# What are the constituents of biogas? Enlist advantages and disadvantages of biogas.

What are the constituents of biogas? Enlist advantages and disadvantages of biogas.

Answer : Biogas consists of 50-70%% methane, 30-40 % CO, and small amount of H,S, H, and N.

1. Biogas is renewable source of energy.

2. Biogas is a storable energy source

3. Raw material is easily available.

4. It is odourless, smokeless, and pollution free.

5. It is useful as an efficient fuel.

6. Residue (sludge) is used as fertilizer.

7. It is non poisonous.

8. The gas can be used not only for cooking but also for lighting purpose , for power generation to run small water pumps and flour mills.

9. Fertilizer is without pathogens and thus improves sanitation.

10. lt proves cheap fuel in rural areas