BELLACHBE LOMM LAN Wastewater Treatment Plant, Bellach, Solothurn, Switzerland

BELLACHBE LOMM LAN is a municipal wastewater treatment plant located in Bellach, a municipality in the canton of Solothurn, Switzerland. The plant serves a population of around 6,300 residents, placing it in the small-to-medium agglomeration category. Its location in the Aare river basin places it within Switzerland's densely populated Mittelland region. Swiss wastewater treatment plants are regulated under the Federal Water Protection Act (GSchG) and the Water Protection Ordinance (GSchV), which mandate secondary treatment with nutrient removal for plants serving over 2,000 people. For a plant of this scale, advanced treatment including phosphorus removal is standard to protect sensitive water bodies. The plant's treatment process and capacity are consistent with these national standards. The treated effluent from the plant is discharged into the local water system, which ultimately drains into the Aare River, a major tributary of the Rhine. The Rhine flows through Germany and the Netherlands before reaching the North Sea. The plant plays a key role in protecting the Aare's water quality, supporting aquatic life and downstream ecosystems.

The plant discharges into the Aare River basin, which flows into the Rhine and eventually the North Sea. The Aare is a vital waterway for the region, supporting diverse fish populations and providing drinking water. The plant's nutrient removal helps prevent eutrophication in downstream lakes and rivers, particularly in the Rhine delta.