Overview
IDL_SAN_COLOMBANO is a large wastewater treatment plant serving Scandicci, Tuscany, Italy. It treats wastewater for over 620,000 people and discharges into the Arno River basin.
IDL_SAN_COLOMBANO is a major wastewater treatment plant located in San Colombano, Scandicci, in the Tuscany region of Italy. It serves a population of approximately 621,701, classifying it as a large agglomeration under EU regulations. The plant is situated near the Arno River, which flows through Florence and into the Tyrrhenian Sea. As a large-scale facility, IDL_SAN_COLOMBANO is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires tertiary treatment for agglomerations over 150,000 population equivalent in sensitive areas. The Arno River basin is designated as a sensitive area due to eutrophication risks, so the plant is expected to provide advanced treatment to remove nutrients like nitrogen and phosphorus. The treated effluent is discharged into the Arno River, which flows through Florence and eventually reaches the Tyrrhenian Sea near Pisa. This water body supports diverse aquatic life and is an important ecological corridor. The plant plays a critical role in protecting the Arno's water quality and the coastal marine environment from nutrient pollution.
Environmental context
The plant discharges into the Arno River, which flows through Florence and the surrounding plains before emptying into the Tyrrhenian Sea near Pisa. The Arno basin is ecologically sensitive, supporting diverse fish populations and migratory birds. Downstream, the coastal area includes important habitats for marine species. Nutrient loading from wastewater can contribute to eutrophication in the Tyrrhenian Sea, making advanced treatment essential for protecting this ecosystem.
Frequently asked questions
IDL_SAN_COLOMBANO is located in San Colombano, Scandicci, in the Tuscany region of Italy, near the Arno River.
The plant serves approximately 621,701 people, making it a large agglomeration under EU classification.
Treated wastewater is discharged into the Arno River, which flows through Florence and ultimately reaches the Tyrrhenian Sea.
As an Italian plant serving over 150,000 people, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates tertiary treatment in sensitive areas like the Arno basin.
For large agglomerations in sensitive areas, Italian plants typically provide tertiary treatment including biological nutrient removal to reduce nitrogen and phosphorus before discharge.
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