About Nordic Network on Recirculating Aquaculture Systems

The Nordic Network on Recirculating Aquaculture Systems was formally founded at a steering committee meeting in April 2011 at DTU Aqua, Hirtshals, Denmark, with country representatives from Denmark, Norway, Sweden, Finland and Iceland.

The major aims of the network are to co-ordinate and strengthen research and development of recirculating aquaculture systems (RAS) in Nordic countries.

The network is open to everyone with an interest in RAS related activities.  



The objectives of the network are to:

  • Contribute to the development of high-standard RAS research, innovation, and expansion of the RAS industry in Nordic countries. 
  • Facilitate the co-operation between not-yet connected educational and industrial partners. 
  • Facilitate the work of regional projects and add synergy to already established contacts. 
  • Support training of practicians and fish farmer organizations. 
  • Support research training of Master and Ph.D. students, and facilitate exchange of students.

Duration and Financing 

The Nordic Council of Ministers (NCM) financed the first two years of the network (2011-2012). Since then, a workshop focusing on RAS related research has been held every other year with partial support from NCM. Biennial workshops will continue to be held for as long as members show interest, and future funding opportunities allow.

So far six workshops have been held:

  • Helsinki (Finland), October 2011
  • Aalborg (Denmark), October 2013
  • Molde (Norway), October 2015
  • Aalborg (Denmark), October 2017
  • Berlin (Germany), October 2019
  • Tromsø (Norway), October 2023

Next workshop will be held in 2025 at a venue and dates to be announced! 




Nordic Council logo

All workshops so far have been partially supported
by AG-Fisk/Nordic Council of Ministers.

What are RAS?

RAS. Photo: Martin Dam Kristensen. 

Recirculating aquaculture systems (RAS) are intensive fish and shellfish rearing systems that re-use the water after it has undergone various treatment processes such as mechanical and biological filtration.  

As a consequence, the discharge of nutrients and organic matter from farms applying RAS technologies is considerably reduced compared to more traditional systems.

21 MAY 2024