Skip to main content
Journal cover image

Particle back-transport and permeate flux behavior in crossflow membrane filters

Publication ,  Journal Article
Chellam, S; Wiesner, MR
Published in: Environmental Science and Technology
March 1, 1997

Particle residence time distributions in a membrane channel are interpreted to elucidate mechanisms of particle transport end colloidal fouling in membrane filtration. A comparison of particle size distributions in the membrane feed suspensions and deposited cakes provides evidence for selective particle transport and accumulation on membranes. These data support a previously hypothesized minimum in particle back-transport from the membrane as a function of particle size. The back-transport of smaller particles is apparently due to Brownian diffusion, while larger macrocolloids are controlled by an orthokinetic mechanism such as shear-induced diffusion. In all cases, cake specific resistances measured in the dead-end mode were higher than those of the corresponding feed suspensions. Also, cake specific resistances measured under a crossflow were higher than those in the dead- end mode. Further, the specific resistance of particle deposits on membranes increased with sheer rate and decreased as the initial permeation rate increased, suggesting that cake morphology is an important parameter in determining permeate flux. Thus, the effects of hydrodymamics on cake resistance needs to be established before a comprehensive model for crossflow filtration can be derived.

Duke Scholars

Published In

Environmental Science and Technology

DOI

ISSN

0013-936X

Publication Date

March 1, 1997

Volume

31

Issue

3

Start / End Page

819 / 824

Related Subject Headings

  • Environmental Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Chellam, S., & Wiesner, M. R. (1997). Particle back-transport and permeate flux behavior in crossflow membrane filters. Environmental Science and Technology, 31(3), 819–824. https://doi.org/10.1021/es9605228
Chellam, S., and M. R. Wiesner. “Particle back-transport and permeate flux behavior in crossflow membrane filters.” Environmental Science and Technology 31, no. 3 (March 1, 1997): 819–24. https://doi.org/10.1021/es9605228.
Chellam S, Wiesner MR. Particle back-transport and permeate flux behavior in crossflow membrane filters. Environmental Science and Technology. 1997 Mar 1;31(3):819–24.
Chellam, S., and M. R. Wiesner. “Particle back-transport and permeate flux behavior in crossflow membrane filters.” Environmental Science and Technology, vol. 31, no. 3, Mar. 1997, pp. 819–24. Scopus, doi:10.1021/es9605228.
Chellam S, Wiesner MR. Particle back-transport and permeate flux behavior in crossflow membrane filters. Environmental Science and Technology. 1997 Mar 1;31(3):819–824.
Journal cover image

Published In

Environmental Science and Technology

DOI

ISSN

0013-936X

Publication Date

March 1, 1997

Volume

31

Issue

3

Start / End Page

819 / 824

Related Subject Headings

  • Environmental Sciences