Anaerobic digestion of different feedstocks: Impact on energetic and environmental balances of biogas process

In comparison to the fossil reference system, the electricity production using biogas saves GHG emissions from 0.188 to 1.193 kg CO2eq per kWhe. Electricity supply from biogas can also contribute to a considerable reduction of the use of fossil energy carriers (from − 3.97 to 10.08 MJfossil per kWhe). The electricity production from biogas has a big potential for energy savings and reduction of GHG emissions. Efficient utilization of the cogenerated heat can substantially improve the GHG balance of electricity production from biogas.