fishfarming  [ Return towards  Applications  ]

Oxygen, feed and water are three key parameters in aquaculture. In particular, the availability of O2 in water has a direct effect on fish farm performance. Trends towards high fish densities mean adequate concentrations of dissolved O2 are necessary to offset natural decreases of oxygen in water. Hence, the control of O2 is one of the keys to success in any modern day aquaculture business.

• Technique

Whereas one liter of air contains 300 mg of oxygen, one liter of fresh water contains only one thirtieth of this amount.
This concentration varies according to:

The water source: sea water fresh water, stagnant water, underground water, river water, etc...
Temperature: a rise in temperature lowers the concentration of dissolved oxygen at saturation
Presence of organisms (algae or plants) producing or consuming oxygen
The water enrichment with O2 may be performed either with air or with pure O2. Compared with oxygenation using air the benefits of using oxygen are :

Better O2 transfer into water


Lower energy costs and hence reduced likelihood of power failure.


More efficient use of feed (better feed conversion ratio)


Improved growth and increased resistance to pathogenic organisms

• Oxygenation in basins and during transportation

Oxygenation can have two different applications: oxygenation of basins (hatching, fry and fish rearing) and oxygenation of water in bins used for the transport of live fish.

• AIR LIQUIDE offer

AIR LIQUIDE's offer is global. Our small network of technical food specialists, working in partnership with SEDIA and SINERGIA, two companies dedicated to fishfarming needs (feeding machines, oxygen regulation devices) evaluate O2 needs, size and install oxygenation equipment and O2 supply. Dedicated to high tech sites, our performance offer, the O2 regulation service OXYTOP, regulates O2 quantity injected in basins to the fish needs.