Oxidation process of the wet oxidation or ozonization type

A process of oxidation of a liquid contained in a reactor by means of an oxidizing gas with the reactor, comprising:

• at least one means of introduction of gas into the reactor and at least one means of introduction of liquid into the reactor,
• at least one means of withdrawal of liquid,
• at least one means of agitation of liquid,
• at least one duct permitting the aspiration of gas present in the reactor and opening into the liquid contained in the reactor, and
• with the process being comprised of
• the liquid and the gas being introduced into the reactor in quantities such that a gas headspace is formed above the liquid contained in the reactor,
• mixing the gas and liquid with the gas of the gas headspace being aspirated into the duct and introduced into the liquid present in the reactor at the level of the means of agitation of the liquid so as to dissolve at least a portion of the gas in the liquid, and
• recovering the portion of the gas which is introduced into the liquid present in the reactor and which is not dissolved in the liquid in the gas headspace,
• wherein during the step of mixing the gas and liquid, the means of agitation of the liquid
• creates a flow of liquid in the space immediately adjacent to the end of the duct opening into the liquid and generates a gas/liquid dispersion in the zone in the neighborhood of the said space, termed pre-reaction zone, within which the liquid reacts with the gas, and then
• conveys and ejects at its periphery the said gas/liquid dispersion in a substantially horizontal direction, such that the gas is dissolved in the liquid in the zone extending from the agitation means to the surface of the liquid, termed mixing zone.