Discoloration of charged models wastewater with reactive and dispersed dyes by the combined process of coagulation-ultrafiltration

The discoloration of models wastewater loaded with dyes from textile finishing industry by physicochemical processes of coagulation-ultrafiltration (co-uf) in combined system was performed in the present work,exploiting two families' different dyes. the first family was reactive azo type is red cibacron 3 (rc3) and the second was dispersed type antraquinonique which is dispersed blue 7 (bd7). during the coagulation,we used the emulsion of lime (ca(oh)2) as a coagulating agent at a concentration of 800 mg/l and the asymmetric membrane based on polysulphone psu udel p1700 as selective barrier in the case of ultrafiltration. the effect of ph on the bleaching performance was studied by adjusting their values by acetic acid and sodium hydroxide. when discoloration made by the co-uf,the results of discoloration obtained from effluents loaded by red cibacron 3 and dispersed blue 7 were respectively recorded in the values 97.43 % and 100 % at the optimum ph equal to 12. according to the proposed study,it shows that the ph has a significant effect on the discoloration of colored water loaded with reactive and disperses dyes,on the one hand,and on the other hand,the combined process of coagulation-ultrafiltration has also improved the performance of their discoloration. © 2017,university of mohammed premier oujda morocco.