Restoration of Urban Blue Acres

1. WATER FOR CITIES :
PEOPLE SHOW THE WAY

2. RAINBOW DRIVE : HOW SHOULD WE
MANAGE OUR WATER?

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. Entrance:
Prone to Flash
Floods during
Rain

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. 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. 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. 2007-2008 “Water reform”
0
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50
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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. 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. This means good SWM

11. Understanding costs : Tariff revisions
2005 - 2015
0
20
40
60
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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. 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)

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Total Monthly water consumption
Per capita consumption
2008 until now…..

14. 0
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Aug-2014
Sep-2014
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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. Re-investment in Waste water reuse

16. How should utility pipes now
enter this community?
Should it drown their work to
irrelevance?

17. JAKKUR LAKE : WASTE WATER
TREATMENT PLANT

18. Jakkur – 18.9 sq km
Catchment. 50 Ha water
spread

22. STP’s need to be linked to reuse

23. 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

24. 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

25. UASB Reactor

26. Treatment Plant and Jakkur Lake

27. Treated Wastewater entering the wet
Land System of Jakkur Lake

28. Nature as further treatment

29. Lake ecosystem

31. Fisheries

34. Plumbers, well diggers, Masons,
Fishermen, gardeners,………

35. Resources
www.bengaluru.urbanwaters.in

36. 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

38. 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

39. 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