The gas engineuses the energy content of the gas to generate electricity.
Biogas may need cleaning before it is fed to the engine. As a rule of thumb, one-third of the biogas is turned into electricity and two-thirds is turned into heat. The generation efficiency of gas engines run on biogas is around 38-40 per cent. When heat production is included, the overall system efficiency is around 80–85 per cent.
Biogas Systems supplies gas engines of various outputs from a range of manufacturers as complete, prefabricated stations.