Launch of ozone application in freshwater fish farms (Lanozo) (39595)

Project Details


The accumulation of suspended bacteria and micro-particles poses a great challenge for recirculating aquaculture systems (RAS). Microparticles (1-40 µm) cannot be removed by traditional measures (sludge-cones, drum screen filter) and protein skimming is only done in saltwater due to the characteristic surface tension, small bubble size and associated removal efficacy.

The aim of this project is to explore and test well-known water treatment technologies (ozone and protein skimmers) to improve water quality in freshwater fish farms by removing accumulated microparticles. The project include both controlled lab experiments and tests performed in full scale commercial RAS.

The expected work package activities in the project include:

- Identify technologies to effectively remove accumulated micro-particles in freshwater.
- Testing methods for removing microparticles and foams on fish farms.
- Evaluate combination of ozone and protein skimmer under controlled conditions.
- Document potential of ozone and protein skimmers with tests on a commercial fish farm.

DTU Aqua, National Institute of Aquatic Resources (coordinator)
Danish Aquaculture Association, Denmark
Snaptun Frys, Denmark
Commercial fish farmers, Denmark

The project is funded by the European Maritime and Fisheries Fund (EMFF) and the Danish Fisheries Agency.

Research area: Aquaculture
Effective start/end date01/01/201931/12/2020