Chapter Two

Dynamic Filtration with Rotating Disks, and Rotating or Vibrating Membranes

Luhui Ding, Michel Y. Jaffrin,  and Jianquan Luo     Technological University of Compiegne, Compiegne Cedex, France


This article describes various systems of dynamic filtration, also called shear-enhanced filtration, which consists in creating high shear rates at the membrane by a rotating disk, or by rotating or vibrating the membranes. This mode of operation permits to reach shear rates of the order of 1–3·105/s or almost one order of magnitude larger than in crossflow filtration and to increase both permeate flux and membrane selectivity. Its advantages and drawbacks relatively to crossflow modules are presented in the introduction. ...

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