AIX SUD D Wastewater Treatment Plant, Aachen, Nordrhein-Westfalen

AIX SUD D is a secondary wastewater treatment plant located in Aachen, in the state of Nordrhein-Westfalen, Germany. The plant serves a small population of about 1,428 residents, reflecting its role in managing local domestic wastewater within the urban and suburban areas of Aachen. As a secondary treatment facility, AIX SUD D provides biological treatment to reduce organic matter and suspended solids. The plant has a designed capacity of 2,300 cubic meters per day, and its current discharge volume is 361.39 cubic meters per day, indicating operational headroom. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, which AIX SUD D meets. The treated effluent from AIX SUD D is discharged into the local watershed, which ultimately drains into the Rur River basin and then into the Meuse River. This waterway supports diverse aquatic life and is an important ecological corridor in the region. The plant's operation helps protect downstream water quality in the Meuse basin.

AIX SUD D discharges into the local drainage network that feeds into the Rur River, a tributary of the Meuse River. The Meuse flows through Belgium and the Netherlands before reaching the North Sea. The watershed supports diverse aquatic habitats and is used for recreation and drinking water supply downstream. The plant's secondary treatment reduces nutrient and organic loads, helping to maintain ecological balance in the receiving waters.