In the fermenter which is heated approximately at 38-40 °C, the substrate is decomposed by the micro organisms under exclusion of light and oxygen. The final product of this fermentation process is biogas with methane as the main ingredient. But aggressive hydrogen sulphide is also contained in the biogas. Once the substrate has been fermented, it is transported to the fermentation residues end storage tank and can be retrieved from there for further utilisation. The residues can be utilised as high quality fertiliser.

The biogas generated is stored in the roof of the tank and from there it is burned in the combined heat and power plant (CHP) to generate electricity and heat. The electric power is fed directly into the power grid. The heat generated can be utilised to heat building or to dry wood or harvest products.