Two-stage subcritical-supercritical wet oxidation

Details Two-stage subcritical-supercritical wet oxidation Two-stage subcritical-supercritical wet oxidation

C - Chemistry, Metallurgy

02

F

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

Patent

CA 2095803

TWO STAGE SUBCRITICAL- SUPERCRITICAL WET OXIDATION ABSTRACT A two-stage wet oxidation process for COD removal from high strength wastewater is disclosed. The wastewater stream is treated in a first stage subcritical wet oxidation zone at temperatures between about 250° and 374°C to remove a substantial portion of the COD. Subsequently, all or a portion of the first stage oxidized waste stream is treated in a second stage supercritical wet oxidation zone at temperatures of 374° to about 600°C to remove any remaining COD content. Both stages of wet oxidation treatment are carried out at essentially the same system pressure.

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