Question

What is the primary combustible gas component in biogas, and what is its approximate percentage composition?

Options

• Carbon Dioxide (\[\text{CO}_2\]), 30–40%

• Hydrogen (\[\text{H}_2\]), 50–70%

• Methane (\[\text{CH}_4\]), 50–70%

• Hydrogen Sulphide (\[\text{H}_2\text{S}\]), 30–40%

Answer 1

Biogas is predominantly composed of methane (\[\text{CH}_4\]) at approximately 50–70%, which is highly inflammable and acts as the primary fuel component. Carbon dioxide constitutes about 30–40% and is non-combustible.