The document discusses nutrient flows and water management in cities. It focuses on wastewater treatment in Bangalore, India. Specifically, it describes the Jakkur Wastewater Treatment Plant, which treats around 9.5 MLD of wastewater generated from Yelahanka and Jakkur. The plant uses a UASB reactor followed by extended aeration and discharges the treated water into the wetlands of Jakkur Lake for further natural treatment before release.

1. Nutrient Flows and water

2. What the city does
The business of wastewater
• Sewage treatment insufficient and not all
households are connected
• Untreated sewage is killing rivers, though
providing nutrients to farmers

5. Vijaypura- falling groundwater tables

6. Waste-water from the city

7. Used productively

8. Growing vegetables too

9. Jakkur Wastewater Treatment
Plant
Bangalore

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

15. STP’s need to be linked to reuse

16. Salient Features
 Design Capacity – 10 MLD
 Present Average Inflow – 9.5 MLD
 Wastewater generation – Yelahanka, Jakkur
 Process Adopted – UASB followed by
Extended Aeration
 Wastewater discharged in to – Wetland of Jakkur Lake

17. Design Parameters
The plant is designed for the following influent
characteristics of wastewater.
pH 7.06 – 8.1
Total Solids 782-1352 mg/l
Total Suspended solids (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

18. 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

19. UASB Reactor

20. Treatment Plant and Jakkur Lake

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

22. Nature as further treatment

23. Lake ecosystem

24. Fisheries