The process of anaerobic digestion is a sustainable process of recycling large amounts of food and animal waste, which is backed by local, national and government regulated bodies. It is recognised by organisations that we, as a regulated business are associated with, such as DEFRA.
Anaerobic digestion is a complex biological process involving the breakdown of organic matter in the absence of air in large, sealed and insulated vessels with controlled heating and mixing.
Food waste enters a sealed building where it is processed into a liquid porridge, and then pumped into the anaerobic digestion plant. It is here that bacteria feed on the food waste and produce biogas. Biogas is captured and used as a fuel in CHP engines or sent through a gas filter and sent directly to the gas grid.
The digestate or biofertiliser produced undergoes pasteurisation to ensure that any pathogens are destroyed and is stored in large lagoons ready to be applied twice a year on farmland. The use of this high nutrient biofertiliser replaces the use of fossil-fuel derived fertilisers and ensures a complete loop of carbon and energy capture.