Frazione Castello Wastewater Treatment Plant, Alvito, Lazio, Italy

Frazione Castello is an advanced wastewater treatment plant located in Alvito, a town in the Lazio region of Italy. The plant serves a small population of 400 people, reflecting its role in a rural or small-scale municipal setting. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 400 cubic meters per day and a current discharge volume of 79.19 cubic meters, 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 mandates appropriate treatment levels for agglomerations of this size. The treated effluent is discharged into local water bodies that eventually drain into the Tyrrhenian Sea via the Liri-Garigliano river system. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the region.

The plant discharges into local streams that feed into the Liri River, which flows into the Garigliano River and ultimately reaches the Tyrrhenian Sea. The area supports diverse aquatic life and is part of a watershed that provides water for agriculture and communities. Advanced treatment helps minimize nutrient loading and protects downstream habitats.