WATER FOR CITIES : PEOPLE SHOW THE WAY

JAKKUR LAKE : WASTE WATER TREATMENT PLANT

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

Jakkur – 18.9 sq km Catchment. 50 Ha water spread

STP’s need to be linked to reuse

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

Design Parameters

The plant is designed for the following influent characteristics of wastewater.pH 7.06 – 8.1Total Solids 782-1352 mg/lTSS320-672 mg/lBOD5, 20°C 290-369 mg/lCOD465-973 mg/lChlorides (as Cl) 74-151 mg/lSulphates (as SO4) 11-41 mg/l

Design Parameters

The plant is designed for the following characteristics of treated water.BOD5 ≤ 20 mg/lSuspended solids ≤ 30 mg/lpH5.5 – 9Oil & Grease ≤ 10 mg/lResidual Chlorine ≤ 1 mg/lColour & Odour See NoteIron(as Fe) 3 mg/LNitrate Nitrogen 10 mg/LNote: all efforts are to be made to remove colour and odour as far as practicable

UASB Reactor

Treatment Plant and Jakkur Lake

Treated Wastewater entering the wet Land System of Jakkur Lake

Nature as further treatment

Lake ecosystem

Fisheries

RAINBOW DRIVE : HOW SHOULD WE MANAGE OUR WATER?

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 connectionDependent on Ground water ( owned bore wells)

Entrance:Prone to FlashFloods during

Rain

WATER SUPPLY - SOURCE

Borewells : Long story of many borewells .

BUT

No individual borewells only community borewells

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

WASTE WATER & SANITATION : What Was

Two STPs given by the builderSTPs functioning questionable

What to do with “treated” waste water?

Infrastructure Owned, Managed and Operated by

Plot owners association

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

Every household connection

METERED !!!!

Upto 2005 : Builder promised free water2005 : Consumption meters installed by

POA – separate water tariff (4Rs/KL)2008 : Water reform begins in Earnest

2007-2008 “Water reform”

0 5 10 15 20 25 30 40 60 800

10

20

30

40

50

60

70

2008 Tariff Change

20082005

Pric

e pe

r KL

Banning of private borewellsUnderstand consumption

Understand production costsCommunication & 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!

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)

This means good SWM

Understanding costs : Tariff revisions2005 - 2015

0 10 20 30 40 50 60 70 80 900

20

40

60

80

100

120

140

Change in tariff over a decade

2012200820142005

Water Slabs in KL

Pric

e pe

r KL

Understanding costs : Tariff revisions2005 - 2015

0 10 20 30 40 50 60 70 80 900

20

40

60

80

100

120

140

Change in tariff over a decade

2012200820142005

Water Slabs in KL

Pric

e pe

r KL

Tanker Costs : Rs 150/- to Rs 500 /- ( Rs 37.5 / KL to Rs 125 / KL)

0

1000

2000

3000

4000

5000

6000

7000

8000

0

50

100

150

200

250

300

350

Total Monthly water consump-tionPer capita consumption

2008 until now…..

0

1000

2000

3000

4000

5000

6000

7000

8000

0

50

100

150

200

250

300

350

Total Monthly water consump-tionPer capita consumption

Demand management – reducing demandPer capita drops from 250+ LPCD to approx 150 LPCDTotal demand drops despite increase in occupancy

Feb 08

Apr 0

8Jun

08Au

g 08

Oct 08

Dec 08

Feb 09

Mar 10

Mar 12

Dec-20

12

Feb-20

13

April-

2013

June-2

013

Aug-2

013

Oct-20

13

Dec-20

13

Feb-20

14

April-

2014

June-2

014

Aug-2

014

Oct-20

14

Dec-20

140

20406080

100120140160180200220240260280300320340360

Total no of occupied plotsPlots complying with RWH

Re-investment in Waste water reuse

EXCESS WASTE WATER SOLD TO A FARMER

Thank youBiome Environmental Trustwww.biome-solutions.comBiometrust.blogspot.in

avinash@biome-solutions.com (9341324692)Shubha@biome-solutions.comrainwaterclub@gmail.com