Wastewater treatment under control

Energy savings thanks to optimal aeration in the aeration basin

The challenge of increasingly stringent specifications for cleaning wastewater requires continuous optimization and investment. In the past, switching the blowers for aeration on and off in Velen's wastewater treatment plant was controlled by a redox break point. This method worked well over many years. However, with the renovation of the blowers in autumn of 2020, the town saw an opportunity to save energy and to improve nitrogen elimination with a process-oriented aeration control system.

Liquiline Control solution is an automation platform for wastewater treatment processes. At the Velen wastewater treatment plant, it is designed for intermittent aeration control to eliminate nitrogen in two independent zones. Switching the aeration on and off for nitrification and denitrification is controlled by the upper and lower ammonium limit values. For additional process reliability, the system works with minimum and maximum runtimes and pause times in the blower.

The customer challenge

Our solution

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▖Quick and flexible integration of the control system into the existing control system

▖Simple operation by remote access