Question

What role does hydrogen sulphide (H₂S) play in biogas, and how should it be managed?

Options

• It is a combustible gas that increases energy output

• It is a corrosive trace component that should be removed before use

• It is non-combustible and reduces calorific value

• It is an inert gas with no specific role

Answer 1

Hydrogen sulphide (H₂S) is present in biogas as a trace component. Although present in small quantities, H₂S is highly corrosive and can damage equipment and pipelines if not removed before biogas is used. Therefore, H₂S must be removed or treated before the biogas is utilized for cooking, lighting, or other applications.