IDL_TORRENIERI Wastewater Treatment Plant, Montalcino, Toscana

IDL_TORRENIERI is a wastewater treatment plant located in Montalcino, in the Toscana region of Italy. It serves a population of approximately 3,975 people and has a designed capacity of 15,000 m³/day, indicating it is sized for future growth or seasonal peaks. The plant is situated inland, away from coastal areas. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring compliance with EU effluent standards before discharge. The treated effluent is discharged into local water bodies that eventually drain into the Tyrrhenian Sea via the Ombrone River basin. The plant plays a key role in protecting the region's water quality, supporting both local ecosystems and downstream environments in the Toscana watershed.

The plant discharges into local streams that feed into the Ombrone River, which flows through the Toscana region and empties into the Tyrrhenian Sea. The downstream environment includes ecologically sensitive areas that support diverse aquatic life and agricultural activities. The secondary treatment helps reduce nutrient loads, mitigating eutrophication risks in the coastal zone.