Modified Boundary Layer Resistance Model for Membrane Ultrafiltration

Tung-Wen Cheng; Jen-Guo Wu

doi:10.6180/jase.2001.4.2.05

Modified Boundary Layer Resistance Model for Membrane Ultrafiltration

Chemical Engineering

Tung-Wen Cheng¹ and Jen-Guo Wu¹

¹Department of Chemical Engineering Tamkang University Tamsui, Taipei 251, Taiwan, R.O.C.

Received: January 1, 2001
Accepted: June 22, 2001
Publication Date: June 22, 2001

Download Citation: ||https://doi.org/10.6180/jase.2001.4.2.05

ABSTRACT

The present modified boundary-layer resistance model (MBR model) includes the effect of osmotic pressure of the concentrated boundary layer on the flux. Ultrafiltration experiments were conducted in a hollow-fiber membrane module with dextran T500 aqueous solution as tested solution. The predict by the MBR model is better the osmotic pressure model or the boundary-layer resistance model and agrees pretty well with the experimental result. The overestimation of the present model is due to the neglect of the fouling resistance.

Keywords: Membrane Separation, Ultrafiltration, Boundary Layer Resistance, Osmotic Pressure

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