On March 30, 2023, the day had finally arrived. I was able to visit the wastewater treatment plant in Rüti in the Zurich Oberland region. Thanks to my connection with my employer (Rüti municipality), it was relatively easy to arrange a visit. Prior to my visit, I had prepared some questions and sent them to the wastewater treatment plant team. When I arrived there, the operation of the wastewater treatment plant was explained to me first. I will try to summarize the important steps here. More...