biodegradable organic materials via anaerobic digestion. It can be used as a fuel or as
starting material for the production of chemicals, hydrogen and/or synthesis gas etc. The
main constituents of biogas are methane (CH 4) and carbon dioxide (CO 2), with various
quantities of contaminants, such as ammonia (NH 3), water vapour (H 2 O), hydrogen sulfide
(H 2 S), methyl siloxanes, nitrogen (N 2), oxygen (O 2), halogenated volatile organic …