Giessen Wastewater Plant Modernization Saves Energy, Powers 1,450 Homes
The wastewater treatment plant in Giessen is undergoing a significant modernization project. The goal is to operate more efficiently and sustainably, conserving resources in the long term. Thomas Becker, the head of wastewater treatment and acting managing director, emphasizes the modernization of aeration systems as a key factor for this.
The plant has eight aeration basins, each with a volume of 4 million liters. One basin is taken out of operation each year for modernization work. The new combined heat and power (CHP) plant and compressor station, commissioned in May 2023, has increased the plant's self-generated energy share from around 70 to 94 percent.
The aeration systems are being adapted to the high-efficiency compressed air supply of the new CHP plant/compressor station. This reduces energy consumption and operating costs. Since 2023, the modernization has already resulted in a savings of 1,885,000 kilowatt hours of electricity per year, enough to power 1,450 homes.
The last two basins are scheduled for modernization in 2026 and 2027. The modernization of one basin is expected to be completed by the end of October 2025, with more than 800 aerator membranes installed. This modernization is expected to improve operational safety, reduce energy consumption, and maintain high wastewater treatment quality.
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