Process for treating with a chemical compound a body of water used in aquaculture

A process for treating with at least one chemical compound a body of water comprising at least one living organism selected from the group consisting of fish, molluscs, crustaceans and aquatic plants, said process comprising adding said at least one chemical compound to the body of water and agitating the water with an agitation system comprising a pump and at least one submerged outlet equipped with an eductor nozzle, wherein said eductor nozzle comprises:

• a nozzle part (1) through which exits a liquid (A) pumped through the agitation system via the pump, wherein said liquid (A) comprises the chemical compound;
• an eductor part (3a) through which part of the water present in the body of water to be treated is sucked, via at least one suction opening (2b), said sucked water flow being called induced liquid (B);
• and
• a diffuser part (3b) in which the pumped liquid (A) and the induced liquid (B) are mixed and exit from the agitation system in the form of a total outlet flow (C),
• wherein:
• the eductor nozzle is such that the total outlet flow (C) exiting the eductor nozzle is from 4 to 6 times greater than the pumped liquid (A) flow rate exiting the nozzle part of the eductor nozzle;
• the body of water is a tank comprising water and defining a substantially enclosed body of water;
• the agitation system comprises a pump connected to a vertical pipe and a further horizontal pipe located on the bottom of the tank, said horizontal pipe comprising various outlets equipped with eductor nozzles;
• and the tank is also equipped with a sensor and a sampling device.