Impianto Saggio Wastewater Treatment Plant, Patti, Sicily

Impianto Saggio is a wastewater treatment plant located in Patti, a town in the province of Messina, Sicily, Italy. The plant serves a population of 1,570 and is situated near the coastal area of the Tyrrhenian Sea. As a small-scale facility, it plays a role in managing local domestic wastewater. The plant provides primary treatment, which involves physical processes such as sedimentation to remove settleable solids. With a designed capacity of 2,200 cubic meters per day and an actual discharge volume of 310.80 cubic meters per day, the plant operates well below its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent (PE) between 2,000 and 10,000 are typically required to have secondary treatment, but this plant falls below that threshold, meaning primary treatment may be acceptable depending on the receiving water's sensitivity. The treated effluent is discharged into the coastal waters of the Tyrrhenian Sea, which is part of the Mediterranean Sea. The proximity to the coast (within 10 km) means the discharge could affect local marine ecosystems, including seagrass meadows and coastal habitats. The plant's location in a seismically active region also adds to operational considerations.

The plant discharges into the Tyrrhenian Sea, a basin of the Mediterranean Sea. The coastal waters near Patti support diverse marine life, including Posidonia oceanica seagrass meadows, which are ecologically sensitive and provide nursery habitats for fish. The discharge of primary-treated effluent may contribute to nutrient loading, potentially affecting water quality and marine biodiversity in the area.