28.12.2021
Biogas-Renewable natural gas U.S. Energy Information Administration EIA
While most of ENGIE’s methanization units are focused on producing biomethane for injection into the natural gas grid, a few units use biogas directly, particularly for cogeneration. The risk of ammonia emissions into the air or water pollution from digestate is closely monitored. This process generates a gas mixture containing 50-70% methane (CH4), water vapor, carbon dioxide (CO2), and other components (NH3, N2, H2S). This process of anaerobic digestion, called methanization, occurs naturally in wetlands but, in the energy sector, is artificially induced in a digester. It traps heat in the atmosphere much more efficiently than carbon dioxide, with a