Gelsted Renseanlæg - Advanced Wastewater Treatment in Gelsted, Denmark

Gelsted Renseanlæg is a municipal wastewater treatment facility located at Hønnerupvej 27 in Gelsted, part of Middelfart Municipality in the Region of Southern Denmark. The plant serves a population of 1,668 and operates with a designed capacity of 3,800 m³/day, currently discharging 745.67 m³/day of treated effluent. The plant employs advanced treatment processes, which exceed the secondary treatment standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. As a Danish facility, it operates under national regulations that implement the directive, ensuring high effluent quality to protect sensitive receiving waters. The treated wastewater is discharged into the local water system, which ultimately drains into the Little Belt strait, a part of the Baltic Sea. This coastal discharge location requires stringent treatment to safeguard marine ecosystems, including fish spawning grounds and migratory bird habitats in the region.

The plant discharges into the Little Belt strait, a narrow waterway connecting the Kattegat and the Baltic Sea. This area supports diverse marine life, including cod and herring spawning grounds, and serves as a migratory corridor for seabirds. The advanced treatment level helps minimize nutrient loading and protect the sensitive coastal environment.