Geography
What is biogas? How is biogas produced?
Non-Conventional Energy Sources
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Answer
Biogas is composed of methane, carbon dioxide, hydrogen and hydrogen sulphide.
Biogas is produced by anaerobic degradation of animal and plant wastes in the presence of water. Anaerobic degradation means breaking down of organic matter by bacteria in the absence of oxygen. The fermentation of the waste products is carried out by bacteria, which produces hydrocarbon gas, predominantly methane and alcohol. The residue left behind in the tank is rich in nutrients and can be used as manure.
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Related Questions
Write a short note on Compressed Biogas.
Observe Figure 2 and answer the following question:
(a) Identify the type of energy generated and state the advantages of using it.
(b) Which two areas can be well suited for its generation?
(c) Briefly describe the method of generating electricity by this method.
(d) In India this source of energy has been divided into provinces. Name three such provinces.
Which non-conventional source of energy would you prefer to use for running street lights, water pumps for irrigation and heating your house? Give reasons to support your answer.
More people in the rural areas are now opting for LPG cylinders for domestic cooking. Do you think LPG should be replaced by biogas? Give reasons to support your answer.