반복회분식 배양을 흉한 젖산생산에 관한 연구

  • 오후록 (전남대학교 화학공학부) ;
  • 위영중 (전남대학교 화학공학부) ;
  • 정선옥 (전남대학교 화학공학부) ;
  • 윤종선 (동신대학교 생물자원산업화지원센타) ;
  • 류화원 (전남대학교 화학공학부)
  • Published : 2001.11.07

Abstract

In this study a repeated batch production of lactic acid was investigated for the purpose of reducing amount of yeast extract dosage. First batch operation was performed with nutrient rich media(glucose 100-150 g/${\ell}$, and high yeast extract contents; 15 g/${\ell}$), and subsequential batch operations were performed with nutrient poor media(glucose 100-150 g/${\ell}$, and reduced yeast extract contents; 4-5 g/${\ell}$). Volumetric productivities(6.03-6.20 g/${\ell}{\cdot}h$) and substrate conversion rate(94-98%) of eve η subsequential batch operation were maintained with the same level of first batch operation(6.19 g/${\ell}{\cdot}h$, and 99%, respectively), when concentrations of glucose and yeast extract were 100, and 4 g/${\ell}$ respectively.

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