Ozonation of wastewater for reduction of sludge or foam and...

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 3/12 (2006.01) C02F 1/78 (2006.01)

Patent

CA 2664683

A system and method for the ozone treatment of wastewater is disclosed. The disclosed wastewater treatment system (10) includes a high selectivity reactor (30) coupled to an activated sludge treatment basin (20). The high selectivity reactor (30) is adapted to receive a stream containing sludge diverted directly or indirectly from the activated sludge treatment basin (20). The disclosed wastewater treatment system and method is adapted to inject a chemical agent, such as ozone-enriched gas, into the diverted stream for treatment within the high selectivity reactor for purposes of sludge reduction, foam control, or bulking control. The treated stream is then returned to the activated sludge treatment basin.

L'invention concerne un système et un procédé de traitement des eaux usées à l'ozone. Ce système comprend un réacteur à haute sélectivité couplé à un bassin de traitement à boues activées. Ce réacteur à haute sélectivité est conçu pour recevoir un flux contenant des boues, dérivé directement ou indirectement du bassin de traitement à boues activées. Les système et procédé selon l'invention sont conçus pour injecter une substance chimique, telle qu'un gaz enrichi à l'ozone, dans le flux dérivé pour un traitement à l'intérieur du réacteur à haute sélectivité pour réduire les boues, réguler la mousse ou réguler le gonflement. Le flux traité est ensuite renvoyé vers le bassin de traitement à boues activées.

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