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Modelling the clarification of lactic acid fermentation broths by cross-flow microfiltration

Authors
Journal
Journal of Membrane Science
0376-7388
Publisher
Elsevier
Publication Date
Volume
186
Issue
2
Identifiers
DOI: 10.1016/s0376-7388(00)00677-3
Keywords
  • Cake Resistance
  • Adsorption Resistance
  • Concentration Polarisation
  • Critical Flux
  • Lactobacillus Delbrueckiispp.Lactisbacteria

Abstract

Abstract This work is focused on modelling microfiltration for clarifying fermentation broths for the production of lactic acid. The hydraulic resistance-in-series model was used with membrane resistance, bacterial cell cake resistance, adsorption resistance and solute concentration polarisation resistance. Most of the model parameters were determined from independent experiments. This model was applied for microfiltrations operated either under constant transmembrane pressure or under constant permeate flux. Resistances due to adsorption and to solute concentration polarisation dominated. Bacterial cake resistance was found to be very low or equal to zero when microfiltration was below the critical flux.

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