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Using fed-batch fermentation in high-gravity brewing: Effects of nutritional supplementation on yeast fermentation performance

Vu T.K.L. Department of Food Technology, Ho Chi Minh City University of Technology, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Viet Nam|
Le V.V.M. |

International Food Research Journal Số 1, năm 2010 (Tập 17, trang 117-126)

ISSN: 19854668

ISSN: 19854668


Tài liệu thuộc danh mục: Scopus



Từ khóa: Saccharomyces cerevisiae
Tóm tắt tiếng anh
To intensify the brewing process and increase the fermenter productivity, many breweries throughout the world have been embracing high-gravity brewing. However, increasing original wort concentration can cause a negative effect on yeast fermentation performance. This study focused on the application of fed-batch fermentation in high-gravity brewing. High gravity worts of 24�Bx (using 30% high maltose syrup adjunct) supplemented with yeast extract or mixture of yeast extract and Tween 80 were used as feeding-media in fed-batch cultures. As a results, the nutrients supplemented to feeding media improved the yeast fermentation performance. Especially, the supplementation of 0.25% (w/v) yeast extract and 0.8% (v/v) Tween 80 to the feeding-medium not only reduced the primary fermentation time, but also increased the ethanol concentration of the fed-batch culture in comparison with the fed-batch culture without this supplementation to the feeding-medium.

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