DP01813902_S_CRISTINA_E_BISSONE Wastewater Treatment Plant, Santa Cristina e Bissone, Italy

DP01813902_S_CRISTINA_E_BISSONE is an advanced wastewater treatment plant located in Santa Cristina e Bissone, a municipality in the province of Pavia, Lombardy, Italy. The plant serves a population equivalent of approximately 4,010 and has a designed capacity of 6,000 cubic meters per day, with a reported discharge volume of 793.84 m³/day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size (under 10,000 PE) are generally required to provide secondary treatment, but Italy has designated sensitive areas where more stringent treatment is mandated. The plant's advanced treatment likely reflects such requirements or local environmental objectives. The treated effluent is discharged into local watercourses that ultimately drain into the Po River basin, one of Italy's most important hydrological systems. The Po River flows eastward into the Adriatic Sea, supporting extensive agricultural, industrial, and ecological systems. The plant's advanced treatment helps protect downstream water quality in this densely populated and agriculturally intensive region.

The plant discharges into the Po River basin, which drains into the Adriatic Sea. The Po River is the longest river in Italy and supports a rich ecosystem, including migratory fish species and diverse aquatic habitats. The surrounding Lombardy region is characterized by intensive agriculture and urban development, making nutrient removal from wastewater critical to prevent eutrophication in the Adriatic Sea. The advanced treatment at this plant helps reduce nitrogen and phosphorus loads, contributing to the ecological health of the downstream environment.