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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.

Cost details, saving and payback period from a biogas plant:
The cost details and the savings envisaged from the plant are given in the following table. The life of the plant could be 20-30 years and payback period is 4-5 years.
Capacity (Tons / Day)Installation Cost (Rs In Lacks)Monthly Operation and Maintenance Charges (Rs)Methane Generation M3Manure production (tons /day)Area Required M2PowerManpowerFresh Water (KL /day)Hot water (Ltr / day of 50-60 C0)Cooking Fuel (Equivalent to LPG Cyl / day)
18-108,000/-100-1200.13005hp(2hr)222002-3
210-1212,000/-200-2400.25005hp(3hr)334004-5
420-2222,000/-400-4800.37005hp(3hr)454008-10
528-3030,000/-500-6000.580010hp (4hr)5760012-14 (25Kw)
1065-7050,000/-1000-12002.5120015hp (4hr)1015100022-25 (50Kw)
* This is an approximate cost for biogas generation plant and may increase by 10%–20%, depending on location, site-specific parameters, cost of materials, labour cost, etc., in different states/cities. Cost of additional infrastructure like office space, toilets, security, Godown, Shades and power generation will be extra, if required.
Rs – rupees; m3 – cubic meters; m2 – square meters; h – hour; kL – kilolitre; LPG – liquefied petroleum gas; kW – kilowatt; cyl – cylinder
0.5 T (500KG) Biogas Project Cost
Civil Construction of Biogas Plant
Gas Holding MS Steel Dome
Steel Fabricated Covers on Manure Pits,
Mixer Tank
Air Compressor
Water Heater
Water Pump and Slurry Pump
Water and Gas Pipelines on Plant area
Electric Fittings & Miscellaneous
Stirrer for mixer

Total Project cost Rs.5 lacs
Success of this biogas plant depends a great deal on proper segregation of the kitchen waste. The materials that can pose problems to the efficient running of plant are coconut shells and coir, egg shells, onion peels, bones and plastic pieces. Steel utensils like dishes, spoons etc. are likely to appear in the waste bags from canteens. While bones, shells and utensils can spoil the mixer physically, onion peels, coir and plastic can have detrimental effects on microbial consortium in the predigester and main digestion tanks which could be disastrous for the plant.
YOU NEED AN EXPERT TO DESIGN A PROPER ECONOMICAL EFFICIENT SYSTEM.WE ARE WORKING SINCE 1994.
WE USE AN INNOCULUM WHICH INCREASES THE EFFICIENCY OF THE SYSTEM.

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