stps as a source of water for lakes
TRANSCRIPT
STPs and its role as source of water to LAKES
Jakkur Lake
● 10 MLD design● 8.45 MLD inflow
from Yelahanka and Jakkur
● UASB, EAR● WETLAND● STP open for
viewing
Treatment Plant and Jakkur Lake
Treated Wastewater entering the wet Land System of Jakkur Lake
Nature as further treatment
Lake ecosystem
Fisheries
Sludge as Compost
Groundwater
Community – Jala Poshan
Herohalli, Magadi Road
● 25 acres● 1.5 MLD STP● Sewage mining● SBT● Issues with
electricity and dyes in inlets
Herohalli, Magadi Road
SEWAGE MINING
Herohalli, Magadi Road
Puttenahalli
● 13 acres● 5-8 MLD from
private STP● Provision for
WETLAND● New Idea/Hope
Puttenahalli
Lalbagh Lake
● 30 acres● 1.5MLD Tertiary
treatment● Water is first
used in the park, excess into the lake
Lalbagh Lake
Kelagina Ambalipura
● 7 acre lake● Surrounded by 4
apartments● Treated water
from STP used for drip irrigation
Kelagina Ambalipura
Phytorid
Other Lakes/STPs to be seen
● Doraikere● Dasarahalli● Malathahalli
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
KEY Learnings from Rejuvenated lakes and STPs
● Diversion of sewage: Not necessarily a solution● Despite STP an Alternate sewage diversion channel is also required
● Water Inflows to a lake through an STP followed by a well sized WETLAND seems to enable the sustainability of the lake.
● Redirection of treated waste water from private and public STPs is worth exploring
Design Parameters
The plant is designed for the following influent characteristics of wastewater.pH 7.06 – 8.1Total Solids 782-1352 mg/lTSS 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