ARA Lassee 53 GF - Advanced Wastewater Treatment Plant in Lassee, Austria

ARA Lassee 53 GF is a wastewater treatment facility located in Lassee, a municipality in the Bezirk Gänserndorf district of Niederösterreich, Austria. The plant serves a population of about 1,420 people and is designed to handle a capacity of 3,700 cubic meters per day, with an actual discharge volume of 558 cubic meters per day. As an advanced treatment plant, ARA Lassee 53 GF employs tertiary-level processes to ensure high-quality effluent. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), Austrian plants of this scale are required to meet stringent standards for nutrient removal, particularly in sensitive areas. The plant's advanced treatment level indicates it likely incorporates biological nutrient removal or similar technologies. The treated wastewater is discharged into local watercourses that ultimately drain into the Danube River basin. The Danube is a major European river flowing into the Black Sea, supporting diverse aquatic ecosystems. The plant's advanced treatment helps protect downstream water quality in the Danube and its tributaries, which are ecologically significant for fish migration and biodiversity.

The plant discharges into the local drainage network within the Danube River basin. The Danube flows eastward through Central and Eastern Europe before emptying into the Black Sea. This watershed supports a wide range of aquatic life, including migratory fish species such as sturgeon. Advanced treatment at this plant reduces nutrient loads, helping to prevent eutrophication in downstream lakes and the Black Sea coastal zone.