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Tuesday, June 28, 2016

Bio Gas plant from Kitchen Waste and other bio degradable solid waste







Bio Gas plant from Kitchen Waste and other bio degradable solid waste

Proven on wide range of wastes and feedstocks including
  • Livestock and agricultural wastes
  • Biomass
  • Sewage and industrial sludges
  • MSW and catering wastes
  • Food industry wastes
  • Vegetable market waste
  • Restaurant Waste
  • Farm House/Cattle manure waste
  • Slaughter House/Tannery waste
  • Presumed waste
Suitable locations for installation of plant
Hotel premises, army/big establishment canteens (private/ government), residential schools/colleges, housing colonies, religious places / temple trusts, hospitals, hotels, sewage treatment plants, villages, etc.






The Principle:

Add bio degradable Solid waste to a  mixer to process the waste before putting it into predigestor tank. The waste is converted in slurry by mixing with water  in this mixture.
Use of thermophilic microbes for faster degradation of the waste. The growth of thermophiles in the predigestor tank is assured by mixing the waste with hot water and maintaining the temperature in the range of 55-60oC. The hot water supply is from a solar heater. Even one-hour sunlight is sufficient per day to meet the needs of hot water.
After the predigestor tank the slurry enters the main tank where it undergoes mainly anaerobic degra-dation by a consortium of archae-bacteria belonging to Methanococcus group. These bacteria are naturally present in the alimentary canal of ruminant animals (cattle). They produce mainly methane from the cellulosic materials in the slurry.
The undigested lignocellulosic and hemicellulosic materials then are passed on in the settling tank. After about a month high quality manure can be dug out from the settling tanks. There is no odour to the manure at all. The organic contents are high and this can improve the quality of humus in soil, which in turn is responsible for the fertility.
As the gas is generated in the main tank, the dome is slowly lifted up. This gas is a mixture of methane (70-75%), carbondioxide (10-15%) and water vapours (5-10%). It is taken through GI pipeline to the lamp posts. Drains for condensed water vapour are provided on line. This gas burns with a blue flame and can be used for cooking as well.
The gas generated in this plant is used for gas lights fitted around the plant. The potential use of this gas would be for a canteen. The manure generated is high quality and can be used in fields.


This manure can be supplied to farmers at the rate of 4-5 Rs. per Kg. Alternatively municipal gardens and local gardens can be assured of regular manure from this biogas plant.




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