SCIGLIANO_COLLE_MANDRA Wastewater Treatment Plant, Scigliano, Calabria

SCIGLIANO_COLLE_MANDRA is a wastewater treatment plant located in Scigliano, a municipality in the province of Cosenza, Calabria, Italy. The plant serves a population of approximately 430 people, reflecting its role in a small rural community. It is situated inland, more than 10 km from the coast, within the Calabrian region known for its mountainous terrain and proximity to the Tyrrhenian and Ionian seas. The plant operates with primary treatment, which involves physical processes such as sedimentation to remove settleable solids. With a designed capacity of 1000 m³/day and a current discharge volume of 85.13 m³/day, the plant operates well below its capacity. As an Italian facility, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size unless a less sensitive area exemption applies. Primary treatment may be acceptable in certain coastal or mountainous areas with sufficient dilution. The treated effluent is discharged into local watercourses that ultimately drain toward the Ionian Sea or Tyrrhenian Sea, depending on the specific watershed. The Calabrian region features numerous small rivers and streams that support diverse aquatic ecosystems. The plant's discharge contributes to the local water cycle, and its primary treatment level means that some organic load and nutrients may still be present in the effluent, potentially affecting downstream water quality.

The plant discharges into local streams that are part of the Calabrian watershed, eventually reaching the Ionian Sea or Tyrrhenian Sea. The region's rivers support diverse aquatic life, including fish and invertebrates, and are important for local agriculture. Primary treatment reduces suspended solids but may not fully remove nutrients, which could contribute to eutrophication in downstream coastal areas if not adequately diluted.