Method for controlling the oxygen content of the water at the outlet of a unit for dissolving oxygen in water, and unit for implementing the method

摘要

The invention relates to a method of controlling the oxygen content of water at an outlet of a unit for dissolving oxygen in water. The method comprises measuring the oxygen content Co of the water at the outlet of the unit with a sensor, and comparing the oxygen content Co with a setpoint value Cset. If the measured oxygen content Co is less than the setpoint value Cset, a cycle of feeding oxygen to the unit is initiated. The feed cycle comprises a period Ti of injecting oxygen into the unit, during which a valve controlling the flow rate of the oxygen feeding the unit is in the open position, and a pause period Tp during which the valve is in the closed position. The pause period corresponds substantially to the inertia of the unit in responding to the oxygen being injected. The invention also relates to units for dissolving oxygen in water. Particular applicability is found in fish farming.