The action of micro-organisms upon organic matter under anaerobic conditions produces biogas which is typically a mixture of methane and carbon dioxide as well as a many trace gases and vapors. This action is harnessed within a number of anaerobic bioprocesses such as Anaerobic Digestion (AD) and Landfill for the stabilization of polluting organic matter contained with a range of solid wastes and wastewaters. Within the anaerobic conversion of organic material over 90% of energy available in the organic pollutant is retained within the biogas as methane.