IDL_RUOTI Wastewater Treatment Plant, Chianciano Terme, Tuscany

IDL_RUOTI is a former wastewater treatment plant located in Chianciano Terme, in the Tuscany region of Italy. The plant was situated along Strada della Chiana, serving the Unione dei Comuni Valdichiana Senese, which includes several municipalities in the Siena province. With a designed capacity of 10,000 cubic meters per day, it was a medium-scale facility for the region. The plant provided 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 oxidation and settling, reducing organic matter and suspended solids. Although the plant is now closed, its operational history reflects the regulatory framework that governs wastewater management in Italy, where regional authorities oversee compliance with EU directives. The plant's discharge likely entered the Chiana River, a tributary of the Arno River, which flows through Tuscany to the Tyrrhenian Sea. The Chiana Valley is an agriculturally important area, and proper wastewater treatment is essential to protect water quality in the Arno basin.

The plant's receiving water body was likely the Chiana River, which flows into the Arno River and ultimately reaches the Tyrrhenian Sea near Pisa. The Arno basin supports diverse aquatic life and is a key water resource for Tuscany. The Chiana Valley is a lowland area with intensive agriculture, making nutrient removal important to prevent eutrophication in downstream waters.