ARA Grosskrut 2112 MI Wastewater Treatment Plant, Althöflein, Austria

ARA Grosskrut 2112 MI is a wastewater treatment facility located in Althöflein, a locality in the municipality of Großkrut, in the Bezirk Mistelbach district of Niederösterreich, Austria. The plant serves a population of 1,217 and is part of the region's municipal wastewater infrastructure. As an advanced treatment plant, it likely employs processes such as biological nutrient removal to meet stringent effluent standards. With a designed capacity of 4,000 m³/day and an actual discharge volume of 338.84 m³/day, the plant operates well below its capacity, indicating room for future growth. Under the EU Urban Waste Water Treatment Directive, plants serving between 2,000 and 10,000 population equivalents require secondary treatment, but Austria often mandates higher standards for sensitive areas. The plant's treated effluent is discharged into local watercourses that drain into the Danube River basin, ultimately reaching the Black Sea. The facility plays a key role in protecting the region's water quality and supporting the ecological health of downstream aquatic habitats.

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 diverse aquatic life and is important for migratory fish species. The advanced treatment helps reduce nutrient loads, protecting downstream ecosystems from eutrophication.