The biomethanation is a natural process that produces methane by bacterial action. Bacteria transform organic waste in an anaerobic atmosphere (no air, no oxygen) by the combined action of micro-organisms.
If the right conditions are met, biogas is produced, mainly consisting of methane (60% CH4, 40% CO2) which, in this case, is a non-fossil fuel.
The gas is then transformed via a cogeneration motor in electricity and heat. In parallel to this supply of energy, digestate is also produced for use in agriculture as high value fertilizer.