APPROACH FROM PHYSICOCHEMICAL ASPECTS IN MEMBRANE FILTRATION

In membrane filtration, solution environment factors such as pH and so lvent density are important in controlling the filtration rate and the rejection of the particles and/or the macromolecules. The filtration rate and the rejection in membrane filtration have been investigated f rom physicochemical aspects. It was shown that the properties of the f ilter cake formed on the membrane surface play a vital role in determi ning the filtration rate in membrane filtration. It was clearly demons trated that such filtration behaviors as the filtration rate and the r ejection are highly dependent on the electrical nature of the particle s and/or the macromolecules. Furthermore, it was shown that the solven t density rho has a large effect on the steady filtration rate in upwa rd ultrafiltration.