Question

During sewage treatment biogas produced includes

• A. Hydrogen sulphide, Nitrogen, Methane
• B. Methane, Oxygen, Hydrogen sulphide
• C. Methane, Hydrogen sulphide, Carbon dioxide
• D. Hydrogen sulphide, Methane, Sulphur oxide

Answer 1

Answer: (C)

Biogas is made up of methane (50-70%), carbon dioxide (30-40%) and hydrogen sulphide. However traces of nitrogen, hydrogen and oxygen arc also found.