Overview
ARA Zwettl 3423 ZT serves approximately 33,733 people in Zwettl, Niederösterreich, Austria. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
ARA Zwettl 3423 ZT is a municipal wastewater treatment plant located in Zwettl, Niederösterreich, Austria. Serving a population equivalent of around 33,733, the facility is part of the region's wastewater infrastructure, handling domestic and industrial flows from the Zwettl area. As a plant serving a medium-sized agglomeration in Austria, it is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC. This directive requires secondary treatment for discharges into freshwater and estuaries for populations over 10,000, with more stringent tertiary treatment in sensitive areas. The plant's design and operation align with these regulatory standards to ensure adequate treatment before discharge. The treated effluent from ARA Zwettl is discharged into local watercourses that eventually drain into the Danube River basin. The Danube is a major European waterway, supporting diverse aquatic ecosystems and providing water for agriculture and industry downstream. The plant's operations help protect the water quality of these receiving waters, contributing to the ecological health of the region.
Environmental context
The plant discharges into tributaries of the Kamp River, which flows into the Danube River near Krems. The Danube is a vital ecological corridor in Central Europe, supporting diverse fish species and migratory birds. The plant's treatment helps maintain water quality in this sensitive river system, which is important for both biodiversity and human use downstream.
Frequently asked questions
ARA Zwettl 3423 ZT is located in Zwettl, Niederösterreich, Austria, at coordinates 48.6120 N, 15.1850 E.
The plant serves approximately 33,733 people, classifying it as a medium-sized agglomeration under EU regulations.
The treated effluent is discharged into local tributaries of the Kamp River, which flows into the Danube River, eventually reaching the Black Sea.
As an Austrian plant serving over 10,000 people, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment and, in sensitive areas, tertiary treatment.
For agglomerations of this size in Austria, secondary treatment is standard, with tertiary treatment often applied in sensitive catchments to reduce nutrients and protect water bodies.
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