Methanation is a natural biological process that recycles organic material into biogas. This process is also known as anaerobic digestion, because the material is processed in a hermetically sealed environment with no oxygen.
The waste is analyzed, prepared, processed, and then placed inside a “digester” or “methanizer”. It is then mixed together and heated. As they ferment, the bacteria turn the easily degradable organic material into biogas. Once purified, biogas takes the name of biomethane. That biomethane can then be odorized, checked by the gas network operator, and injected into the distribution network. Its characteristics and usages are exactly identical to those of natural gas, and it is impossible to tell it apart from the natural gas it is mixed with.
- Biogas is a combustible gas resulting from a biological reaction called methanation.
- Biomethane, meanwhile, is the biogas that results from advanced purification.