BIOGAS PLANT AND ITS BENEFITS
Presented by:Mihir Shah (A-26) Mithun Pardesi(A-28) Muzammil Deshmukh (A-29) Neha Naik (A-30) Pawan Panjwani (A-34)
• Biogas is an important renewable energy resource for rural areas in India. • It is produced by anaerobic digestion of biological wastes.
• It is an environment friendly, clean, cheap and versatile fuel. • Biogas generally comprise of 55-65 % methane, 35-45 % carbon dioxide, 0.5-1.0 % hydrogen sulfide and traces of water vapour. • Biogas like Liquefied Petroleum Gas (LPG) cannot be liquefied under normal temperature and pressure.
BIOGAS TECHNOLOGY STATUS
• India has been pioneering country in developing simple and easy to operate biogas plants. • The government of India has been running National Biogas and Manure Management Program (NBMMP) for the welfare of the weaker section of the society. • 100% Biogas engines are in operation in the country.
• Other urban waste projects include a 1 MW project based on cattle dung at Haebowal, Ludhiana; a 0.50 MW project for generation of power from biogas at sewage treatment plant at Surat, Gujarat; and a 150 kW pant for vegetable market and slaughter house waste and Vijaywada. • Another 300 kW project based on vegetable market waste in under commissioning at Chennai. Besides, about 25 waste-to-energy projects with an aggregate capacity of about 30 MW from a variety of industrial wastes also been setup in the country.
BIOGAS- FERTILIZER PLANTS: MOST IMPORTENT TOOL TO HANDLE METHANE • Methane (Green house gas) released from three Landfills of Delhi during 2008: (Indian Express 29.01.2010) • Effect of methane is higher than from CO2 by: 74,000 tonnes
• Percentage of methane in harmful green house gas:
• Annual CO2 Emission Reduction from 1.5 lakh biogas plants:
BIOGAS PRODUCTION POTENTIAL FROM DIFFERENT WASTES
THE BENEFITS OF BIOGAS
PRODUCTION OF ENERGY
• The calorific value of biogas is about 6 kWh/m3 - this corresponds to about half a litre of diesel oil. The net calorific value depends on the efficiency of the burners or appliances. • Biogas use, replacing conventional fuels like kerosene or firewood, allows for the conservation of environment. • Biogas is able to substitute almost the complete consumption of firewood in rural households. • The biogas generated from small and medium sized units is used for cooking and lighting purposes. Large units can be used to power engines and generators for mechanical work
• The output from the polythene bio gas digester (digested manure) is actually a high quality organic fertilizer. • This fertilizer is very important, especially in a country like INDIA • Fertilizer which comes from a bio-gas plant contains three times more nitrogen than the best compost made through open air digestion. • The bio-gas plant does not make extra nitrogen; it does not create nitrogen, it merely preserves the nitrogen that is already there. • The bio gas plant is the perfect fertilizer-making machine and it has been tested all over the world. There is no better way to digest or compost manure and other organic material than in a bio-gas plant. • Bio-fertilizers also secrete growth promoting substances like hormones, vitamins, amino acids and anti-fungal chemicals, as well as improve seed germination and root growth. Bio-fertilizers, thereby also aid in the better establishment of plants.
HEALTH BENEFITS, THE IMPROVEMENT OF HYGIENIC CONDITIONS
The following are the principal organisms killed in biogas plants: • • • • • Typhoid Paratyphoid, Cholera and dysentery bacteria (in 1 or 2 weeks), Hookworm and bilharzia (in 3 weeks). Tapeworm and roundworm die completely when the fermented slurry is dried in the sun.
Dung cakes are no longer stored in the homes.
REDUCTION OF WORKLOAD
Biogas plants also improve health conditions in the homes:
• Since biogas burns clean, homes do...