Question

The diagram below represents a typical biogas plant. Select the correct option for A, B and C respectively.

• A. A - Sludge, B - Dung + Water, $C-C{H}_4+C{O}_2$
• B. A - Dung + Water, B - Sludge, $C-C{H}_4+C{O}_2$
• C. A - Sludge, $B-C{H}_4$ and $C{O}_2$ ,
  C - Dung + Water
• D. $A-C{H}_4+C{O}_2$ , B - Dung + Water, C - Sludge

Answer 1

The correct option is C A - Sludge, $B-C{H}_4$ and $C{O}_2$ ,

C - Dung + Water

Biogas is a mixture of gases (containing predominantly methane) produced by the microbial activity and which may be used as fuel. The biogas plant consists of a concrete tank (10-15 feet deep) in which bio-wastes are collected and a slurry of dung is fed. The biogas plant has an outlet, which is connected to a pipe to supply biogas to nearby houses. The spent slurry is removed through another outlet and may be used as fertiliser.