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

Scale of service

City  level

Area of installation

1950 m2


Faecal sludge


Supernatant from S-T tanks is taken to aerated lagoons for further treatment

Year of Installation


Capital investment (INR)

1.76 crore

No. of Users/people affected


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

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


Screen and discharging point for trucks and tankers

Settling-thickening tanks of co-treatment unit

Inlet channel of the co-treatment unit