Method, devices and reagents for wastewater treatment

C - Chemistry – Metallurgy – 02 – F

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C02F 1/72 (2006.01) G01D 3/08 (2006.01)

Patent

CA 2536302

The invention relates to a method, devices and reagents which are used for Fenton reaction-based wastewater treatment. According to the invention, the oxidation reaction of the organic material with the oxygenated water is performed in the main oxidation reactor (12) in the presence of metallic catalysts. The Fenton reaction takes place in the reactor at absolute pressure of between 1 Kg/cm2 and 1.5 Kg/cm2 and at a temperature of between 110 °C and 120 °C. Once treated and cooled, the effluent is conveyed to zone D to a neutralising tank (6) in which the pH is increased to a value greater than seven, thereby causing precipitation of the hydroxides. In addition, safety checks are carried out automatically.

L'invention concerne un procédé, des équipements et des réactifs qui permettent de purifier des eaux résiduaires sur la base de la réaction de Fenton. La réaction d'oxydation de la matière organique avec l'eau oxygénée se produit dans le réacteur (12) principal d'oxydation, en présence de catalyseurs métalliques. La réaction de Fenton dans le réacteur se produit à une pression absolue comprise entre 1 Kg/cm?2¿ et 1,5 Kg/cm?2¿ et à une température comprise entre 110 ·C et 120 ·C. Une fois traité et refroidi, l'effluent est amené à la zone D, dans un réservoir (6) de neutralisation dans lequel le pH est augmenté de façon qu'il soit supérieur à 7, provoquant ainsi la précipitation des hydroxydes. Les contrôles de sécurité se font de façon automatique.

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