Co-treatment at Aerated Lagoons based STP at Mangala Ghat, Puri

Screen and discharging point for trucks and tankers

 

Scale of service	City level	Area of installation	1950 m2
Inlet	Faecal sludge	Outlet	Supernatant from S-T tanks is taken to aerated lagoons for further treatment
Year of Installation	2016	Capital investment (INR)	1.76 crore
No. of Users/people affected	44,187	Designed capacity	25 KLD
Operation and Maintenance	16.9 lakhs/year	Construction and O&M responsibility	Orrisa Water Supply and Sewerage Board

Location of the technology:

Mangala ghat is a place in Puri on the banks of Dhaudia river. The geographical coordinates i.e. latitude and longitude of Mangala ghat is 19.8139° N, 85.8068° E respectively.

Need for technology

Under AMRUT, faecal sludge management is in infant stage in Odissa.To fast track faecal sludge management along with sewage OWSSB has installed co-treatment unit at existing 15 MLD STP situated at Mangala ghat.

System description

• The plant has elevated unloading platform for trucks and tankers
• Faecal sludge is emptied into a sludge receiving box of 1 m x 1 m
• FS goes into an inlet channel which is 3m long
• Screen bar is placed in the channel at an angle of 45°
• From screens, influent goes to Setting-Thickening tanks of L x B x D = 7 m x 2.5 m x 2.55 m
• Thickened sludge is taken out of S-T tanks after a period of 10 days and the supernatant goes into existing aerated lagoons of the STP
• Thickened sludge is taken to existing sludge drying beds where they are kept till they are dried completely under direct sunlight
• The supernatant is then taken to existing aerated lagoons of the existing STP for further treatment

Settling-thickening tanks of co-treatment unit

Inlet channel of the co-treatment unit