Method and device for scrubbing effluents liquids

Details Method and device for scrubbing effluents liquids Method and device for scrubbing effluents liquids

C - Chemistry, Metallurgy

02

F

C02F 1/72 (2006.01) C02F 1/70 (2006.01) C02F 1/00 (2006.01) C02F 1/24 (2006.01) C02F 1/467 (2006.01) C02F 1/74 (2006.01) C02F 1/78 (2006.01) C02F 3/06 (2006.01)

Patent

CA 2752732

The invention relates to a method and to a device for scrubbing liquid effluents laden with dissolved or undissolved organic and/or inorganic substances and continuously fed at a flow rate Df. After a preliminary effluent-floating operation if required, the method comprises carrying out at least one treatment cycle, the treatment cycle including a first step in which the effluents are subjected to an electrolytic treatment by circulation in a first compartment while generating a very strong turbulence, followed by a second step in which the undissolved elements contained in the effluents are agglomerated by coagulation/flocculation before circulating the effluents in a second free surface compartment, with the scraping of the sludge carried out at the upper portion, while bubbling and maintaining a reduced turbulence in said second compartment.

II s'agit d'un procédé et d'un dispositif d'épuration d'effluents liquides chargés de substances organiques et/ou minérales, dissoutes ou non, alimentées en continu à un débit Df. Après une opération préalable de flottation des effluents s'il y a lieu, on réalise au moins un cycle de traitement, le cycle de traitement comprenant une première étape dans laquelle on effectue un traitement électrolytique des effluents par circulation dans un premier compartiment en générant une très forte tarbulence, puis une deuxième étape dans laquelle on agglomère par coagulation/floculation les éléments non dissous contenus dans les effluents avant circulation de ces derniers dans un deuxième compartiment à surface libre, avec raclage des boues obtenues en partie supérieure, en bullant et en conservant une faible turbulence dans ledit deuxième compartiment.

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