Madonna del Carmine Wastewater Treatment Plant, Arnara, Lazio, Italy

Madonna del Carmine is an advanced wastewater treatment plant located in Arnara, a town in the province of Frosinone, Lazio, Italy. The plant serves a population of about 1,000 people, reflecting its role in managing domestic wastewater for this small community. Its designed capacity of 1,000 m³/day aligns with the scale of the population served. 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. This level of treatment typically includes nutrient removal and disinfection, ensuring high-quality effluent. As an Italian facility, it operates under national regulations that transpose EU directives, with oversight from regional environmental authorities. The treated effluent is discharged into local watercourses that eventually drain into the Tyrrhenian Sea via the Liri-Garigliano river system. The plant's advanced treatment helps protect the water quality of these rivers and the downstream coastal environment, supporting aquatic life and reducing nutrient loads that could cause eutrophication in the sea.

The plant discharges into the Liri River basin, which flows into the Garigliano River and then into the Tyrrhenian Sea. This coastal area supports diverse marine life and is important for local fisheries. Advanced treatment reduces nutrient pollution, protecting the riverine and marine ecosystems from eutrophication and maintaining water quality for recreational use.