Food and Fermentation Industries >

2023 , Vol. 49 >Issue 16: 112 - 118

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.031224

Purification of Dendrobium officinale polysaccharides using ultrafiltration combined with electrodialysis technology

  • QIAN Peiyu ,
  • LI Yuanlele ,
  • FENG Simin ,
  • CHEN Bilian ,
  • SHAO Ping
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  • 1(College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310000, China)
    2(China Key Laboratory of Food Macromolecular Resources Processing Technology for Light Industry (Zhejiang University of Technology), Hangzhou 310000, China)
    3(Zhejiang Institute of Food and Drug Inspection, Hangzhou 310051, China)

Received date: 2022-02-21

  Revised date: 2022-05-24

  Online published: 2023-09-12

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Abstract

In this study, a novel process coupling two-step ultrafiltration (UF) and electrodialysis (ED) was developed to produce high-purity Dendrobium officinale polysaccharides. In the UF-1st process, 0.5 mol/L NaCl was introduced to increase the extraction rate of polysaccharides. Afterwards, the ED process was employed to remove NaCl and heavy metal ions from the extraction. The high-purity Dendrobium officinale polysaccharides were obtained after removing small-molecule impurities such as monosaccharides and oligosaccharides through the UF-2nd process. The operation parameters of the UF and ED processes were optimized in the present study. When the temperature and pH of the feed fluid were at 35 ℃ and 6, the optimal recovery (78.2%) and purity (86.4%) of polysaccharides were achieved. When the voltage and ED time were set at 15 V and 30 min, the removal rate of lead, copper, and mercury reached 95.8%, 26.8%, and 73.3%, respectively.

Key words： Dendrobium officinale polysaccharides; ultrafiltration; salt ion; electrodialysis; heavy metal removal

Cite this article

QIAN Peiyu , LI Yuanlele , FENG Simin , CHEN Bilian , SHAO Ping . Purification of Dendrobium officinale polysaccharides using ultrafiltration combined with electrodialysis technology[J]. Food and Fermentation Industries, 2023 , 49(16) : 112 -118 . DOI: 10.13995/j.cnki.11-1802/ts.031224

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