Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Screening and ethanol Fermentation of Flecculent Saccharomyces cerevisiae CA-1

응집성 Saccharomyces cerevisiae CA-1의 분리와 에탄올 발효

  • 이용범 (중앙대학교 산업대학 식품가공학과) ;
  • 심상국 (동남보건전문대학 식품가공과) ;
  • 한면수 (중앙대학교 산업대학 식품가공학과) ;
  • 정동효 (중앙대학교 산업대학 식품가공학과)
  • Published : 1995.12.01
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Abstract

A flocculating sugar tolerant yeast strain was isolated from fermenting Takju. This strain was identified as Saccharomyces cerevisiae CA-1 according to the Lodder's yeast taxonomic studies. The isolated yeast could grow in 50% glucose and in 7% ethanol in the YPD medium. It's optimal growth temperature, initial pH, shaking rate and initial glucose concentration for ethanol fermentation showed 35$\circ$C, 4.5, 150 rpm, 15%, respectively. Ethanol concentration was 63 g/l in 20% glucose after 24 hours, fermentation yield was 0.49 g-ethanol/g-glucose in 10% glucose after 24 hours and ethanol productivity was 3.09 g/l$\cdot $h in 10% glucose after 12 hours in batch fermentation. Repeated batch fermentation was possible for over 50 days and ethanol yield, ethanol productivity and substrate conversion rate were 0.39-0.50 g/g, 1.63-2.08 g/l$\cdot $h and more than 99%, respectively during these periods.

Keywords

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