Treatment of C-stage and E-stage bleaching plant effluent by ultrafiltration

The influence of pH on membranes of different materials and different cut off has been studied. One ceramic microfiltration membrane and three synthetic ultrafiltration membranes were included in the study. The pH of an acidic (C-stage) and and alkaline (E-stage) bleaching effluent was varied. For the E-stage effluent the membrane performance seemed to be correlated to the cut off of the membrane. During treatment of the C-stage effluent the performance of the membranes was more disparate