Method for wet oxidation of effluents heated essentially by...

C - Chemistry – Metallurgy – 02 – F

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C02F 11/08 (2006.01) C02F 1/06 (2006.01) C02F 1/72 (2006.01)

Patent

CA 2646181

The invention concerns a method for aqueous phase oxidation of effluents which consists in subjecting said effluents to oxidation in the presence of at least one oxidizing agent, at a temperature ranging between about 20°C and about 350°C, under pressure ranging between about 1 bar and about 160 bar, so as to mineralize part of the organic matter and in oxidizing total ammonia nitrogen contained in said effluents, said oxidation being performed inside a phase-separated reactor wherein a gas phase is arranged above the liquid phase constituted by the effluents, said method including at least one step of heating said effluents. The invention is characterized in that said heating step is essentially performed inside said reactor by the heat of the reaction oxidizing the organic matter, said heating step being preceded by a step of concentrating said effluents.

Procédé d'oxydation en phase aqueuse d'effluents consistant à faire subir auxdits effluents une oxydation en présence d'au moins un agent oxydant, à une température comprise entre environ 20°C et environ 350°C, sous une pression comprise entre environ 1 bar et environ 160 bar, de façon à minéraliser une partie de la matière organique et à oxyder l'azote ammoniacal et total contenu dans lesdits effluents, ladite oxydation étant menée à l'intérieur d'un réacteur à séparation de phases dans lequel une phase gazeuse est ménagée au-dessus de la phase liquide constituée par lesdits effluents, ledit procédé comprenant au moins une étape de chauffage desdits effluents, caractérisé en ce que ladite étape de chauffage est essentiellement réalisée au sein dudit réacteur par la chaleur de réaction d'oxydation de la matière organique, ladite étape de chauffage étant précédée d'une étape de concentration desdits effluents.

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