Question

Study the given diagram of a biogas plant and choose the correct option.

• A. A - Pit for spent slurry, B - Charge pit for cattle dung and water, C - Digester, D - Gas holder, E - Biogas outlet
• B. A - Pit for spent slurry, B - Gas holder , C - Digester, D - Charge pit for cattle dung and water, E - Biogas outlet
• C. A - Charge pit for cattle dung and water, B - Pit for spent slurry, C - Gas holder, D - Digester, E - Biogas outlet
• D. A - Charge pit for cattle dung and water, B - Pit for spent slurry, C - Biogas outlet, D - Digester, E - Gas holder

Answer 1

The correct option is C A - Charge pit for cattle dung and water, B - Pit for spent slurry, C - Gas holder, D - Digester, E - Biogas outlet

Biogas is a combustible gas which predominantly consists of methane and carbon dioxide. It is widely used as an eco-friendly and pollution free fuel for cooking and lighting. Biogas is produced due to the anaerobic breakdown of organic wastes by methanogenic bacteria.

The given image depicts a biogas plant which is used for biogas production. These are mostly situated in rural areas. A biogas plant consists of a 10-15 feet deep concrete tank known as a digester (D).
It has a charge pit (A) for feeding the slurry of cow dung and water or other organic wastes into the digester where microbes act on the slurry to produce the biogas. A floating gas holder (C) is present over the digester which collects the gas produced within the digester.
The gas holder is connected to an outlet (E) which is turn connects to a pipe that supplies biogas to nearby households. There is a pit (B) for collecting the spent slurry which can be used as manure in agricultural fields.