Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (4): 42-45.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Extraction of Polysaccharides from Opuntia monacantha Haw. by Membrane Ultrafiltration and Corresponding Inf1uence Factors

Yang Ning1  Zhao Mou-ming1 Cui Chun1  Zhang Gui-he1  yang Bao2   

  1. 1. School of Light Industry and Food Sciences , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China;2. South China Botanical Garden , Chinese Academy of Sciences , Guangzhou 510650 , Guangdong , China
  • Received:2006-09-27 Online:2007-04-25 Published:2007-04-25
  • Contact: 赵谋明，教授，博士生导师. E-mail: femmzhao@scut. edu. cn E-mail:yning789@126.com
  • About author:杨宁(1964-)，男，博士生，高级工程师，主要从事食品生物技术研究.
  • Supported by:

    广东省科技计划项目(2005B20401024) ;广州市科技攻关项目(2004Z1-E0061 )

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Abstract:

The separation , purification and concentration of the polysaccharides from Opuntia monαcαnthαHaw.were carried out via membrane ultrafitration using the membranes with different cut-off molecular masses. The effects of several parameters such as the pressure , the temperature , the purification time , the flow rate and the con-centration multiple on the ultrafiltration process were then investigated. The optimal conditions for the ultrafiltration were finally determined. It is found that , for the membrane with a cut-off molecular mass of 10 000 ku , when the pressure , the temperature , the flow rate and the concentration multiple are respectively0. 20 MPa , 25℃ , 0. 04-0.05 Umin and 5 -7 , a yield of crude polysaccharides of 0.95%can be reached. Moreover , as compared with the traditional vacuum concentration , membrane ultrafiltration is easier to obtain high-quality crude polysaccharides with a higher yield , which is helpful to the further extraction and purification of polysaccharides in the subsequent process.

Key words: ultrafiltration, membrane separation, concentration, purification, cactus polysaccharide