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Giessen Wastewater Plant's Modernization to Boost Energy Efficiency

Giessen's wastewater plant is upgrading its aeration systems. The modernization will save energy and reduce costs, boosting the plant's efficiency.

In this image there is a big river beside that there are so many buildings and plants.
In this image there is a big river beside that there are so many buildings and plants.

Giessen Wastewater Plant's Modernization to Boost Energy Efficiency

The Giessen wastewater treatment plant is undergoing a significant modernization project for its aeration systems. This initiative aims to save resources in the long term and ensure high-quality wastewater treatment. The last two aeration basins are scheduled for modernization in 2026 and 2027.

The plant currently has eight aeration basins, each with a volume of 4 million liters. One basin can be taken out of operation each year for modernization work. The last two basins are set to be modernized in 2026 and 2027.

The modernization involves adapting the aeration systems to the high-efficiency compressed air supply of the new combined heat and power (CHP) plant and compressor station, commissioned in May 2023. This has already resulted in substantial savings, with 1,885,000 kilowatt-hours of electricity saved annually since 2023. This is equivalent to the electricity used by 1,450 inhabitants each year. The work on the current basin is expected to be completed by the end of October 2025, with over 800 aerator membranes installed per basin.

The modernization of aeration systems at the Giessen wastewater treatment plant is expected to reduce energy consumption and operating costs. The plant has already increased its share of self-generated energy from around 70 to 94 percent. The successful completion of the modernization project will further enhance the plant's energy efficiency and contribute to long-term resource savings.

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