Question

Biogas is produced under _____________ conditions by fermentation of biological materials.

• A. aerobic and anaerobic
• B. anaerobic
• C. aerobic
• D. none

Answer 1

The correct option is B

anaerobic

Biogas typically refers to a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen. Biogas can be produced on fermenting raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste etc. By the action of certain anaerobic microbes which on degrading the organic matter in the absence of oxygen produce essential biogas, carbondioxide and hydrogen gases. Hence biogas is produced in anaerobic conditions.