Anaerobic Digestion Derived Biogas Overview - Brochure

Anaerobic digestion (AD) is a natural process in which micro-organisms, in the absence of oxygen, break down the organic matter in the supplied feedstock such as sewage, farm slurry and food waste, to produce biogas. The resulting gas is usually in excess of 50% methane with the remaining fractions being Carbon dioxide and minor contaminants including Hydrogen Sulphide and Siloxanes. As a by-product of the process a nitrogen rich digestate is produced which may be used as a fertiliser usually supplied in pellet form.