VAZZOLA_VISNA__VIA_MONTEGRAPPA Wastewater Treatment Plant, Visnà, Veneto, Italy

VAZZOLA_VISNA__VIA_MONTEGRAPPA is an advanced wastewater treatment plant located in Visnà, a frazione of Vazzola in the Veneto region of Italy. The plant serves a population equivalent of 3,550 and is situated in the province of Treviso, within the Po River basin. As a medium-sized facility, it plays a key role in managing municipal wastewater for this part of northeastern Italy. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 4,000 m³/day and an actual discharge volume of 702.77 m³/day, it operates well below its capacity, indicating room for future growth. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations between 2,000 and 10,000 population equivalent are required to have secondary treatment, but this facility exceeds that standard with advanced treatment. The treated effluent is discharged into local watercourses that ultimately drain into the Adriatic Sea via the Piave River or other tributaries of the Venice Lagoon. The plant's advanced treatment helps protect the sensitive coastal and lagoon ecosystems of the northern Adriatic, which are important for biodiversity and tourism.

The plant discharges into the drainage network of the Veneto plain, which flows into the Piave River and eventually the Adriatic Sea. The receiving waters support diverse aquatic life and are part of a region known for its agricultural and ecological significance. Advanced treatment reduces nutrient loading, helping to prevent eutrophication in the downstream coastal environment.