✅ It was a great pleasure for us to host a workshop about compact biological nutrient removal with our guests from Germany. We are thankful for the contributions of Prof. Dr.-Ing. Matthias Barjenbruch from the Department of Urban Water Management of the Technical University Berlin and Peter Wulf from the Emscher Wassertechnik GmbH, a subsidiary of Germany‘s largest utility. More stringent effluent requirements, insufficient volumes for stormwater management, upcoming phosphor