Comparative study of the performance on asymmetric membranes ultrafiltration. Application to the bleaching of colored water with vat dyes

M. Berradi, O. Cherkaoui, A. El Harfi


In the present work, we have conducted a study which is to study the mechanical and hydrodynamic performance (permeability and selectivity) of two asymmetric ultrafiltration membranes, the base matrix is polysulfone PSU UDEL P1700 [1-3]. The first type of these membranes is composed only of polysulfone and the second type is made from polysulfone and polystyrene expanded (PSe) [2]. Both membranes were used in the bleaching of waste water loaded with vat dyes (indigo and sulfur black) by using the technical ultrafiltration (UF), while optimizing the hydrodynamic and mechanical conditions of harvested membranes [2, 4]. The results of this study have been shown that the selectivity and the permeability of the PSU/PSe membrane are more efficient with respect to those of the membrane completely comprised of PSU, on the one hand, and the measured values of the fading rate water loaded with the black sulfur dyes and indigo were recorded respectively at percentages 60.78% and 80.36% appropriate the membrane consisting of PSU only and at percentages 64.04% and 87.24% for the membrane composed of PSU/PSe, the other.The results of this study, we showed that adding PSe in very small quantities in the mixture of polysulfone only has increased mechanical and separative properties (permeability and selectivity) of the resulting membrane.



Performance; Ultrafiltration; Membrane; Polysulfone; Polystyrene expanded; Colored water; Vat dyes; Discoloration

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