1.2 What is biogas?

Video: https://www.youtube.com/watch?v=3OxWROH3q58

Biogas is a mixture of gases produced through the anaerobic digestion of organic matter. The gas consists mainly of methane, carbon dioxide, and small amounts of other gases, such as hydrogen sulphide and ammonia, as shown in the following table.

MethaneCH455 – 77%
Carbon DioxideCO235 – 45%
Water (vapour)H2O2% (20°C) – 7% (40°C)
Hydrogen SulphideH2S20 -20,000 ppm (2%)
NitrogenN2< 2%
OxygenO2< 2%
HydrogenH2< 1%
AmmoniaNH3< 0.05%
Composition of Biogas (Vögeli Y., 2014)

Methane is a component of biogas. It can serve as a renewable energy source for various purposes, such as cooking, lighting, heating, cooling, electricity generation, and vehicle fuel. It is a sustainable alternative to fossil fuels and can help reduce greenhouse gas emissions.