Advanced control method for a membrane filtration unit, and...

B - Operations – Transporting – 01 – D

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B01D 61/18 (2006.01) B01D 61/20 (2006.01) B01D 61/22 (2006.01) B01D 65/08 (2006.01) C02F 1/44 (2006.01) C02F 1/52 (2006.01)

Patent

CA 2702681

Advanced control method for a membrane filtration unit, applied to the treatment of an effluent, employing microcoagulation on a membrane, which consists in injecting, upstream of the membrane, a dose of coagulation reactant(s) 30 to 80 times below the dose (X) making the zeta potential of the effluent zero, in which method: quantities defining the quality of the effluent to be treated and quantities defining the state of membrane clogging are measured as input variables; the operating point of the microcoagulation process is located on the basis of the results of the above measurements; thresholds for the input variables are determined, the microcoagulation having to be initiated when said thresholds are violated; and the coagulation reactant(s) is(are) injected depending on the results of the measurements and on the comparison of the input variables with the respective thresholds.

Procédé de gestion avancée d'une unité de filtration sur membrane, appliqué au traitement d'un effluent, mettant en oeuvre une microcoagulation sur membrane qui consiste à injecter en amont de la membrane une dose de réactif(s) de coagulation 30 à 80 fois inférieure à la dose (X) annulant le potentiel Zêta de l'effluent, selon lequel : on mesure, en tant que variables d'entrée, des grandeurs définissant la qualité de l'effluent à traiter et des grandeurs définissant l'état d'encrassement de la membrane; on situe le point de fonctionnement du procédé de microcoagulation à partir des résultats des mesures précédentes et on détermine des seuils pour les variables d'entrée dont le franchissement doit déclencher la microcoagulation et, selon les résultats des mesures et de la comparaison des variables d'entrée avec les seuils respectifs, on pilote l'injection du/des réactif(s) de coagulation.

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