ARA MG Herrnbaumgarten 2291 MI - Advanced Wastewater Treatment in Herrnbaumgarten, Austria

ARA MG Herrnbaumgarten 2291 MI is an advanced wastewater treatment facility located in Herrnbaumgarten, a town in the Mistelbach district of Niederösterreich, Austria. The plant serves a population of 1,638 and has a design capacity of 6,000 m³/day, with an actual discharge volume of 322.01 m³/day, indicating it operates well below its designed capacity. As an advanced treatment plant, it goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for facilities in sensitive areas under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant's scale places it in the small agglomeration category, for which the directive requires appropriate treatment to protect receiving waters. The treated effluent is discharged into local watercourses that drain into the Danube River basin, ultimately reaching the Black Sea. The plant plays a key role in protecting the local environment and downstream ecosystems from nutrient pollution and other contaminants.

The plant discharges into small streams in the Weinviertel region, which flow into the Thaya River and then the Morava River, a tributary of the Danube. The Danube carries the water to the Black Sea. The local watershed supports agricultural land and diverse aquatic life, and the advanced treatment helps prevent eutrophication in downstream water bodies.