Biogas Production: Anaerobic Conditions
Biogas is a mixture of gases, primarily methane ($CH_4$) and carbon dioxide ($CO_2$), produced from the breakdown of organic matter (biomass).
The decomposition process required for biogas formation is called anaerobic digestion.
- Anaerobic means "without air".
- This process occurs when microorganisms break down the biomass in an environment lacking oxygen.
The presence of oxygen ($O_2$) would lead to aerobic decomposition, which produces different byproducts and does not efficiently generate biogas.
Therefore, the necessary condition for biogas production from biomass decomposition is the absence of oxygen.
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Important Questions from Sources of Energy
It is possible to produce algae based biofuels, but what is/are the likely limitation(s) of developing countries in promoting this industry?
1. Production of algae based biofuels is possible in seas only and not on continents.
2. Setting up and engineering the algae based biofuel production requires high level of expertise/technology until the construction is completed.
3. Economically viable production necessitates the setting up of large scale facilities which may raise ecological and social concerns.
Select the correct answer using the code given below:
With reference to two non-conventional energy sources called ‘coalbed methane’ and ‘shale gas’, consider the following ‘statements:
(1) Coalbed methane is the pure methane gas extracted from coal seams, while shale gas is a mixture of propane and butane only that can be extracted from fine-grained sedimentary rocks.
(2) In India abundant coalbed methane sources exist, but so far no shale gas sources have been found.
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Which of the following is the cleanest source of energy?
