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Short Answer Question Write in brief about the production process. - Biology

Answer in Brief

Short Answer Question

Write in brief about the production process.

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Process of biogas production:

Anaerobic digestion involves three processes:

a. Hydrolysis or solubilization:

1. In the initial stage, the raw material (cattle dung) is mixed with water in equal proportion to make a slurry which is then fed into the digester.

2. Here anaerobic hydrolytic bacteria (e.g. Clostridium, Pseudomonas) hydrolyse carbohydrates into simple sugars, proteins into amino acids, and lipids into fatty acids.

b. Acidogenesis: In this stage, facultatively anaerobic, acidogenic bacteria and obligate anaerobic organisms, convert simple organic material into acids like formic acid, acetic acid, H2, and CO2.

c. Methanogenesis: This is the last stage in which anaerobic Methanogenic bacteria like Methanobacterium, Methanococcus convert acetate, H2, and CO2 into Methane, CO2 and H2O, and other products.

1. \[\ce{\underset{\text{(Acetic acid)}}{12mol CH3COOH} -> \underset{\text{Methane}}{12CH4} + 12CO2}\]

2. \[\ce{\underset{\text(Formic acid)}{4mol H{.}COOH} -> CH4 + 3CO2 + 2H2O}\]

3. \[\ce{CO2 + 4H2 -> CH4 + 2H2O}\]

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Balbharati Biology 12th Standard HSC Maharashtra State Board
Chapter 11 Enhancement of Food Production
Exercise | Q 3.2 | Page 270
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