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Diafiltration process on xylo-oligosaccharides syrup using nanofiltration and its modelling

Authors

  • Hefei Zhao,

    1.  Department of Food Science and Technology, School of Biotechnology; The R&D Center of Separation and Extraction Technology in Fermentation Industry, East China University of Science and Technology, 200237 Shanghai, China
    2.  Shanghai Qiyu Bio-technique Co., Ltd., 200235 Shanghai, China
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    • Joint first authors, who contributed equally to this work.

  • Xiao Hua,

    1.  State Key Laboratory of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
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    • Joint first authors, who contributed equally to this work.

  • Ruijin Yang,

    Corresponding author
    1.  School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
      Fax: +86 510 85919150;
      e-mail: yrj@jiangnan.edu.cn
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  • Liming Zhao,

    1.  Department of Food Science and Technology, School of Biotechnology; The R&D Center of Separation and Extraction Technology in Fermentation Industry, East China University of Science and Technology, 200237 Shanghai, China
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  • Wei Zhao,

    1.  School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
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  • Zhong Zhang

    1.  School of Food Science and Technology, Jiangnan University, 214122 Wuxi, China
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Fax: +86 510 85919150;
e-mail: yrj@jiangnan.edu.cn

Summary

This work presents a theoretical study of the diafiltration and concentration processes on xylo-oligosaccharides (XOs) syrup using nanofiltration (NF). In our previous study of the separation performance of the NF process on XOs syrup, the models of flux (Jv) and observed retention (Robs) of an NF membrane have been established. In the present study, these models were employed to construct the balance equations of syrup volume and XOs concentration in a feed tank. In experiments, the constant-volume continuous diafiltration (CVCD) and the discontinuous diafiltration processes were implemented. In CVCD simulation, the flux curve predicted by the model agreed well with the experimental data. In discontinuous diafiltration simulation, the calculated total content of XOs was 94.5%, which was about 1.5% less than the experimental result (96.11%) given by discontinuous diafiltration operation on a XOs syrup with initial XOs content 83.5%.

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