“…The methane is the main component of natural gas and can be used as a fuel or as a feedstock in the chemical industry, depending on the quality of the processed gas. Biogas can be considered as a replacement for fossil gas fuels used in transport and power production, in order to handle environmental concerns [2][3][4]. It can be produced by the anaerobic digestion (AD) of organic matter contained in food processing wastes, lignocellulosic biomass, and animal manures, which contain carbohydrates, fats and proteins.…”