Biotechnology and Bioprocess Engineering:BBE

  • 제7권6호
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  • Pages.357-361
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  • 2002
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  • 1226-8372(pISSN)
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  • 1976-3816(eISSN)
한국생물공학회 (The Korean Society for Biotechnology and Bioengineering)
권호 표지

Continuous Cultivation of Lactobacillus rhamnosus with Cell Recy-cling Using an Acoustic Cell Settler

  • Yang, Yun-Jeong (Department of Biological Engineering, ERC for Advanced Bioseparation Technology, Inha University) ;
  • Hwang, Sung-Ho (Department of Biological Engineering, ERC for Advanced Bioseparation Technology, Inha University) ;
  • Lee, Sang-Mok (Department of Biological Engineering, ERC for Advanced Bioseparation Technology, Inha University) ;
  • Kim, Young-Jun (Department of Biological Engineering, ERC for Advanced Bioseparation Technology, Inha University) ;
  • Koo, Yoon-Mo (Department of Biological Engineering, ERC for Advanced Bioseparation Technology, Inha University)
  • 발행 : 2002.12.01
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초록

Continuous production of lactic acid from glucose by Lactobacillus rhamnosus with cell recycling using an acoustic cell settler was carried out. The performance of the system, such as the concentration of cell and product were compared with the control experiment without recycling. The acoustic settler showed cell separation efficiency of 67% during the continuous operation and the cell concentration in the fermentor with recycle exceeded that of the control by 29%. Com-pared with the control, tactic acid production was increased by 40%, while glucose consumption was only increased by 8%. The higher value of lactic acid production to substrate consumption (Yp/s, product yield coefficient) achieved by cell recycling is interpreted to indicate that the recycled cell mass consumes less substrate to produce the same amount of product than the control Within system environmental changes due to the longer mean cell residence time induced the cells maintaining the metabolic pathways to produce Less by-Product but more product, lactic acid.

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