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KMID : 0380020190340010025
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Korean Journal of Biotechnology and Bioengineering
2019 Volume.34 No. 1 p.25 ~ p.30
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Isolation of a New Yeast Strain Producing Erythritol
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Ye Su-Ji
Park Hee-Young
Kwak Yu-Ri
Jeong Deok-Yeol
Kim Soo-Rin
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Abstract
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Erythritol, a four-carbon polyol, is recently noted as promising sugar alternatives. Several yeast strains such as Candida magnoliae, Yarrowia lipolytica, and Pseudozyma tsukubaensis have been known as erythritol producers. We recently isolated a yeast strain from domestic fruit samples, and noticed that this strain can also produce erythritol. Thus, the aim of this study is to optimize fermentation conditions of the isolated yeast to maximize erythritol production. Specifically, fermentations were conducted under different temperatures, aeration conditions, glucose concentrations and with different types of reducing agents. Next, we tried to scale-up the erythritol production using a bioreactor. In comparison to other known erythritol-producing strains as control, the newly isolated yeast strain showed the greatest potential to be used as an industrial erythritol producer.
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KEYWORD
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erythritol, sugar alcohol, sugar alternative, Candida spp., fermentation, scale-up
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