Bio Gas 

Biogas is a mixture of colourless and odourless gases. Biogas can be produced through fermentation from any degradable material (Substrate) with the help of different types of tiny microbes.  It can be produced in a concealed chamber/ digester in the absence of atmospheric oxygen. Biogas is a mixture of different gases, major portion in biogas being methane (CH₄) and carbon dioxide (CO₂). It also contains traces of other gases like hydrogen (H₂), Moisture (H2O) , hydrogen sulphide (H₂S)etc. Improved digesters used for anaerobic digestion can produce biogas with 65%–75% methane content. Biogas contains water vapor also. The average quantity of methane and carbon dioxide in cow dung based biogas digesters are in 60:40 ratio.

The biogas can be used for different thermal applications

like cooking, lighting, operating engines, generation of electricity and for making auto fuel.  The main and simple use of biogas generated from a domestic digester is for cooking purpose in houses . Biogas can be purified and upgraded in accordance with the standards of natural gas. The upgraded / Compressed Bio Gas can be used for running vehicles and other applications including different industrial needs

 All easily/fast  degradable  materials  including  cooked / raw food wastes, fruits and vegetable wastes, fish and meat wastes, human excreta, excreta of all domestic and wild animals and birds, organic waste from food processing industries and waste water containing bio  waste materials  can also be used to produce biogas.