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Biotechnology and bioprocess engineering v.10 no.1, 2005년, pp.23 - 28   피인용횟수: 2

Optimum Conditions for the Biological Production of Lactic Acid by a Newly Isolated Lactic Acid Bacterium, Lactobacillus sp. RKY2

Wee Young-Jung    (School of Biological Sciences and Technology, Chonnam National University   ); Kim Jin-Nam    (Department of Material Chemical and Biochemical Engineering, Chonnam National University   ); Yun Jong-Sun    (BioHelix, Biotechnology Industrialization Center   ); Ryu Hwa-Won    (School of Biological Sciences and Technology, Chonnam National University  );
  • 초록

    Lactic acid is a green chemical that can be used as a raw material for biodegradable polymer. To produce lactic acid through microbial fermentation, we previously screened a novel lactic acid bacterium. In this work, we optimized lactic acid fermentation using a newly isolated and homofermentative lactic acid bacterium. The optimum medium components were found to be glucose, yeast extract, $(NH_4)_{2}HPO_4,\;and\;MnSO_4$ . The optimum pH and temperature for a batch culture of Lactobacillus sp. RKY2 was found to be 6.0 and $36^{\circ}C$ , respectively. Under the optimized culture conditions, the maximum lactic acid concentration (153.9 g/L) was obtained from 200 g/L of glucose and 15 g/L of yeast extract, and maximum lactic acid productivity ( $6.21\;gL^{-1}h^{-1}$ ) was obtained from 100 g/L of glucose and 20 g/L of yeast extract. In all cases, the lactic acid yields were found to be above 0.91 g/g. This article provides the optimized conditions for a batch culture of Lactobacillus sp. RKY2, which resulted in highest productivity of lactic acid.


  • 주제어

    batch fermentation .   culture conditions .   homofermentation .   lactic acid .   Lactobacillus.  

  • 참고문헌 (26)

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  • 이 논문을 인용한 문헌 (2)

    1. 2007. "" Biotechnology and bioprocess engineering, 12(3): 222~227     
    2. 2007. "" Biotechnology and bioprocess engineering, 12(6): 707~712     

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