Question

Composition of biogas produced during sewage treatment is

• A. methane, oxygen, hydrogen sulphide.
• B. hydrogen sulphide, methane, oxygen.
• C. hydrogen sulphide, nitrogen, methane.
• D. methane, hydrogen sulphide, carbondioxide.

Hint:

Biogas = CH$_4$ + CO$_2$ + H$_2$S — no oxygen or nitrogen involved in anaerobic generation.

Answer 1

The Correct Option is D

Biogas primarily consists of methane (CH$_4$), along with carbon dioxide (CO$_2$) and traces of hydrogen sulphide (H$_2$S). Oxygen and nitrogen are not typical components of biogas generated via anaerobic digestion in sewage treatment.