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Physiological state of reused brewing yeast

Author

Listed:
  • Edyta Kordialik-Bogacka

    (Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Lodz, Poland)

  • Anna Diowksz

    (Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Lodz, Poland)

Abstract

In brewing, yeast may be reused many times. A number of yeast repitchings differs significantly among the breweries. Adjusting the number of times a strain may be serially repitched is of great importance for quality and consistency of final products. The fermentative and physiological characteristics of the yeast culture used in successive laboratory scale fermentations were determined. Yeast physiological state was assessed by the measurement of the levels of intracellular carbohydrates. In our investigation there were not any detectable changes in yeast capacity to ferment. No significant variation in the production of flavour compounds was found either. However, intracellular glycogen and trehalose contents were dependant on the yeast strain, generation number and wort gravity. Nevertheless, an alteration in the yeast physiological condition during serial repitchings occurred in a different mode than in previous studies confirming that the impact of serial repitchings is strain and medium dependent to a large extent.

Suggested Citation

  • Edyta Kordialik-Bogacka & Anna Diowksz, 2013. "Physiological state of reused brewing yeast," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 31(3), pages 264-269.
    • Handle: RePEc:caa:jnlcjf:v:31:y:2013:i:3:id:84-2012-cjfs
    DOI: 10.17221/84/2012-CJFS
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    Cited by:

    1. Krzysztof Kucharczyk & Tadeusz Tuszyński & Krzysztof Żyła & Czesław Puchalski, 2020. "The effect of yeast generations on fermentation, maturation and volatile compounds of beer," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 38(3), pages 144-150.

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