BIOGAS PLANTS

Anaerobic digestion (AD) is a natural process which converts organic matter such as household food and garden waste, farm slurry, waste from food processing plants and supermarkets, into energy. The main products resulting from anaerobic digestion are biogas (a mixture of methane and carbon dioxide), which is very similar to natural gas, and digestate, a low level fertilizer. The biogas can be used to generate electricity, gas or heat, or compressed for use as a biofuel. The fertilizer is rich in nitrates and phosphates. The water industry has been using anaerobic digestion to convert effluent into energy and fertilizer for many years.