Question

32. Which of the following gases are produced in a biogas plant?
i) Nitrogen
ii) Methane
iii Carbon dioxide
Options:

• A. a) i only
  
• B. b) i and iii only
  
• C. c) ii and iii only
  
• D. d) All of the above

Answer 1

The correct option is D d) All of the above

D)

Explanation:

Biogas is the type of gas that is produced in an anaerobic digester. Biogas is mostly made of methane and carbon dioxide plus small amounts of some other gases. Biogas generally contains 55%-75% methane and 44%-24% carbon dioxide, with the other gases making up 1% or less of the mixture. Since biogas is made from organic material, it is sometimes also called "renewable natural gas."

Typical composition of biogas:

Methane : 50-80 %

Carbon dioxide : 25-50 %

Nitrogen : 0-10 %

Hydrogen : 0-1 %

Hydrogen sulphide : 0-3 %

Oxygen : 0-2 %