7. Which are the potential sources of biogas? State any four benefits of biogas.
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Biogas is a reliable fuel, which is produced out of renewable resources, other industrial side products or even waste.
Compared to other renewable energy sources like wind or solar energy biogas can be produced regardless of weather or daytime factors. The biological process of a biogas plant proceeds uninterrupted; 24 hours a day, 7 days a week.
Since it is a fuel source it can be stored for future use.
Carbon Neutral source of energy - While combustion of biogas, like natural gas, produces carbon dioxide (CO2) , a greenhouse gas, the carbon in biogas comes from plant matter that fixed this carbon from atmospheric CO2. Thus, biogas production is carbon-neutral and does not add to greenhouse gas emissions.
Upgraded Bio- CNG has low CO2 emissions, 20% lesser than other conventional (may not be relevant as I have mentioned carbon neutral).
Can be produced from a variety of organic feed stock.
Biogas as such has a moderate energy content but Upgraded and liquefied Bio-Methane has very high energy content.
Existing technology is highly efficient and can reliable.
The anaerobic digestion process which produces Biogas produces also a NPK rich fertilizer which can be used in farms.
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Answer:Potential sources of biogas are: Shrubs, farm wastes, animal, human waste, etc.
Four benefits of biogas are:
(i) Its calorific value is high.
(ii) It burns without smoke, causing no pollution.
(iii) It is the cheapest gaseous fuel.
(iv) Its plants provide twin benefits to the farmer in the form of energy and improved quality of manure.
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