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Modeling of poly(3-hydroxybutyrate) production by high cell density fed-batch culture of Ralstonia eutropha

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Abstract

High cell density culturing has been conducted for the production of poly(3-hydroxybutyrate) fed-batch cultures ofRalstonia eutropha with phosphate limitation. It was found that a high glucose concentration inhibited the synthesis of P(3HB) in the high cell density culture ofR. eutropha. Although a low glucose concentration can trigger the synthesis of P(3HB) in a manner similar to that of phosphate limitation, it also limited both the P(3HB) synthesis and the cell growth, and led to a low P(3HB) productivity because glucose is the sole carbon source in this reaction. An unstructured model was proposed for predicting the cell growth and P(3HB) synthesis in high cell density cultures ofR. eutropha, where the phosphate concentration played a key role in the accumulation of P(3HB) and in cell growth. Good agreements were found between the experimental data and model predictions. The results of simulation showed that the final P(3HB) concentration would decrease more than 25% when the glucose was concentration increased to 40 g/L, and indicated that the optimal glucose concentration for P(3HB) production by high cell density cultures ofR. eutropha was around 9 g/L.

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Authors and Affiliations

  1. College of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, 315100, Ningbo, P. R. China

    Longan Shang

  2. Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 305-701, Daejeon, Korea

    Longan Shang, Moon Il Kim, Jin-dal-rae Choi & Ho Nam Chang

  3. Department of Chemical Engineering, Northwest University, 710069, Xian, P. R. China

    Dai Di Fan

Authors
  1. Longan Shang
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  2. Dai Di Fan
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  3. Moon Il Kim
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  4. Jin-dal-rae Choi
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  5. Ho Nam Chang
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Correspondence to Ho Nam Chang.

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Shang, L., Fan, D.D., Kim, M.I. et al. Modeling of poly(3-hydroxybutyrate) production by high cell density fed-batch culture of Ralstonia eutropha . Biotechnol. Bioprocess Eng. 12, 417–423 (2007). https://doi.org/10.1007/BF02931065

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  • DOI: https://doi.org/10.1007/BF02931065

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