutions.com (9341324692) Shubha@biome-solutions.com rainwaterclub@gmail.com