Approach to membrane filtration from the perspective of cake and blocking filtration laws

Prof. Eiji Iritani, Nagoya University, Japan

Membrane filtration processes play an increasingly important and indispensable role in widely diversified fields ranging from industry to environmental protection. In membrane filtration of colloids, membrane fouling is a critical problem leading to the degradation of filtration performance and causes a dramatic flux decline during the process due to a significant increase in the filtration resistance. Among several factors affecting membrane fouling, the talk focusses particularly on both the cake formation caused by the particle deposition and membrane pore blocking.

The theory of cake filtration in which the filter cake forms on the surface of filter medium has been applied by a number of researchers to examine the flux decline behaviors during classical liquid filtration. The theory for the highly compressible filter cake, as referred to as the modern filtration theory, is quite beneficial in the analysis of membrane filtration behaviors. A sophisticated method is presented for simultaneously and accurately evaluating pressure dependences of both the average specific resistance and average porosity of the filter cake formed in unstirred dead-end filtration by a step-up pressure filtration test conducted by using a filter with a single-stage reduction in the effective filtration area....

Session: K3 - Keynote Lecture III
Day: 11 October 2016
Time: 16:45 - 18:00 h