ALVENISIO Wastewater Treatment Plant, Bussi sul Tirino, Italy

ALVENISIO is a wastewater treatment plant located in Bussi sul Tirino, a town in the province of Pescara, Abruzzo, Italy. The plant serves a population of approximately 3,850 people, classifying it as a small agglomeration under Italian and EU regulations. It is situated inland, away from coastal areas, and its operations are part of the regional wastewater infrastructure managed by local authorities. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity is 5,000 m³/day, and the current discharge volume is 762.16 m³/day, indicating operational headroom. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into a receiving water body within the Aterno-Pescara basin, which ultimately flows into the Adriatic Sea. The plant plays a key role in protecting local water quality and the downstream environment, including the Pescara River and the coastal marine ecosystem. Its operation supports the ecological health of the region's freshwater and marine habitats.

The plant discharges into the Aterno-Pescara river basin, which drains into the Adriatic Sea via the Pescara River. This coastal marine environment supports diverse aquatic life and is important for local fisheries and tourism. The secondary treatment provided helps reduce nutrient and organic pollution, mitigating the risk of eutrophication in the Adriatic coastal zone. The inland location reduces direct marine impact, but the cumulative effect of multiple discharges in the basin requires ongoing monitoring.