Abstract: A method and plant for wet-route oxidation treatment of hazardous organic waste products, notably radioactive wastes, which may contain mineral fillers, the waste products being treated in a secure environment. The plant comprises a closed space, with a mechanism for bringing a volume of hazardous organic waste products containing mineral fillers, adding a given quantity of water mixed with a base to the predetermined volume in order to adjust the pH to a determined value so as to make a solution and/or a liquid suspension, with a pressure reactor and with mechanism for transferring the solution and/or liquid suspension into the pressure reactor, and a device for introducing an oxygen atmosphere into the pressure reactor and for pressurizing the atmosphere. A heating mechanism is provided for subjecting the contents of the pressure reactor to heat treatment at a temperature between 150° and 350° C. to complete the wet-route oxidation.

Abstract: A method and plant for wet-route oxidation treatment of hazardous organic waste products, notably radioactive wastes, which may contain mineral fillers, the waste products being treated in a secure environment. The plant comprises a closed space, with a mechanism for bringing a volume of hazardous organic waste products containing mineral fillers, adding a given quantity of water mixed with a base to the predetermined volume in order to adjust the pH to a determined value so as to make a solution and/or a liquid suspension, with a pressure reactor and with mechanism for transferring the solution and/or liquid suspension into the pressure reactor, and a device for introducing an oxygen atmosphere into the pressure reactor and for pressurizing the atmosphere. A heating mechanism is provided for subjecting the contents of the pressure reactor to heat treatment at a temperature between 150 and 350° C. to complete the wet-route oxidation.

Abstract: A method and device for the wet oxidation treatment of liquid waste laden with mineral matter in suspension. The device comprises a reactor including a treatment column, first and second heat exchangers placed upstream and downstream, respectively, of the reactor. The solution to be treated, laden with mineral matter to which an oxidizing gas has been added, is injected into the reactor for treatment after being preheated in the first heat exchanger. When the solution exits the reactor, the hot treated mixture is divided into two hot stream fragments. The first hot treated mixture stream fragment, the flow rate of which is kept constant by a diaphragm column, is used for controlling the temperature of the first heat exchanger and then discharged after being used in the first heat exchanger. The second hot treated mixture stream fragment is directly cooled and discharged when the second hot treated mixture stream fragment leaves the reactor.

Abstract: A method and device for the wet oxidation treatment of liquid waste laden with mineral matter in suspension. The device comprises a reactor including a treatment column, first and second heat exchangers placed upstream and downstream, respectively, of the reactor. The solution to be treated, laden with mineral matter to which an oxidizing gas has been added, is injected into the reactor for treatment after being preheated in the first heat exchanger. When the solution exits the reactor, the hot treated mixture is divided into two hot stream fragments. The first hot treated mixture stream fragment, the flow rate of which is kept constant by a diaphragm column, is used for controlling the temperature of the first heat exchanger and then discharged after being used in the first heat exchanger. The second hot treated mixture stream fragment is directly cooled and discharged when the second hot treated mixture stream fragment leaves the reactor.