What does the given figure show ? what is this mixture of cowdung and water called ? which gas is present in biogas in large percentage? what for the residue left out in the biogas plant used ?
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the figure shows a biogas plant. The mixture of cow dung and water is called slury. Methane(CH4) is present in large percentage in biogas. The residue left is used as a manure in fields
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The mixture of cowdung and water is called slurry.
Methane is present in a very large proportion in Biogas as it combusts easily and provides good amount of energy. It has a good calorific value which is a good indicator of efficiency.
The residue left after the production of biogas is used as fertilizer by poor farmers .The residue is a cheap and high quality manure which helps farmers to minimise the costs of farming and increases their profitability. It also is safe and natural and has no side effects unlike chemical fertilizers.
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