Vergato Riola Wastewater Treatment Plant, Riola, Emilia-Romagna, Italy

Vergato Riola is an advanced wastewater treatment plant located in Riola, a frazione of Vergato in the Emilia-Romagna region of northern Italy. The plant serves a population of approximately 2,596 residents and is part of the municipal wastewater infrastructure managed by the Unione dell'Appennino Bolognese. The plant employs advanced treatment processes, going beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,000 m³/day and a current discharge volume of 406.28 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Reno River basin, which flows through the Apennine mountains and into the Adriatic Sea. The plant plays a key role in protecting the water quality of the Reno River and the downstream coastal environment of the northern Adriatic.

The plant discharges into the Reno River basin, which flows from the Tuscan-Emilian Apennines to the Adriatic Sea near Venice. The Reno River supports diverse aquatic life and is an important migratory corridor for fish species. The advanced treatment helps protect the sensitive coastal ecosystem of the northern Adriatic, which is subject to eutrophication pressures from nutrient inputs.