EDUCATION (CBSE/UGC NET)

Detailed explanation-1: -This refers to biogas fermentation at a temperature of 30°C–35°C. This fermentation process has a faster digestion rate [generally above 1.0 m3/(m3 liquid d)] and higher gas production rate and is more widely applied in practice.

Detailed explanation-2: -Biogas production is carried out at different temperatures: temperature range 45– 60 °C is referred to as ‘thermophilic, ’ whereas that carried out at temperature range 20–45 °C is known as ‘mesophilic’ and at low temperatures (<20 °C) is referred to as ‘psychrophilic’ digestion (Safley and Westerman 1992).

Detailed explanation-3: -In the biogas reactor, microbial action begins and the biomass enters a gradual process of fermentation. In practice this means that microbes feed on the organic matter, such as proteins, carbohydrates and lipids, and their digestion turns these into methane and carbon dioxide.

Detailed explanation-4: -Anaerobic digestion is strongly affected by temperature [8, 9]. Optimum temperature of mesophilic digester for biogas production is 35°C.