Recirculation aquaculture systems

The aquaculture industry is the fastest growing food producing sector in the world. Farming of food fish is increasing and professionalizing rapidly due to the increasing demand for food, whereas, catches from wild populations are decreasing. In addition, the accruing concern about sustainability and welfare in fish, is also driving innovation in aquaculture.

Wageningen University & Research uses recirculation aquaculture systems (RAS) in the research facilities at CARUS. This technology allows culturing fish while minimizing the use of natural resources, such as water and energy.

Due to implementation of water treatment technologies waste streams are concentrated and treated efficiently. This minimizes and contains the nutrient emissions of these systems.

Constant culture conditions (water temperature, flows, pH, oxygen, carbon dioxide) and good hygienic management make these systems the first choice for the Dutch aquaculture sector, and these systems are implemented globally for various species.

Species produced in The Netherlands, African catfish, Claresse catfish, eel, trout, turbot, sole, sturgeon and yellowtail kingfish, are produced employing RAS. More and more hatcheries for sea bass, bream, salmon and other species set-up RAS to reduce water, energy consumption and nutrient emission. WUR is one the world leaders in this technology based on more than 30 years’ experience.