A) Storing them in underground storage tanks
B) Using them for producing biogas
C) Vermiculture
D) Using them directly as bio-fertilizers
Correct Answer: B
Solution :
[b] Biogas is a by-product of the decomposition of organic matter by anaerobic bacteria. Biogas is typically composed of 60% methane and 40%\[C{{O}_{2}}\]. It is similar to natural gas which is composed of 99% methane. Biogas is a clean and renewable energy that may be substituted to natural gas to cook, to produce vapour, hot water or to generate electricity. Any organic waste has the ability to produce biogas: human excreta, manure, animal slurry, fruit and vegetable waste, slaughterhouse waste, meat packing waste, dairy factory waste, brewery and distillery waste, etc. Fibre rich wastes like wood, leaves, etc. make poor feed stocks for digesters as they are difficult to digest.
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