Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (35): 1-6.doi: 10.11924/j.issn.1000-6850.casb2022-0643

Special Issue: 生物技术

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Flocculation Decolorization and Membrane Separation Techniques for the Purification of Saponin from Gleditsia sinensis

LIU Yanping1(), WANG Ying2(), JIN Yongfu2, LI Jiaxin2, SUN Weiyu2, ZHAO Junjie3, XUE Gang2   

  1. 1Henan Academy of Forestry, Zhengzhou 450008
    2Henan Key Laboratory of Industrial Microbial Resources and Fermentation Technology, Nanyang Institute of Technology, Nanyang, Henan 473004
    3Henan Hongfu Forestry and Pharmaceutical Co., Ltd., Neixiang, Henan 474350
  • Received:2022-07-29 Revised:2022-09-28 Online:2022-12-15 Published:2022-12-09
  • Contact: WANG Ying E-mail:lypbox@126.com;13461965036@163.com

Abstract:

In order to obtain high-purity saponin of Gleditsia sinensis, the crude saponin extracted from peel of Gleditsia sinensis by ethanol extracting was used as raw material to study the treatments by various inorganic low molecular flocculants and organic polymer flocculants. By comparing the effects of different kinds and different dosage of flocculants on the purification and decolorization of saponin, the best kind and optimum dosage of flocculants were determined. Then the membrane treatment process was used to further improve the purity of saponin products. The results showed that the best flocculation process was dicyandiamide-dicyandiamide formaldehyde or dicyandiamide-dicyandiamide ammonium flocculants, and the optimum dosage was 1.5% and the stirring speed was 80 r/min. The decolorization rate of Gleditsia sinensis saponin obtained by spray drying was 60% and the saponin content of Gleditsia sinensis increased from 43% to more than 78% after being treated by rolling membrane with three molecular weights of 10000 Da, 2000 Da and 500 Da. Taken together, flocculation decolorization and membrane treatment techniques could be used for the production of high-purity saponin from Gleditsia sinensis, and the study could be a basis for the comprehensive development and utilization of Gleditsia sinensis resources.

Key words: saponin of Gleditsia sinensis, flocculation, decolorization, membrane separation, purification

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