Anaerobic digestion

Anaerobic digestion consists on the degradation of organic matter in absence of oxygen and through the action of some specific microorganisms. As a result of this process, the biomass is decomposed resulting in a gaseous product called biogas and a liquid subproduct known as digestate. Biogas is formed mainly by methane (CH4) and carbon dioxide (CO2), therefore it has interest as biofuel. Digestate is formed by inorganic compounds rich in nitrogen, phosphorus and potassium, therefore it can be used as compost for the field or for the production of fertilizers.