IDL_COLLE_DI_COMPITO Wastewater Treatment Plant, Capannori, Tuscany

IDL_COLLE_DI_COMPITO is an advanced wastewater treatment plant located in Colle di Compito, a frazione of Capannori in the province of Lucca, Tuscany, Italy. The plant serves a population of approximately 1,947 and has a designed capacity of 4,800 m³ per day, with an average discharge volume of 385.44 m³ per day. As an advanced treatment facility, it provides tertiary-level purification beyond secondary biological treatment, typically including nutrient removal (nitrogen and phosphorus) and disinfection. This level of treatment is consistent with Italy's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for discharges into sensitive areas. The plant's capacity utilization is low, indicating ample reserve for future growth or seasonal variations. The plant's treated effluent is discharged into local watercourses that eventually drain into the Arno River basin and then into the Tyrrhenian Sea. The surrounding area is part of the Serchio River plain, an ecologically important region with wetlands and agricultural zones. Advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the sensitive coastal environment of the Tyrrhenian Sea.

The plant discharges into the local drainage network that feeds into the Serchio River, which flows into the Tyrrhenian Sea near Viareggio. This coastal area supports diverse marine life and is important for fisheries and tourism. The advanced treatment ensures that nutrient loads are minimized, reducing the risk of eutrophication in the receiving waters and protecting the ecological balance of the Tyrrhenian coastal zone.