In mid-2016, we were asked to create the operation manual for wastewater treatment plant Zeulenroda in cooperation with Wasserbehandlungs- und Abwasserbehandlungswerke Zeulenroda, and now we are looking forward to doing the same for wastewater treatment plants Auma and Triebes. The operation manuals will contain the routine tasks as well as directions for action in extraordinary operating situations and the necessary rules for occupational safety.