HOJBY, Højby | Denmark Wastewater

Overview

HOJBY wastewater treatment plant in Højby, Denmark, serves 3,140 people with advanced treatment. It discharges 603.49 m³/day and is located within 10 km of the coast.

HOJBY is an advanced wastewater treatment plant located in Højby, Odsherred Kommune, Region Sjælland, Denmark. The facility serves a population of 3,140 and has a designed capacity of 4,500 m³/day, with a current discharge volume of 603.49 m³/day. As an advanced treatment plant, HOJBY provides a higher level of nutrient removal than secondary treatment, which is typical for Danish plants discharging into sensitive coastal waters. Denmark implements the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires tertiary treatment for discharges into sensitive areas, including coastal zones. The plant's discharge enters the local watershed and ultimately reaches the Kattegat sea via the Isefjord or nearby coastal waters. This coastal environment supports diverse marine life and is an important area for fisheries and recreation. The advanced treatment helps protect water quality in the sensitive coastal ecosystem.

Environmental context

HOJBY discharges into the local watershed that drains to the Kattegat, a sea area between Denmark and Sweden. The Kattegat is a productive marine environment supporting fish stocks, seabirds, and benthic habitats. As a coastal plant within 10 km of the sea, its advanced treatment reduces nutrient loading, which is critical to prevent eutrophication in the sensitive Baltic Sea region.

Frequently asked questions

HOJBY is located in Højby, Odsherred Kommune, Region Sjælland, Denmark, near the coast of the Kattegat sea.

HOJBY serves a population of 3,140 people in the Højby area.

HOJBY discharges treated wastewater into the local watershed, which flows to the Kattegat sea. The plant uses advanced treatment to remove nutrients before discharge.

As a Danish plant serving a population under 10,000, HOJBY is classified as a small agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). For discharges into sensitive coastal areas, advanced treatment is required to protect the marine environment.

In Denmark, plants serving around 3,000 people typically provide advanced treatment, including nutrient removal, especially if discharging into sensitive coastal waters. This aligns with national implementation of the EU directive.