Microorganisms (Apr 2023)

Brewing a Craft Belgian-Style Pale Ale Using <i>Pichia kudriavzevii</i> 4A as a Starter Culture

  • Vogar Leonel Nieto-Sarabia,
  • Guiomar Melgar-Lalanne,
  • Christian Bryan Ballinas-Cesatti,
  • Fernando Abiram García-García,
  • Jorge Alberto Jose-Salazar,
  • César Mateo Flores-Ortiz,
  • Eliseo Cristiani-Urbina,
  • Liliana Morales-Barrera

DOI
https://doi.org/10.3390/microorganisms11040977
Journal volume & issue
Vol. 11, no. 4
p. 977

Abstract

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There is an expanding market for beer of different flavors. This study aimed to prepare a craft Belgian-style pale ale with a non-Saccharomyces yeast. Pichia kudriavzevii 4A was used as a sole starter culture, and malted barley as the only substrate. The ingredients and brewing process were carefully monitored to ensure the quality and innocuousness of the beverage. During fermentation, the yeast consumed 89.7% of total sugars and produced 13.8% v/v of ethanol. The product was fermented and then aged for 8 days, adjusted to 5% v/v alcohol, and analyzed. There were no traces of mycotoxins, lead, arsenic, methanol, or microbiological contamination that would compromise consumer health. According to the physicochemical analysis, the final ethanol concentration (5.2% v/v) and other characteristics complied with national and international guidelines. The ethyl acetate and isoamyl alcohol present are known to confer sweet and fruity flavors. The sensory test defined the beverage as refreshing and as having an apple and pear flavor, a banana aroma, and a good level of bitterness. The judges preferred it over a commercial reference sample of Belgian-style pale ale made from S. cerevisiae. Hence, P. kudriavzevii 4A has the potential for use in the beer industry.

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