Rotating Membrane Filtration and Rotating Reverse Osmosis

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  • Lee Sangho
    Construction Environment Research, Korea Institute of Construction Technology
  • Lueptow Richard M.
    Department of Mechanical Engineering, Northwestern University

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説明

Rotating membrane filtration is a means of dynamic filtration that incorporates both high shear and flow instabilities to reduce membrane fouling. The device consists of a cylindrical membrane filter rotating within an outer cylindrical shell. The superior performance of rotating membrane filtration appears to be a consequence of the high shear in the annulus, which is enhanced by the redistribution of azimuthal momentum by the appearance of Taylor vortices in the annulus. The anti-fouling characteristics of rotating filtration can be utilized for reverse osmosis in addition to microfiltration. In this paper, we review the physics underlying rotating filtration, examine the anti-fouling mechanisms in rotating filtration, and describe recent efforts to apply rotating filtration to reverse osmosis.

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