Bissen Wastewater Treatment Plant, Bissen, Luxembourg

The Bissen wastewater treatment plant is located in Bissen, Canton Mersch, Luxembourg. It serves a population of 1,819 and operates with secondary treatment, a standard for smaller agglomerations under EU regulations. The plant's designed capacity is 2,000 m³/day, with an average discharge volume of 651.38 m³/day. As a secondary treatment facility, Bissen meets the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary biological treatment for agglomerations between 2,000 and 10,000 population equivalent. This ensures effective removal of organic matter and suspended solids before discharge. The treated effluent is released into the local watershed, which ultimately drains into the Alzette River and then the Moselle River, a major tributary of the Rhine. The Rhine basin supports diverse aquatic ecosystems and is an important migratory corridor for fish species. The plant's inland location reduces direct marine impact.

The Bissen plant discharges into the local water system that flows into the Alzette River, a tributary of the Moselle River. The Moselle joins the Rhine, which drains into the North Sea. This watershed supports diverse aquatic life and is an important ecological corridor in the region. The plant's secondary treatment helps protect downstream water quality.