CDA_BOCCA_ARENA Wastewater Treatment Plant, Mazara del Vallo, Sicily

CDA_BOCCA_ARENA is a wastewater treatment plant located in Mazara del Vallo, a coastal town in the province of Trapani, Sicily, Italy. The plant serves the local population and is situated near the Mediterranean Sea, reflecting the region's reliance on marine ecosystems. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this scale. With a designed capacity of 69,000 m³/day, it is sized to handle significant wastewater flows, likely serving a population equivalent well above 10,000. The plant's coastal location means that treated effluent is discharged into the Mediterranean, necessitating compliance with stringent standards to protect marine water quality. The receiving water body is the Mediterranean Sea, specifically the Strait of Sicily, which supports diverse marine life and is an important fishing ground. The plant's operations are critical for preventing nutrient pollution and safeguarding coastal ecosystems, including seagrass meadows and migratory fish species. Its proximity to the coast underscores the need for effective treatment to minimize environmental impact.

The plant discharges into the Mediterranean Sea via the Strait of Sicily, a key marine corridor connecting the western and eastern Mediterranean basins. This area supports rich biodiversity, including Posidonia oceanica seagrass meadows and important fisheries. The coastal location requires advanced treatment to prevent eutrophication and protect sensitive marine habitats from nutrient loading.