San Giorgio della Richinvelda Borgo Leone Wastewater Treatment Plant, Domanins, Italy

The San Giorgio della Richinvelda Borgo Leone wastewater treatment plant is located in Domanins, a frazione of San Giorgio della Richinvelda in the Friuli-Venezia Giulia region of northeastern Italy. The plant serves a small population of 200 people, reflecting its role in a rural or peri-urban setting. As a facility in Italy, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires appropriate treatment for agglomerations of this scale. The plant provides primary treatment, which involves physical processes like sedimentation to remove settleable solids. With a designed capacity of 800 m³/day and an actual discharge volume of 39.59 m³/day, the plant operates well below its capacity, indicating low utilization. The regulatory framework for such small plants in Italy typically mandates secondary treatment unless the receiving waters are less sensitive, as per EU directives. The treated effluent is discharged into local watercourses that eventually drain into the Adriatic Sea via the Tagliamento River basin. The region is known for its agricultural landscape and proximity to the Venice Lagoon ecosystem. The plant's discharge contributes to the overall water quality management in the Friuli-Venezia Giulia region, supporting downstream aquatic habitats and human uses.

The plant discharges into local streams that are part of the Tagliamento River basin, one of the last morphologically intact river systems in the Alps. The Tagliamento flows into the Gulf of Venice in the Adriatic Sea. The downstream environment includes ecologically sensitive areas such as the Venice Lagoon, which supports diverse aquatic life and migratory bird populations. Primary treatment reduces suspended solids but does not remove nutrients, so the plant's discharge may contribute to nutrient loading in the watershed.