NEET BIOLOGY

Detailed explanation-1: -Biogas is generated during anaerobic digestion when microorganisms break down (eat) organic materials in the absence of air (or oxygen). Biogas is mostly methane (CH4) and carbon dioxide (CO2), with very small amounts of water vapor and other gases.

Detailed explanation-2: -Methane generation is accomplished by anaerobic digestion (biological oxidation in the absence of oxygen) of organic substances such as livestock waste and plant refuse. The gas produced in an on-farm digester is only about 65 percent methane, the rest being carbon dioxide and trace organic gases.

Detailed explanation-3: -A methane digester system, commonly referred to as an AD (anaerobic digester), is a device that promotes the decomposition of manure or ‘digestion’ of the organics in manure to simple organics and gaseous biogas products.

Detailed explanation-4: -The digestor is usually a large, sealed container for the organic matter eg manure from livestock or poultry, green waste from agriculture, sewage or food waste. This is digested by bacteria in the absence of oxygen to produce a gas containing methane and carbon dioxide.

Detailed explanation-5: -The anaerobic digestion process produces gas composed of methane (CH4) and carbon dioxide (CO2), known as biogas. These gases are produced from organic wastes such as livestock manure, food processing waste, etc.