ARA Gostling 1640 SB - Advanced Wastewater Treatment Plant in Göstling an der Ybbs, Austria

ARA Gostling 1640 SB is an advanced wastewater treatment plant located in Göstling an der Ybbs, a municipality in the Bezirk Scheibbs district of Niederösterreich, Austria. The plant serves a population of approximately 1,753 residents and is designed to handle up to 7,000 m³ of wastewater per day, indicating capacity for future growth or seasonal fluctuations. As an advanced treatment facility, ARA Gostling 1640 SB goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive catchment areas. Austria implements the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for agglomerations above 10,000 population equivalent in sensitive areas, though this smaller plant likely meets local standards for protecting the Ybbs River. The plant discharges treated effluent into the Ybbs River, a tributary of the Danube. The Ybbs flows through the Alpine foothills and eventually joins the Danube near Ybbs an der Donau, contributing to the Danube basin. The advanced treatment helps protect downstream aquatic ecosystems and supports the ecological health of the Danube River system.

The plant discharges into the Ybbs River, which flows through the Ybbstal valley and joins the Danube River near Ybbs an der Donau. The Danube then continues to the Black Sea. The Ybbs River supports diverse aquatic life, including fish species such as brown trout and grayling, and its water quality is important for both ecological balance and recreational use. Advanced treatment at this plant helps minimize nutrient loading and protects the sensitive Alpine river ecosystem.