Donneloye Wastewater Treatment Plant: Advanced Treatment in Vaud, Switzerland

The Donneloye wastewater treatment plant is located in the municipality of Donneloye, within the Jura-Nord vaudois district of the canton of Vaud, Switzerland. This small-scale facility serves a population of 230 residents, reflecting the rural character of the area. The plant is situated near Route de la Croix Blanche and operates as part of the region's municipal wastewater infrastructure. The plant provides advanced treatment, which goes beyond the secondary treatment standard required by Swiss regulations for smaller agglomerations. Switzerland's Water Protection Act (GSchG) mandates strict effluent quality standards, and advanced treatment typically includes nutrient removal to protect sensitive water bodies. The plant's designed capacity of 538.00 m³/day indicates it has room to accommodate future growth, while the current discharge volume of 104.40 m³/day suggests efficient operation. The treated effluent from Donneloye is discharged into local waterways that ultimately drain into the Broye River, a tributary of the Aare River, which flows into the Rhine and eventually the North Sea. The plant plays a key role in protecting the ecological health of these waters, particularly in a region known for its agricultural landscapes and biodiversity. Advanced treatment helps reduce nutrient loads, safeguarding downstream aquatic habitats.

The Donneloye plant discharges into local streams that feed the Broye River, a tributary of the Aare River within the Rhine basin. The Rhine ultimately drains into the North Sea. The surrounding watershed supports diverse aquatic life and is an important corridor for migratory fish. Advanced treatment at this plant helps minimize nutrient enrichment and protects the ecological balance of these water bodies.