Biogas refers to the gas formed by mixture of different gases produced by the breakdown of organic matter in the absence of oxygen. Biogas can be produced from raw materials such as municipal waste agricultural waste, manure, plant material, sewage, green waste or food waste.
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Bio-gas renewable energy practices are getting fairly popular because of its beneficial nature. When comes to cooking, heating water and domestic purpose these have arguably proved to be the better alternative than fossil fuels. Comparison between bio-gas and bio-mass suggests that bio-gas is much advantageous to people of rural areas than bio-mass.
Today, there are more than millions of bio-gas plants that are available in developing countries like India, China, Nepal and Bangladesh. Such bio-gases are produced in small-scale in order to meet the requirement of small community or individual house-hold. The construction of such bio-gas is relatively very cheap and utilization of human excreta, household wastes and cattle manure can be done for gas generation. The anaerobic fermentation of human excreta, waste products and cattle manure is a cheap way of getting energy at the same time handling the waste products as well.
When organic material is digested in an anaerobic environment only then bio-gas is produced. One of the most commonly used biogas producer is home-based fixed dome models which are used by small house-hold mostly for cooking purpose and at times for lighting purpose as well. House-hold bio-gas commonly and mostly uses cattle manure, house-hold wastes and human waste.
Health is the basic factor of human life and both firewood and bio-fuel has effects upon the health because of smoke production but in oppose to that bio-fuel drastically improves the internal environment of house-hold. Replacing firewood with biogas would also have positive effect on deforestation improving the environment.