Overview
The Bolzano wastewater treatment plant serves over 310,000 people in Kollmann-Colma, Italy. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
The Bolzano wastewater treatment plant is located in Kollmann-Colma, near Bolzano in the Trentino-Alto Adige/Südtirol region of northern Italy. It serves a population of over 310,000, classifying it as a large agglomeration under EU regulations. The plant is situated in the Eisack Valley, an Alpine setting that influences its operational and environmental context. As a large agglomeration, the plant is required to meet the standards of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum, and tertiary treatment if the receiving waters are sensitive. The regulatory framework ensures that facilities of this scale in sensitive Alpine regions typically employ advanced treatment to protect downstream ecosystems. The treated effluent is discharged into the Eisack River, a tributary of the Adige River, which flows south through the Adige Valley into the Adriatic Sea near Venice. The plant plays a critical role in protecting the water quality of the Adige basin, which supports diverse aquatic life and is used for irrigation and recreation. Its operation is essential for maintaining the ecological health of this Alpine river system.
Environmental context
The plant discharges into the Eisack River, which joins the Adige River near Bolzano. The Adige flows through the Po Valley and enters the Adriatic Sea. This watershed supports sensitive aquatic ecosystems, including fish species like the marble trout, and is a key water resource for agriculture and tourism in the region. The Alpine terrain and seasonal flow variations require robust treatment to prevent nutrient enrichment and protect downstream habitats.
Frequently asked questions
The Bolzano wastewater treatment plant is located in Kollmann-Colma, near Bolzano in the Trentino-Alto Adige/Südtirol region of northern Italy, along the Brennerstraße in the Eisack Valley.
The plant serves a population of over 310,000, classifying it as a large agglomeration under the EU Urban Waste Water Treatment Directive.
The treated effluent is discharged into the Eisack River, a tributary of the Adige River, which ultimately flows into the Adriatic Sea.
As an Italian plant serving over 150,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment and potentially tertiary treatment for sensitive areas.
For large agglomerations in Italy, the EU directive mandates secondary treatment as a minimum. In sensitive Alpine regions like the Adige basin, tertiary treatment for nutrient removal is often required to protect water quality.
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