Impianto C da Piano Trappeto - Secondary Wastewater Treatment Plant in Trappeto, Sicily

Impianto C da Piano Trappeto is a municipal wastewater treatment plant located in Trappeto, a town in the province of Palermo, Sicily, Italy. The plant serves a population of approximately 2,700 residents and operates with secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. As a coastal facility within 10 km of the Tyrrhenian Sea, the plant's discharge is subject to Italian regulations implementing the EU directive, which may require additional nutrient removal in sensitive areas. The plant's designed capacity of 2,700 m³/day matches the population served, indicating a balanced design for the local community. The treated effluent is discharged into the local water system, which ultimately flows into the Tyrrhenian Sea, part of the Mediterranean Sea. The coastal environment supports diverse marine life and is important for regional tourism and fisheries. Proper treatment helps protect water quality and marine ecosystems in this sensitive coastal zone.

The plant discharges into the Tyrrhenian Sea, a basin of the Mediterranean Sea, via local streams or direct outfall. The coastal waters near Trappeto support seagrass meadows and fish nurseries, making nutrient and pathogen control critical. Secondary treatment reduces organic load and suspended solids, but without tertiary nutrient removal, the discharge may contribute to eutrophication risks in the oligotrophic Mediterranean.