What is biogas

Biogas is a renewable fuel and a part of the natural cycle. The main component in biogas is methane (65 %) followed by carbon dioxide (35 %). Depending on which substrates that are used the biogas can also contain small amounts of hydrogen sulfide (H₂S) and ammonia (NH₃). When combusting methane, carbon dioxide and water is formed. Even though biogas contains more carbon dioxide than natural gas, combustion of biogas does not lead to any net addtion of carbon dioxide to the atmosphere since the formed carbon dioxide is a part of the natural carbon cycle.

Methane is a chemical compound consisting of four hydrogen atoms and one carbon atom. It is also a powerfull greenhouse gas and by utilising it for energy production or as vehicle fuel its environmetal impact can be reduced. Methane has a carbon dioxide equivalent of 21 (seen from a lifecycle of one hundred years) which means it is a 21 times more powerfull greenhouse gas than carbon dioxide.