Flintholm Wastewater Treatment Plant, Steinbergholz, Schleswig-Holstein, Germany

Flintholm is a wastewater treatment plant located in Steinbergholz, within the municipality of Steinberg, in the Schleswig-Flensburg district of Schleswig-Holstein, Germany. The plant serves a population of 2,556 and is situated near the Geltinger Bucht, a bay of the Baltic Sea. As a facility in a coastal region, it plays a key role in protecting the local marine environment. The plant operates with advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,500 cubic meters per day and an actual discharge volume of 429.09 cubic meters per day, the plant has ample capacity to handle current loads. Advanced treatment typically includes nutrient removal, which is critical for sensitive coastal areas to prevent eutrophication. The treated effluent is discharged into the Geltinger Bucht, part of the Baltic Sea. This coastal ecosystem supports diverse aquatic life and is an important area for migratory birds. The plant's advanced treatment helps minimize nutrient inputs, contributing to the ecological health of the Baltic Sea, which faces challenges from eutrophication and algal blooms.

Flintholm discharges into the Geltinger Bucht, a coastal inlet of the Baltic Sea. The Baltic Sea is a brackish water body with limited water exchange, making it sensitive to nutrient pollution. The advanced treatment at Flintholm reduces nitrogen and phosphorus loads, helping to protect the local marine ecosystem, which supports fish populations and migratory waterfowl. The plant's location within 10 km of the coast underscores its role in safeguarding coastal water quality.