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Flocculation in brewing yeasts: a computer simulation study.

M Ginovart1, D López, A Giró

  • 1Departament de Matemàtica Aplicada III, Edifici ESAB, Universitat Politècnica de Catalunya, Campus del Baix Llobregat, Avda. Canal Olímpic, 08860-Castelldefels, Barcelona, Spain. marta.ginovart@upc.edu

Bio Systems
|October 20, 2005
PubMed
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A new yeast flocculation simulator, INDISIM-FLOC, evaluated two models. The cascade model showed better agreement with experimental data than the addition model.

Area of Science:

  • Microbiology
  • Biophysics
  • Computational Biology

Background:

  • Yeast flocculation is a crucial process in industrial biotechnology.
  • Understanding the mechanisms of yeast flocculation is essential for optimizing fermentation processes.
  • Existing models for yeast flocculation vary in their predictive capabilities.

Purpose of the Study:

  • To evaluate the predictive performance of two distinct yeast flocculation models: the addition model and the cascade model.
  • To compare the simulation outputs with available experimental data for qualitative agreement.

Main Methods:

  • Utilized INDISIM-FLOC, an individual-based simulator derived from INDISIM.
  • Simulated yeast flocculation using both the Calleja addition model and the Stratford cascade model.

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  • Assessed the qualitative agreement between simulation results and experimental observations.

    • Main Results:

    • The INDISIM-FLOC simulator was employed to test the predictions of both models.
    • The cascade model demonstrated a superior qualitative agreement with experimental data compared to the addition model.
    • This suggests the cascade model offers a more accurate representation of yeast flocculation dynamics.

    Conclusions:

    • The cascade model provides a better qualitative description of yeast flocculation.
    • INDISIM-FLOC is a valuable tool for assessing and comparing yeast flocculation models.
    • Further research may refine the cascade model for quantitative predictions.