Alcohol Fermentation by Zymomonas mobilis Part. 1. Effects of environmental conditions on the growth kinetics of Zymomonas mobilis

Zymomonas mobilis에 의한 알코올 발효 I. 발효 환경이 생육에 미치는 영향

  • Pack, MooYoung (Dept. of Biological Science and Engineering, KAIST) ;
  • Chun, Byong-ik (Dept. of Fermentation Technology, Kangweon National University)
  • 박무영 (한국과학원 생물공학과) ;
  • 천병익 (강원대학교 공과대학 발효공학과)
  • Published : 1983.10.31

Abstract

The effect of various environmental conditions on the growth kinetics of Zymomonas mobilis were studied and the kinetic parameters were evaluated. The value of ${\mu}m$ was $0.45hr^{-1}$ and Ks was 0.23 g/L. Inhibition of growth at high glucose concentration was found to follow the threshold substrate inhibition. Threshold substrate concentration was 102 g/L and substrate inhibition constant was 196 g/L. The effects of yeast extract concentrations were found to follow the Monod equation. ${\mu}m$ value was $0.45hr^{-1}$ and Ks was 0.3 g/L at 20 g/L of glucose and $0.24hr^{-1}$ and 0.24 g/L respectively at 200 g/L of glucose. The optimum temperature was found to be $35^{\circ}C$ and the activation energy of growth was 7.7 Kcal/mole below $35^{\circ}C$ and -29 Kcal/mole above $35^{\circ}C$.

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