This offer includes the collection and disposal of surplus sludge, such as organic fertilizers, from wastewater treatment plants under Hjørring Vandselskab A / S: Hirtshals and Hjørring Wastewater treatment plants.

- Hirtshals Wastewater treatment plant: The amount of sludge approx. 3,000 tons / year,

- Hjørring Wastewater treatment plant: The amount of sludge approx. 5 500 tonnes / year.