Faecal Sludge and Septage Treatment with Thermal Processes at Warrangal
| Scale of service |
15 cu.m. per day |
Area of installation (Sq. Ft.) |
12,500 sqft |
|
Inlet |
Septage |
Outlet |
Biochar*, Treated Water, Thermal Energy |
|
Year of Installation |
2017-18 |
Capital investment (INR) |
1.5 Cr excl. GST |
|
No. of Users |
8 lakhs (approx..) |
Treatment time |
One day. Solids treatment – Typically 12 hours. Liquid treatment – Typically 1 day HRT |
|
C.O.D. |
100 |
B.O.D. |
30 |
Location of the technology:
Google Maps Location - 17.938375, 79.558984. The Plant is located near Ammavaripet village in the outskirts of Warrangal city.
Need for technology
Over 70% of India’s towns and cities have no access to sewers or treatment options to manage their septic tank and pit waste. This waste is desludged and disposed in water bodies, drains and fields. The need for septage treatment is to improve the quality of life of the people in these 3000+ non-sewered towns and cities across India and of the truck operators and workers engaged in the sanitation sector.
System description
The system follows six stages and treats solids and liquids in the septage:
Screening and Storage – A receiving station with screening unit, grit chamber and one day septage storage
Solid-Liquid Separation in the septage – Dewatering unit with polymer dosing, mixing followed by thickening and dewatering
Removal of Pathogens in the Liquid Filtrate – Pasteurization at 85 C
Treatment of the liquid to meet PCB norms – Soil Bio Filter / MBBR with tertiary treatment facility (PSF+ACF+UV)
Moisture removal from the solids – Mechanical Drying
Treatment of solids for pathogen kill and useful output – Pyrolysis
Operation and maintenance:
|
Electricity Consumed ( In units) |
8 to 12 units per hour for a 10-hour operating day |
|
Maintenance of the installation |
Periodic cleaning of the screening unit and grit chamber, Backwash in the pasteurization system and tertiary treatment facility, Cleaning of the heat exchangers, General upkeep, maintenance and tuning. |
|
O&M cost (INR) |
About INR 2.5 lakhs per month in this plant. But typically, INR 1.5 lakhs |
Technology provider perspective:
The Thermal FSTP at Warangal treats the septage generated in the town upto plant capacity to generate treated water, thermal energy and biochar / ash which are within environmentally responsible limits. The plant is modular and scalable while occupying a small land footprint. Biosafety is the critical parameter behind designing the plant. In addition, the system works in a diverse range of weather conditions and has been beneficial for the town of Warangal since November 2017.
Social Aspect
Perspective towards the technology/plant: Positive
Pros |
Cons |
|
Low footprint |
Requires Electricity (Grid / DG) and skilled manpower
|
Picture annexure:
Containerized Thermal FSTP at Warangal
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