Comparison and Screening of Culture Mediums of Yeast Strains for High-Temperature Fermentation

Liquor-Making Science and Technology - - CONFERENCES·NEWS -

WANG Fangfang1, DU Fengguang1, LIU Yue1, XU Linghe1,JIANG Chao1, MA Huanxin1,ZHENG Bin1 and ZHANG Caiying2 (1.Tianguan Group Co. Ltd., Nanyang, Henan 473000; 2. School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan 473000,China) Abstract: In this study, the substitute of culture mediums of yeast strains was explored. The fermentation contrast experiment was performed at 38 ℃ of yeast strains cultured by corn mash, corn filtrate, and traditional wort respectively. The results suggested that there was significant difference in alcohol content fermented by yeast strains cultured by mediums of different concentration. For example, while the ratio of corn and water was 1∶2, alcohol content of fermenting broth by yeast strains cultured by corn mash was 1 % vol higher than that cultured by wort. Meanwhile, contrast experiment of different yeast strains cultured by the same culture mediums was performed. The results suggested that corn mash was a better choice. Compared with wort culture mediums, the price of corn culture mediums was evidently lower. Key words: yeast; wort; corn mash; corn filtrate; high temperature fermentation

在当前石油问题日益严峻及大气污染日趋严重的形势下,乙醇作为可持续的清洁燃料倍受青睐。发酵法生产乙醇技术逐渐成熟,生产工艺更是向着

[1]无污染、零排放的环保目标不断改进 。酒精属于绿色产品,酒精的生产工艺也正在向着绿色、环保、节能的方向迈进。酵母菌的高温发酵不仅能够解决夏季部分地区因为温度太高导致酵母菌无法正常

[ 4]发酵的问题,还可以节约大量冷却水的使用2- 。目前,人们正采用不同的手段,从不同的角度来改进

[ 6]酒精酵母的生产性能,并取得了一定的进展5- 。

菌种种子培养基的选用是菌种能够正常生长和良好发酵的前提。培养基的选用原则是在满足菌体的生长和发酵需求的基础上,力求经济节约,也是微生物发酵进行工业化生产时需要进行考量

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