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Using fed-batch fermentation in very high gravity brewing: Effects of tween 80 and ergosterol supplementation on fermentation performance of immobilized yeast in calcium alginate gel

Pham T.N.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. | Doan N.H.D. |

International Food Research Journal Số 4, năm 2010 (Tập 17, trang 995-1002)

ISSN: 19854668

ISSN: 19854668


Tài liệu thuộc danh mục: Scopus



Từ khóa: Saccharomyces cerevisiae
Tóm tắt tiếng anh
In very high gravity brewing, fed-batch fermentation was carried out with Saccharomyces cerevisiae immobilized in calcium alginate gel. The specific gravity of initial wort and feeding medium originated from 55% malt and 45% maltose syrup adjunct was adjusted to 28�Brix and 41�Bx, respectively. The effect of supplementation of mixture of Tween 80 and ergosterol to the initial wort or to the feeding medium was examined. The results indicated that addition of 0.3% (v/v) Tween 80 and 24ppm ergosterol to the initial wort improved the fermentation performance of the immobilized yeast. Under these conditions, the primary fermentation time reduced 24h and the ethanol concentration was similar in comparison with those of the fed- batch culture without the supplementation. � 2008 IFRJ.

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