Optimization of Bioprocess for Production of Copper-Enriched Biomass of Industrially Important Microorganism Saccharomyces cerevisiae(MICROBIAL PHYSIOLOGY AND BIOTECHNOLOGY)

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The production of Saccharomyces cerevisiae cells enriched with copper and the effects of adding copper ions to different media on yeast cell growth and ethanol production were studied. In the media Cu^<2+> concentrations of up to 0.094 mM had no effect on alcoholic fermentation, whereas higher Cu^<2+> concentrations markedly decreased yeast cell growth rate and ethanol production. Under static conditions, the maximum amounts of copper uptake(Le., 1.16 mg/g, 1.2 mg/g and 0.81 mg/g dry matter yeast biomass for glucose, sucrose and molasses media, respectively) were obtained after 8 h of fermentation, whereas under dynamic conditions smaller amounts of copper uptake (i.e., 0.98 mg/g, 1.02 mg/g and 0.7 mg/g dry matter yeast biomass for glucose, sucrose and molasses media, resoectivelv) were obtained after 6 h of fermentation.
公益社団法人日本生物工学会の論文
2007-04-25