Applied Microbiology and Biotechnology

, Volume 41, Issue 6, pp 658–663

An automated monitoring system using on-line ultrafiltration and column liquid chromatography for Aspergillus niger fermentations

  • N. C. van de Merbel
  • G. J. G. Ruijter
  • H. Lingeman
  • U. A. Th. Brinkman
  • J. Visser
Biochemical Engineering Orginal Paper

DOI: 10.1007/BF00167281

Cite this article as:
van de Merbel, N.C., Ruijter, G.J.G., Lingeman, H. et al. Appl Microbiol Biotechnol (1994) 41: 658. doi:10.1007/BF00167281

Abstract

An automated system for the monitoring of fermentations of filamentous fungi is described. The system is based on the on-line combination of ultrafiltration, for the removal of cellular and macromolecular material from the fermentation broth. and column liquid chromatography for analysis of the filtrate. The performance of one hollow-fibre and two planar ultrafiltration modules is evaluated. The maximum sampling frequency as well as prevention from clogging by mycelium is strongly dependent on the construction of the module, best results being obtained with a planar membrane and a relative high flow rate (150 ml/min) of the broth through a single, wide-bore (3 mm) flow channel in the module. The method is used for the study of metabolic and regulatory processes of two different Aspergillus niger strains on multiple carbon sources. The selected system can be applied for at least 70 h without any negative effect on either the fermentation or the analytical system. Through an analysis frequency of once per hour detailed information regarding consumption and production of nine different compounds could be obtained.

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • N. C. van de Merbel
    • 1
  • G. J. G. Ruijter
    • 2
  • H. Lingeman
    • 1
  • U. A. Th. Brinkman
    • 1
  • J. Visser
    • 2
  1. 1.Department of Analytical ChemistryFree UniversityAmsterdamThe Netherlands
  2. 2.Department of GeneticsAgricultural UniversityWagenignenThe Netherlands