Sinnar FSTP (based on UASB Technology)


Designed: 70 KLD

Area of installation(Sq. ft.)



Faecal Sludge and Septage(such as Excreta + Flush water + Urine + Anal cleansing Water)


Treated water, fertilizer and biogas

Year of Installation


Capital investment (INR)

1.51 Cr

Scale of service

Citywide coverage of 14,100 households within municipal limits.

Treatment time






Location of technology:

The Faecal Sludge Treatment Plant of Sinnar is located at the existing solid waste management site which is 4 km away from the city center. The coordinates of the FSTP facility are 19°51’19.0”N 74°01’35.0”E.

Need for technology

In Sinnar, majority of toilets are connected to septic tanks. The emptying cycle of containment systems is around 5-7 years leading to high levels of BOD in the effluent flowing into open drains. Earlier, Faecal Sludge and Septage (FSS) from the septic tanks were disposed off at the solid waste management site without any treatment. Improper disposal of septic tank effluents and septage posed direct and indirect socio-economic impacts too. Hence, the city aimed to improve their sanitation situation by moving towards becoming ODF++ as envisioned by the Government of Maharashtra which will take care of its faecal sludge and septage along the value chain. This includes schedule emptying of containment systems and installation of Faecal Sludge Treatment plant to manage FSS.

System description

  • The municipal council has awarded a contract to the private contractor (Sumeet Facilities Pvt. Ltd.) for 3 years to empty FSS on a scheduled basis from households. Whereas, septic tanks of community and public toilets are emptied by Sinnar Municipal Council (SMC)

  • The collected FSS is taken to the 70 KLD treatment facility consisting of a storage/stabilization unit, solid-liquid separation unit, solid treatment and liquid treatment unit

  • The process involves anaerobic digestion for sludge in the UASB reactor and for wastewater in the Anaerobic Baffled reactor.

  • Post anaerobic digestion of wastewater, advanced treatment of wastewater is done through Post Sand Filtration (PSF) and Activated Carbon Filter (ACF) unit installed after ABR. The sludge settled from the UASB is put for sun drying on the Sludge Drying Beds.

  • Faecal sludge and septage collected from households and community toilets are transferred through vacuum trucks. It is first emptied into collection tank at the FSTP to homogenize the content

  • The homogenized FSS is then conveyed to clarifier tank for settling process. The settled sludge in the clarifier tank is then pumped to UASB reactor and liquid portion from clarifier goes to Anaerobic Baffled Reactor (ABR) for further treatment

  • UASB reactor produces digested sludge, biogas and liquid effluent

  • The digested sludge from the bottom of the UASB reactor is taken to the sludge drying beds while the liquid from the top of the reactor flows into the ABR unit. Clarified effluent is further treated through ozonisation.

  • Pathogens in settled sludge are killed through the solar drying process in the sludge drying beds.

  • The dried sludge in the form of manure and treated wastewater is used for plantation and horticulture purpose

  • Additionally, biogas in small quantity is also produced for which, SMC has plans for floating a separate tender for the provision of power generator at the site to utilize biogas during the second phase.

Operation and maintenance:

Maintenance of the installation

  • The operations and maintenance for 3 years of the FSTP have been awarded to Panse Consultants, Pune, who have also constructed the FSTP
  • The contractor would be paid a monthly contract fee against submission of documentation of O&M of the treatment facility
  • SMC will be responsible for regular monitoring
  • The cost required for maintaining the treatment facility will be arranged from the own fund sources of SMC

Electricity consumed (In units)


O&M cost (INR)

₹ 8.3 lakhs per year

Technology provider perspective:

Please provide points describing the system

Social aspect

Perspective towards the technology/plant:



  • Scientific treatment of collected faecal sludge and septage
  • Significant reduction in the pollution level of the land, water bodies and rivers
  • Potential for reduction in usage of potable water for non-potable purposes due to re-use. 
  • Potential for reuse of fertilizer for landscaping, forestry and agriculture.
  • Health improvement of the people by prevention of various water-borne diseases such as diarrhoea, dysentery, cholera, jaundice, typhoid, etc. saving a huge amount of money which would have been spent for treatment of these diseases.
  • Clean and green environment overall
  • The FSTP of Sinnar has been designed and constructed carefully considering all the contextual technical, social and financial aspects. However, as the facility has not started functioning fully at present, the challenges have not been identified so far.


Process Flow Diagram of Sinnar FSTP (UASB Technology)


Figure  Clarifier Tank, FSTP, Sinnar

Clarifier Tank, FSTP, Sinnar



Contact details:-

Mr UmeshPanse,
Panse Consultants,
88/1, Pooja Niwas,
Atreya Society,
Kothrud, Pune, 411038,
Tel: 020-25397371 , M.: 9422400860