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Primozone - Aquaculture

 Need a new partner for your ozone installation?

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Or send an e-mail to Dan Johansson,
Sales Manager Aquaculture ››

Ozone solutions for RAS aquaculture
Our Productareas

Aquaculture references

Ozone at aquaculture increases productivity

Freshwater Institute

At the Freshwater Institute, WV, USA, they are convinced that ozone water treatment is essential to optimize production in water recirculating aquaculture systems (RAS). Scientists at the Freshwater Institute have been studying ozonation for years but have never before used such a sophisticated ozone generator as the Primozone® GM ozone generator.

Read more about our installation at the Freshwater Institute here ››

More aquaculture references

Valperca Fish Farm, Switzerland

Bell Aquaculture, Indiana, USA

SalMar Smolt Hatchery, Norway



Research shows that water treatment with ozone increases productivity at RAS aquaculture systems

Three reasons why ozone in aquaculture improves water quality and increase aquaculture productivity

As recirculating aquaculture systems (RAS) operate by reusing the fish tank water it is essential to control the water quality. Many studies show that treating RAS systems with ozone increases productivity as fish health and survival is increased.

At RAS the organic load tend to be high and the homogeneous fish stock leads to a high risk of infections and problems with bacteria, fungi and viruses. Although ozone is not primarily used for disinfection at RAS the reduction of solids and DOC often creates an environment that is less favourable for bacterial growth and thus creates a reduced need for disinfection.

1. Removal of colloidal solids with ozone micro flocculation

The organic load is a constant concern for RAS systems, especially when the fish density is high and the water exchange rate low. Ozone has the ability to cause clumping or micro flocculation of fine and colloidal solids, which in turn facilitates removal by filtration and sedimentation.

2. Removal of dissolved organic compounds

Ozone changes the characteristics of the dissolved organic compounds (DOC) by oxidation and precipitation which makes it easier to remove the DOC by bio filtration and sedimentation.

3. Turn lethal nitrite into harmless nitrate with ozone treatment

A high organic load is a favorable environment for nitrite growth. When reducing the organic load with ozone treatment the risk of nitrite growth is also reduced. Ozone also has the ability to oxidize nitrite to nitrate.

Suffer any of the above problems with water quality at your RAS plant? Contact our Aquaculture Specialist Dan Johansson.

To find out more about how ozone increases productivity in RAS, please read our article published in Global Aquaculture Advocate and FishFarmer Magazine.

How Primozone can help you increase productivity with ozone water treatment.

Primozone offers unique solutions for water treatment of recirculating aquaculture. We offer ozone generators and ozone water treatment systems that are especially designed for the aquaculture market. The Primozone OM-series ozone generators have several advantages that applies to aquaculture fish farming such as

  • compact in size
  • built in redundancy
  • easy to operate
  • low life cycle cost
  • ozone levels automatically controlled by redox/orp values in each tank
  • ozone distribution module that can distribute ozone to several different tanks with individual ozone dosage


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