Write a note on biogas.

Explanation

Biogas is the mixture of methane (nearly 75%), hydrogen sulphide, carbon dioxide and hydrogen. It is produced by the decomposition of animal wastes (cow dung) and plant wastes in the absence of oxygen. It is also commonly called as 'Gobar gas' since the starting material used is cow dung called as gobar.
Uses of biogas:
(i) It is used as fuel for cooking.
(ii) It is used to run motors and pump sets.
(iii) It is used to generate electricity.
Advantages of biogas :
(i) . It burns without smoke and therefore causes less pollution.
(ii) An excellent way to get rid of organic wastes like bio-waste and sewage material.
(iii) Left over slurry is good manure rich in nitrogen and phosphorus.
(iv) It is safe and convenient to use.
(v) It can reduce the amount of greenhouse gases emitted.