REVELLO Wastewater Treatment Plant, Revello, Piemonte, Italy

REVELLO is a wastewater treatment plant located in Revello, a town in the Piemonte region of northern Italy. The facility serves a population of approximately 2,350 and is situated in the Po River basin, which drains much of northern Italy into the Adriatic Sea. The plant is classified as a small agglomeration under Italian and EU regulations. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. With a designed capacity of 2,500 m³/day and an actual discharge volume of 504.87 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The treated effluent is discharged into a local watercourse that ultimately feeds into the Po River, one of Italy's most important rivers, supporting agriculture, industry, and ecosystems in the Po Valley. The plant's operation helps protect downstream water quality and the sensitive habitats of the Po Delta, a region of ecological significance. By meeting EU standards, REVELLO contributes to the health of the Adriatic Sea and the broader Mediterranean environment.

The plant discharges into a tributary of the Po River, which flows eastward through the Po Valley and into the Adriatic Sea near Venice. The Po basin is a densely populated and agriculturally intensive region, making wastewater treatment critical for controlling nutrient pollution and safeguarding aquatic ecosystems. The downstream Po Delta is an ecologically sensitive area that supports diverse birdlife and fish species, and the plant's secondary treatment helps reduce organic load and nutrient inputs that could otherwise contribute to eutrophication in the Adriatic.