Fed-Batch System for Propagation of Brewer’s Yeast

IF 1.8 4区农林科学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of the American Society of Brewing Chemists Pub Date : 2021-07-19 DOI:10.1080/03610470.2021.1937471

D. Donnelly, L. Blanchard, M. Dabros, S. O'Hara, D. Brabazon, G. Foley, B. Freeland

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引用次数: 1

Abstract

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 24 h. 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.

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啤酒酵母补料分批繁殖系统

摘要开发了一种新的高密度酵母繁殖系统，该系统生产的酵母在商业啤酒厂试验中表现良好。该工艺能够产生比迄今为止啤酒厂使用的传统酵母繁殖方法高13倍的酵母浓度。该系统基于受控的补料分批酵母发酵，可在24小时内生产投球酵母 h.在一家地区啤酒厂安装了一个示范工厂，并使用测试平台生产的酵母来推销商业啤酒。植物规模的试验表明，与使用作物酵母的对照发酵相比，使用这种新系统繁殖的酵母具有相同的发酵特性。挥发性分析显示对照啤酒和实验啤酒之间没有显著差异。这些实验性啤酒味道纯正，并被允许交易。新工艺在保持啤酒整体质量的同时，可以减少灌装量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the American Society of Brewing Chemists 工程技术-生物工程与应用微生物

CiteScore

4.00

自引率

20.00%

发文量

审稿时长

3 months

期刊介绍： The Journal of the American Society of Brewing Chemists publishes scientific papers, review articles, and technical reports pertaining to the chemistry, microbiology, and technology of brewing and distilling, as well as the analytical techniques used in the malting, brewing, and distilling industries.