Nutrient Flows and water

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

Vijaypura- falling groundwater tables

Waste-water from the city

Used productively

Growing vegetables too

Jakkur Wastewater Treatment Plant

Bangalore

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 – 9.5 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/lTotal Suspended solids (TSS) 320-672 mg/lBOD5, 20°C 290-369 mg/lCOD 465-973 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/lpH 5.5 – 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