IDL_VICARELLO Wastewater Treatment Plant, Collesalvetti, Tuscany

IDL_VICARELLO is a municipal wastewater treatment plant located in Vicarello, a frazione of Collesalvetti in the province of Livorno, Tuscany, Italy. The plant serves a population of 3,205 and has a designed capacity of 4,000 m³/day, with an average daily discharge volume of 634.48 m³/day. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent (PE) between 2,000 and 10,000. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring compliance with EU effluent quality standards. The treated effluent is discharged into the local drainage network, which flows into the Arno River basin or directly to the Ligurian Sea via smaller coastal streams. The region's water bodies support diverse aquatic life and are important for both ecological balance and recreational use. The plant plays a key role in protecting downstream water quality in this densely populated and agriculturally active area of Tuscany.

The plant discharges into the local watershed, which ultimately drains to the Ligurian Sea via the Arno River basin or coastal streams. The receiving waters support a variety of aquatic species and are part of a region known for its ecological sensitivity, including coastal lagoons and wetlands that provide critical habitat for migratory birds and marine life. The plant's secondary treatment helps reduce nutrient loading and organic pollution, mitigating eutrophication risks in downstream coastal ecosystems.