Influence of strain and medium composition on filtration of escherichia coli suspensions

B. H. Junker, S. Timberlake, F. J. Bailey, J. Reddy, R. Prud'homme, K. Gbewonyo

Research output: Contribution to journalLetter

3 Scopus citations

Abstract

Cross‐flow filtration of Escherichia coli strains was examined at the laboratory and pilot scales using Romicon 500,000 molecular‐weight‐cutoff hollow fiber membranes. Both the series resistance and macrosolute polarization models were employed to compare performances. Total dissolved solids content above 90 g/L and viscosity above 1.1 × 10−3 paċ s of cell‐free culture media were found to decrease average filtration fluxes by over 60% both in the absence and presence of cells. Broth filtration with culture media of dissolved solids levels below 80 g/L were influenced to a greater extent by harvest cell density. The collodial nature of the complex nutrient responsible for the total solids increase affected prediction of filtration performance. Differences in strain filterability were observed with JM109 preferred over DH5 in high solids‐containing media and RR1 preferred over JM109 in low dissolved solids‐containing media. Their research demonstrates the importance of cell strain and media selection in the performance of early downstream processing steps. © 1994 John Wiley & Sons, Inc.

Original languageEnglish (US)
Pages (from-to)539-548
Number of pages10
JournalBiotechnology and Bioengineering
Volume44
Issue number4
DOIs
StatePublished - Aug 5 1994

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

Keywords

  • Escherichia coli
  • cell harvesting
  • cross‐flow filtration
  • fermentation

Fingerprint Dive into the research topics of 'Influence of strain and medium composition on filtration of escherichia coli suspensions'. Together they form a unique fingerprint.

Cite this