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Fed-batch system for propagation of brewer’s yeast

Donnelly, Dan orcid logoORCID: 0000-0002-8150-7019, Blanchard, Lucien, Dabros, Michal orcid logoORCID: 0000-0002-0176-0015, O'Hara, Seamus, Foley, Greg orcid logoORCID: 0000-0002-2284-4218, Freeland, Brian orcid logoORCID: 0000-0003-3705-5745 and Brabazon, Dermot orcid logoORCID: 0000-0003-3214-6381 (2021) Fed-batch system for propagation of brewer’s yeast. Journal of the American Society of Brewing Chemists, 80 (2). pp. 190-200. ISSN 0361-0470

Abstract
A novel high-density yeast propagation system has been developed, which produced yeast that performed as well as cropped yeast in commercial brewery trials. This process is capable of producing yeast concentrations 13 times greater than traditional yeast propagation approaches used in breweries to date. The system is based on a controlled fed-batch yeast fermentation, which can produce pitching yeast in as little as 24h. A demonstrator plant was installed in a regional brewery and yeast produced from the test-platform was used to pitch commercial brews. Plant-scale trials have shown that the yeast propagated using this new system had the same fermentation profile compared to control fermentations that used cropped yeast. Volatile analysis showed no significant difference between the control and experimental beers. The experimental beers tasted true-to-type and were released to trade. The new process allows for smaller pitching volumes while maintaining overall beer quality.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:Bioprocessing; brewing; distilling; fed-batch; propagation; yeast
Subjects:Biological Sciences > Biotechnology
Biological Sciences > Food technology
Biological Sciences > Microbiology
Engineering > Production engineering
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Biotechnology
Publisher:Taylor & Francis
Official URL:https://doi.org/10.1080/03610470.2021.1937471
Copyright Information:© 2021 The Authors. Open Access (CC-BY-4.0
Funders:Enterprise Ireland Innovation Voucher Number IV20183060, Carlow County Council, School of Biotechnology, Dublin City University.
ID Code:26072
Deposited On:22 Jul 2021 10:37 by Brian Freeland . Last Modified 21 Nov 2023 11:21
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