Biogas is a gas composed mainly of methane and carbon dioxide in varying proportions, depending on the biodegradation of the organic matter in the absence of oxygen. It is a natural by-product of anaerobic digestion by microorganisms present in material derived from organic waste. organic waste..
Anaerobic digestion (AD) processes can occur in digesters (in biogas plants), wastewater treatment plants (WWTP) or landfills.
Types of material that can be digested include vegetable waste, manure, urban waste, rejects from the agri-food industry, aerobic sludge, etc. In brief, any organic waste or by-product can be harnessed.