Overview
Mittleres Trattnachtal is an advanced wastewater treatment plant in Strötting, Oberösterreich, Austria, serving approximately 3,725 people with a design capacity of 5,625 m³/day.
Mittleres Trattnachtal is a wastewater treatment plant located in Strötting, a locality in the municipality of Hofkirchen an der Trattnach, Bezirk Grieskirchen, Oberösterreich, Austria. The plant serves a population of about 3,725 and has a design capacity of 5,625 m³/day, with an average discharge volume of 917.97 m³/day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients such as nitrogen and phosphorus. This level of treatment is consistent with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas, ensuring high-quality effluent before discharge. The treated wastewater is discharged into the Trattnach River, a tributary of the Innbach, which flows into the Danube River. The Danube ultimately drains into the Black Sea. The plant plays a key role in protecting the local water quality and the downstream aquatic ecosystems, including the Danube Delta, a region of high ecological importance.
Environmental context
The plant discharges into the Trattnach River, which flows into the Innbach and then the Danube River, eventually reaching the Black Sea. The Danube basin supports diverse aquatic life and is an important migratory corridor for fish species. Advanced treatment helps minimize nutrient loading, protecting downstream water bodies from eutrophication.
Frequently asked questions
The plant is located in Strötting, a locality in Hofkirchen an der Trattnach, Bezirk Grieskirchen, Oberösterreich, Austria.
The plant serves approximately 3,725 people.
The treated wastewater is discharged into the Trattnach River, which flows into the Innbach and then the Danube River, ultimately reaching the Black Sea.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, in line with EU standards for sensitive areas.
As a plant serving a population under 10,000, it is classified as a small agglomeration. The EU directive requires appropriate treatment, and advanced treatment is often applied in sensitive catchments like the Danube basin.
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