Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (12): 1912-1919.DOI: 10.19894/j.issn.1000-0518.210535

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Study on Membrane Blocking in Lycium Barbarum Polysaccharide Ultrafiltration Membrane Bioreactor Based on COMSOL Software

Bo WANG1, Fang LUO1, Yan-Zhao SUN2(), Jing-Wen HU1, Jun-Miao LIU1   

  1. 1.School of Pharmacy Engineering,Zhejiang Pharmaceutical University,Ningbo 315100,China
    2.School of Automotive and Traffic Engineering & Hubei University of Arts and Science,Xiangyang 441053,China
  • Received:2021-11-15 Accepted:2022-09-21 Published:2022-12-01 Online:2022-12-13
  • Contact: Yan-Zhao SUN
  • About author:sunyanzhao888@163.com
  • Supported by:
    the General Scientific Research Project of Education Department of Zhejiang Province(Y202045027);the Natural Science Foundation of Ningbo City(2019A610371);the Universal-level Project of Zhejiang Medical College(2019011);the Science and Technology Innovation Program of College Students of Zhejiang Province(New Seedling Talent Program 2019R458004)

Abstract:

Lycium barbarum polysaccharide is refined based on polysulfone hollow fiber ultrafiltration membrane separation technology, and the lycium barbarum polysaccharide membrane blocking countercurrent extraction and ultrasonic equipment parameters are corrected by COMSOL software to obtain a better purification process. A microwave-ultrasonic method is used to extract Lycium barbarum polysaccharides, and polysulfone hollow fiber ultrafiltration membranes are used to separate Lycium barbarum polysaccharides. Single factor analysis and orthogonal experiments are used to investigate the important parameters in the extraction and separation process of Lycium barbarum polysaccharides. The important membrane blocking parameters are corrected by the COMSOL software. The optimal process conditions for the extraction of Lycium barbarum polysaccharides are: the extraction temperature between 50~70 ℃, ultrasonic power 50 W, solid-liquid ratio 1∶8~1∶12, and extraction time 40~60 min. When the ultrafiltration membrane relative molecular weight cut-off is 1×104, the membrane flux is better. The orthogonal experiment results show that the membrane flux has the largest relationship with the temperature of the feed liquid, followed by the membrane pH value and separation operating pressure. COMSOL software performs continuous countercurrent extraction equipment for Lycium barbarum polysaccharides and the calculations show that compared with fully enclosed blades, perforated blades can significantly reduce the solvent short-circuit phenomenon and increase the minimum flow rate by up to 65 times. The COMSOL software performs simulation calculations on the ultrasonic equipment. When the double ultrasonic transducers are axially separated by 12 cm, the axis crosses 90(°) and the power is set to 50 W, the regional mass transfer flux can be significantly increased. Based on the revision of COMSOL software data, the separation efficiency of Lycium barbarum polysaccharides has been greatly improved, which provides necessary data accumulation for the industrial production of Lycium barbarum polysaccharides in the future.

Key words: COMSOL software, Lycium barbarum polysaccharide, Ultrafiltration membrane, Bioreactor, Membrane obstruction

CLC Number: