What is biogas


Biogas is a gaseous mix made up of:

  • Methane (CH4) – 50/60%
  • Carbon Dioxide (CO2) – 35/40%
  • Other gases - 1%
    • Nitrogen (N2)
    • Hydrogen Sulphide (H2S)
    • Hydrogen (H2)
    • Water vapour (H2O)

The process of anaerobic digestion is the main activity for the production of biogas.

Biogas is a renewable energy source, which is generated through a biochemical process using anaerobic bacteria (bacteria which live without oxygen).

The process can be conducted in Mesophilic (35°C) or in Thermophilic (55°C) temperature conditions; the thermophilic process provides higher yields in biogas and completely destroys pathogenic micro-organisms (salmonella and coliforms).




  • Reliable: Unlike other renewable energy sources (e.g., solar and wind) biogas is produced continuously, so it is always available throughout the year, in any weather situation.
  • Zero emissionsthe amount of CO2 emitted from biogas corresponds to the CO2 previously used by plants, so it is not released additional carbon dioxide.
  • Energy/Heat: thanks to the biogas energy is produced and / or heat, so there is no need for large power plants and reactors.
  • Not only heat and power: in a biogas plant as well as electricity and heat, an excellent natural fertilizer called digestate is produced, used as fertilizer on the fields.