STIENTA_VIA_MAFFEI Wastewater Treatment Plant, Stienta, Veneto, Italy

STIENTA_VIA_MAFFEI is an advanced wastewater treatment plant located in the municipality of Stienta, in the Veneto region of northern Italy. The facility serves a small population of around 1,999 residents and has a design capacity of 2,000 cubic meters per day, with a reported discharge volume of 395.73 cubic meters. It is situated in the Po River basin, an agriculturally intensive area that relies on effective wastewater management to protect water quality. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to reduce eutrophication risks in sensitive receiving waters. As a small agglomeration (under 2,000 population equivalent), the plant is subject to Italian national regulations implementing the directive, which mandate appropriate collection and treatment systems. The treated effluent is discharged into local waterways that eventually flow into the Po River, one of Italy's most important rivers, which drains into the Adriatic Sea. The Po River basin supports diverse aquatic life and is a critical resource for agriculture, industry, and drinking water. The plant's advanced treatment helps minimize nutrient loading and protect downstream ecosystems, including the Po Delta wetlands, which are ecologically significant habitats for migratory birds and fish species.

The plant discharges into the Po River basin, which flows eastward through northern Italy and empties into the Adriatic Sea. The Po River supports a rich ecosystem, including fish species such as sturgeon and eel, and its delta is a vital stopover for migratory birds. Advanced treatment at this plant reduces nutrient pollution, helping to prevent algal blooms and hypoxia in the Adriatic, which is a semi-enclosed sea sensitive to eutrophication.