Project Details


Based on the success with the development and implementation of Danish model trout farms in freshwater, a somewhat similar concept was developed for sea water farming of large trout and potentially also salmon in land-based, recirculating systems. Design and technology for the recirculation unit as well as for end-of-pipe treatment were developed and tested in 3 consecutive seasons.

During the project, design and operation were optimized and documented. End-of-pipe treatment, especially related to nitrogen removal and sludge hydrolysis were also investigated.
Based on the concept and the results achieved in the major unit in commercial scale at DTU Aqua premises in Hirtshals, it can be concluded that there is potential for such open land-based sea water farming units and that they can be operated commercially sustainable. Major issues related to reducing/preventing (toxic) algal blooms and supersaturation in seawater needs to be addressed before commercial operations should be initiated, though.

The project was coordinated by North Sea Science Park, Denmark and funded by the Danish Ministry of Food, Agriculture and Fisheries through the Green Development and Demonstration Program (GUDP) and the partners involved.

Research area: Aquaculture
Effective start/end date01/01/201131/12/2015

Collaborative partners

  • Technical University of Denmark (lead)
  • BioMar A/S (Project partner)
  • RK Plast A/S (Project partner)
  • AquaPri A/S (Project partner)
  • Billund Aquaculture Service Aps (Project partner)
  • North Sea Science Park (Project partner)
  • Grundfos DK AS (Project partner)


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