At the Siófok wastewater treatment plant, 1 reinforced concrete digestion tank with an diameter of 18 meters and 1 with a diameter of 21 meters was built. At the top of the digesters there is an integrated gas storage with a volume of 720 and 1350 m3 , respectively. The daily biogas production is planned to be 3075 Nm3/day, which will be utilized in 1-1 pieces of 150 and 250 kW CHP units installed in a sound-absorbing container. In front of the gas engines, a gas treatment unit (BIOGINWA) ensures the appropriate quality parameters.