Abstract
Biomethane is biogas upgraded to natural gas quality, potentially contributing to decarbonation in the energy and transport sectors. Upgrading of biogas produced from anaerobic digestion of organic waste through separation of CO2 is the typical route for biomethane generation. Recently, conversion of CO2 in biogas to biomethane is attracting attention as one of the possible CO2 recycling technologies. Bio-methanation has been investigated as a method of biological synthesis of biomethane, and recognized as a technology in synergy with material cycles and waste management. This work describes the state of the art and challenges in the investigation of biomethanation technology.
