Elsevier Science Publishers

are directed towards the study of Important research efforts the concentration polarisation in pressure-driven membrane processes at the upstream solution-membrane interface. Seldom, solute adsorption or retention are mentioned at the downstream for dialysis processes. permeate-membrane interface, except powever, of membrane processes are more and more applications concerned with liquid streams at both sides of the membrane : macrosolute-microsolute separations,... diafiltration, bioreactors, In the present paper, emphasis is given on the improvement of permeate flux at the downstream permeate-membrane interface. A colloid suspension-microsolute (salt) mixture is separated and desalting is improved by circulating a washing solvent at the Experimental results are given downstream side of the membrane. showing the influence of the forced stream on the whole permeate flux.