RUNDFORBI Wastewater Treatment Plant, Trørød, Denmark

RUNDFORBI is a former wastewater treatment plant located in Trørød, within the Rudersdal Municipality of Denmark's Region Hovedstaden. The plant was designed with an advanced treatment level and a capacity of 3,500 cubic meters per day, serving the local community before its closure. As an advanced treatment facility, RUNDFORBI would have been subject to Denmark's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires stringent nutrient removal for discharges into sensitive areas. The plant's coastal proximity likely necessitated tertiary treatment to protect the marine environment. The plant's discharge would have entered the Øresund strait, which connects the Baltic Sea to the Kattegat. This water body supports diverse marine life and is an important migratory corridor for fish and birds.

RUNDFORBI is situated near the Øresund, a strait that links the Baltic Sea with the Kattegat and ultimately the North Sea. This coastal area supports a rich marine ecosystem, including fish spawning grounds and bird habitats. The advanced treatment level was likely required to minimize nutrient loading and protect the sensitive marine environment from eutrophication.