Studies on secondary layer formation and its characterization during cross-flow filtration of microbial cells

The formation of membrane sublayers during cross-flow filtration was studied with a standardized E. coli suspension both in a tubular and a flat channel module with different membrane materials. The height of the layers was calculated for different experimental conditions. Transmembrane pressure, cr...

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Bibliographic Details
Published in:Journal of membrane science 1987-12, Vol.34 (3), p.245-266
Main Authors: Riesmeier, B., Kroner, K.H., Kula, M.-R.
Format: Article
Language:English
Subjects:
Applied sciences
Escherichia coli
Exact sciences and technology
hydrodynamics
Other techniques and industries
process engineering
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Summary:The formation of membrane sublayers during cross-flow filtration was studied with a standardized E. coli suspension both in a tubular and a flat channel module with different membrane materials. The height of the layers was calculated for different experimental conditions. Transmembrane pressure, cross-flow velocity, compressibility of the suspended particles, properties of the suspension, particle size and concentration were all found to have a significant effect on the formation of membrane sublayers. A decrease of the layer thickness and corresponding filtration resistance with increasing channel length was observed due to the longitudal transmembrane pressure gradient. The filtration resistance of the layer is found to be the dominant factor determining the flux rate.
ISSN:0376-7388
1873-3123
DOI:10.1016/S0376-7388(00)83167-1