2006•Liquor-making Science & TechnologyRequires access
Study on the Optimization of Fermentation Technology of High-yield Alcohol Yeast Strain Co-158
Wei Zhang
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Abstract
The fermentation technology of high-yield alcohol yeast strain Co-158(produced by the mutagenesis of 60Co) were optimized and the best technical conditions in fermentation were determined by orthogonal test as follows: the ratio of raw materials and water was 1∶2,4.5 % inoculation quantity,84 h fermentation time,and initial pH value was 4.5.Besides,glucose addition techniques were optimized as follows: corn flour sweet mash used as ground substance,84 h fermentation time,addition of 6 % glucose at intermittent flow in fermentation,alcohol yield by triangle flask fermentation was 19.20 %(v/v) and the content of residual reducing sugar was 0.685 %,and alcohol yield by 10 L fermenting pot fermentation was 18.60 %(v/v) and the content of residual reducing sugar was 0.013 %.