HUMMINGEN Wastewater Treatment Plant, Hummingen, Denmark - Coastal Primary Treatment

HUMMINGEN is a wastewater treatment plant located in Hummingen, Lolland Municipality, Region Sjælland, Denmark. It serves a population of 1,355 and has a designed capacity of 2,000 m³/day, with an average discharge volume of 268.47 m³/day. The plant provides primary treatment, which is the minimum level required under the EU Urban Waste Water Treatment Directive for agglomerations of this size, though secondary treatment is typically expected for coastal discharges. As a coastal facility within 10 km of the Baltic Sea, HUMMINGEN operates under Denmark's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC). For small agglomerations (under 2,000 population equivalent) discharging to coastal waters, primary treatment may be considered appropriate if studies show no adverse environmental impact. The plant's discharge contributes to the nutrient load in the Baltic Sea, a sensitive marine environment prone to eutrophication. The treated effluent from HUMMINGEN ultimately reaches the Baltic Sea via local drainage. The Baltic Sea is a semi-enclosed brackish sea with limited water exchange, making it highly sensitive to nutrient pollution. Denmark's regulatory framework requires monitoring and reporting to ensure compliance with EU directives aimed at reducing nitrogen and phosphorus inputs to this vulnerable water body.

HUMMINGEN plant discharges treated wastewater into local watercourses that drain into the Baltic Sea, a semi-enclosed brackish sea with limited water exchange and high sensitivity to nutrient enrichment. The Baltic Sea faces eutrophication challenges from nitrogen and phosphorus inputs, making treatment level and discharge volume critical for local marine ecology. The plant's coastal location within 10 km of the sea means its effluent directly influences nearshore water quality and supports diverse aquatic life in the region.