Giessen's Wastewater Plant Modernization to Boost Energy Efficiency
The wastewater treatment plant in Giessen is undergoing a significant modernization project to enhance energy efficiency. The goal is to operate the plant more sustainably while maintaining high-quality wastewater treatment. The project, set to be completed by the end of 2026, involves renewing the aeration systems in all eight aeration tanks.
The modernization includes installing more than 800 aerator membranes per basin. This will adapt the aeration systems to the high-efficiency compressed air supply of the new CHP plant and compressor station, commissioned in May 2023. This upgrade is expected to reduce energy consumption and operating costs significantly. Since 2023, the modernization has already saved 1,885,000 kilowatt hours of electricity per year, enough to power 1,450 households annually.
The plant has increased its share of self-generated energy from around 70 to 94 percent following the commissioning of the new CHP plant and compressor station. The modernization will further boost energy efficiency, providing more precise control and better reaction to changing loads in the wastewater, thereby enhancing operational safety.
The modernization of the Giessen wastewater treatment plant is proceeding with the first basin expected to be completed by the end of October 2025. The last two basins are scheduled for modernization in 2026 and 2027. Upon completion, the plant will operate more efficiently and sustainably, ensuring high-quality wastewater treatment with significantly reduced energy consumption and operating costs.
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