Liquid effluent treatment process and plant

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 3/30 (2006.01) C02F 3/22 (2006.01) C02F 3/28 (2006.01)

Patent

CA 2323620

The invention relates to an effluent treatment process and to a plant for treating effluent. The plant comprises a pair of elongate vessels (5, 12), one vessel (12) being for aerobic and the other (5) being for anoxic metabolisation of effluent by microorganisms in the form of biomass-coated particles, each vessel having a downcomer zone (4, 11) and a riser zone (7, 14). The first riser zone (7) of the vessel (5) for anoxic metabolisation communicates with the downcomer zone (11) of the vessel (12) for aerobic metabolisation.

L'invention porte sur un procédé et sur un équipement de traitement d'un effluent. Cet équipement comprend une paire de cuves allongées (5, 12), l'une (12) étant prévue pour la métabolisation aérobique et l'autre (5) pour la métabolisation anoxique de l'effluent par des micro-organismes se présentant sous la forme de particules recouvertes d'une biomasse, chaque cuve comportant une zone de descente (4, 11) et une zone de montée (7, 14). La première zone de montée (7) de la cuve (5) prévue pour la métabolisation anoxique communique avec la zone de descente (11) de la cuve (12) prévue pour la métabolisation aérobique.

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