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The main disadvantage of crossflow microfiltration processes is the occurrence of fouling, which impedes its application and economic efficiency. Unsteady crossflow, e.g., due to pulsatile or alternating operating mode, can reduce the formation of a deposit layer and therefore prevent strong flux decay and retention of solutes. With this technique, especially processes run at low crossflow velocity or high transmembrane pressure can be significantly improved. The degree of improvement also largely depends on the fouling propensity of the fluid to be filtered. [ABSTRACT FROM AUTHOR]

The wet classification of particles < 10 μm is a complex process that has been researched for many years. In this study, the usage of a modified cross‐flow filtration process as a classification process was investigated. With this process, particles in a fine micrometer range can be separated from suspensions. The upper particle size is dependent on hydrodynamic forces. The experimental results were compared with different hydrodynamic force models to predict upper size. The influence of the permeate flux and the particle concentration in the feed on the upper particle size is studied. [ABSTRACT FROM AUTHOR]