Answer: (c) The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash
The main product of biogas is methane. It burns with less smoke and did not produce residual ash.
Biogas refers to a mixture of gases produced by the anaerobic decomposition of organic matter such as agricultural waste, municipal waste, plant residue, food waste etc. Biogas consists of methane, carbon dioxide along with a small amount of hydrogen sulphide, and moisture.
Steps involved in the production of biogas
There are three major steps involved in biogas production
- Hydrolysis: Large organic molecules such as proteins, carbohydrates and lipids are allowed to break down into simpler units with the help of certain enzymes.
- Fermentation:Here in this step the fermentation of organic products takes place and yield many products like organic acids, alcohols, amino acids, CO2 whixh can be used in the next level
- Methane formation: Methane gas is produced
- The residue will be left after the formation of biogas.