VALLE DELL'INFERNO Wastewater Treatment Plant, Torrevecchia Teatina, Abruzzo

VALLE DELL'INFERNO is a municipal wastewater treatment plant located in the Silvidio area of Torrevecchia Teatina, in the province of Chieti, Abruzzo, Italy. The plant serves a small population of 800 residents, reflecting its role in a rural or peri-urban setting. Its designed capacity is 800 cubic meters per day, matching the population served, and it operates with secondary treatment. As a secondary treatment facility, VALLE DELL'INFERNO meets the minimum treatment 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. However, since the plant serves only 800 people (approximately 800 PE), it falls below the directive's mandatory threshold for collection and treatment, though it still provides secondary treatment. The plant's discharge volume is 295.89 cubic meters per day, indicating a utilization rate of about 37% of its designed capacity. The plant's treated effluent is discharged into the local drainage network, which ultimately flows into the Adriatic Sea, located less than 10 kilometers to the east. The coastal environment is ecologically sensitive, supporting diverse marine life and serving as an important area for fisheries and tourism. The proximity to the coast underscores the importance of effective treatment to prevent nutrient loading and protect water quality in the Adriatic Sea.

The plant discharges treated wastewater into local watercourses that drain into the Adriatic Sea, a semi-enclosed basin with limited water exchange, making it susceptible to eutrophication from nutrient inputs. The coastal zone near Torrevecchia Teatina supports diverse marine habitats, including seagrass meadows and fish nursery areas, which benefit from controlled nutrient and pollutant loads. Effective secondary treatment helps reduce organic matter and suspended solids, mitigating impacts on the receiving marine environment.