Dissolved oxygen control system, University of Saskatchewan

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Type of rearing unit:

Unit description:

• Four treatment conditions (oxygen concentration of 2, 3 and 4 mg/L) will be run simultaneously with 10 replicate tanks (9 liters / tank) for each treatment;
• The temperature of the water is controlled at 25ºC ± 1ºC with a titanium electrical heater;
• The water is distributed with four pumps among the replicate tanks directly from the head tank (control treatment condition) or via the vacuum tank.
• For each of the treatment conditions, an Enviro-monitron controller precisely regulates water flow at 125 ml/min.
• 0% recirculated water;
• Electronic controller and monitoring system (RF network included): 4 Enviro-monitron® controllers each with:
  • 1 DO probe,
  • 1 temperature probe,
  • 1 flow detector,
  • 1 conductivity probe,
  • 1 central computer,
  • Temperature and oxygen injection controlled;

Mandate: