Apart from comprehensive planning, turnkey construction and the commissioning of new power stations, the technical and biological process optimisation of existing biogas plants is a speciality of the company. In terms of the comprehensive process optimisation of biogas plants in Germany, Cowatec belongs to the market leaders. Some 300 operators already use this service across Germany, which the company offers irrespective of plant type and manufacturer. The vast complexity of the influential factors upon the biogas process means that professional specialist consulting is truly worthwhile for the operator. In this connection, Cowatec markets supplementary process additives such as the enzyme preparation MethaPlus, which is added to the biomass in the fermenter and which increases the methane yield with its biochemical process.