Sustainable technologies to control microalgae in land based saltwater recirculating systems (39032)

Project Details


Land based salt water recirculating systems is a potential alternative to fish farming in net pens. This purpose of this project was to test different solutions on how to control unwanted microalgae growth thereby addressing a potential challenges associated with land based farming.

A high degree of water reuse and the associated nutrient accumulation may favour growth of microorganisms and thereby deteriorate the biological water quality.

The project included:
-Test of improved mechanical filtration (application of pilot scale protein skimmers on small to medium sized RAS, and application of full scale 4 meter vacuum airlift; an innovative treatment technique tested in full scale RAS)
-Test of chemical water treatment routines using easy degradable disinfectants (Peracetic acid, chloramine-T, hydrogen peroxide)to control and inhibit toxic microalgae,
-Test of electrochemical oxidation disinfection technology to assess the efficacy (radical formation and algicidal effects) of boron doped diamond electrodes.
Numerous batch and pilot scale experiments were made at the section for Aquaculture, Hirtshals. In addition, intensive, diurnal sampling/monitoring and analysis on location was performed on a commercial pike perch RAS facilities facing toxic algae problems.

The project was coordinated by DTU Aqua and funded by the National Environmental Protection Agency through Programme for Development and Demonstration of Bio-technologies (MUDP).

Research area: Aquaculture
Research area: Marine Populations and Ecosystem Dynamics
Effective start/end date01/01/201330/11/2013

Collaborative partners

  • Technical University of Denmark (lead)
  • AquaPri A/S (Project partner)
  • University of Copenhagen (Project partner)
  • Billund Aquaculture Service Aps (Project partner)
  • Electrocell A/S (Project partner)
  • The Danish Environmental Protection Agency (Project partner)


Explore the research topics touched on by this project. These labels are generated based on the underlying awards/grants. Together they form a unique fingerprint.