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Related Experiment Videos

Particle stress in bioreactors.

H J Henzler1

  • 1Bayer AG, Process Development/Bioprocess Engineering, Wuppertal, Germany. hans-juergen.henzler.hh@bayer-ag.de

Advances in Biochemical Engineering/Biotechnology
|June 17, 2000
PubMed
Summary

Low shear stress is vital for biological processes like fermentation and bioconversion. This study analyzes hydrodynamic stress in various bioreactors to aid in selecting optimal equipment for sensitive cells and enzymes.

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Area of Science:

  • Biotechnology
  • Biochemical Engineering
  • Fluid Dynamics

Background:

  • Optimal performance in cell fermentation, microorganism cultivation, and enzyme bioconversion relies on minimizing shear stress.
  • Understanding particle stress is essential for designing and selecting appropriate bioreactors.

Purpose of the Study:

  • To investigate the hydrodynamic principles governing particle stress in common bioreactor types.
  • To provide data for calculating and comparing shear stress across different reactor designs.

Main Methods:

  • Analysis of hydrodynamic principles in stirred tanks, boundary-layer flow reactors, shake flasks, viscosimeters, bubble columns, and gas-operated loop reactors.
  • Systematic investigation of hydrodynamic stress on particles within these systems.

Main Results:

  • Quantification of hydrodynamic stress experienced by particles in various bioreactor configurations.
  • Established relationships between reactor design, operating conditions, and particle stress levels.

Conclusions:

  • Findings enable fundamental conclusions regarding particle stress in biological systems.
  • Provides a basis for selecting and dimensioning bioreactors based on the critical criterion of particle stress.

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