Process and facility for regulating the amount of oxygen supplied to animal drinking water

A facility for rearing animals, including for conveying water to the animals for their watering, the facility comprising:

• an injector (7, 8) configured to inject a gas into water;
• a water inlet line (20) and a gas inlet line (3, 4, 5, 6) arriving in the injector;
• a source (1) of oxygen or of a gas mixture comprising oxygen, capable of delivering oxygen into the gas inlet line,
• a tank (17) of water at atmospheric pressure, the injector being supplied with water from the water in the tank, wherein the tank is furthermore supplied with new water (20);
• a coil (10) capable of receiving water charged with dissolved oxygen coming from the injector, wherein the water arrives at the coil by virtue of a pump (9), and the coil creates a water/oxygen contact time;
• the water coming out of the coil passing through a device so that it is directed in full to the watering zone or else partly to the watering zone and partly to the tank (17),
• wherein the facility performs two simultaneous injections of oxygen or of a mixture containing oxygen into the water, one (3, 5, 7) upstream of the pump and the other (4, 6, 8) downstream of the pump (9), the flow rate of the injection performed upstream being lower than the flow rate performed downstream of the pump.