食品科学 ›› 2005, Vol. 26 ›› Issue (12): 165-169.

• 工艺技术 • 上一篇    下一篇

菜籽蛋白超滤液反冲对超滤膜污染的控制研究

 刘瑞兴, 董君英   

  1. 长沙理工大学生物与轻工系
  • 出版日期:2005-12-15 发布日期:2011-10-01

Effect of Online Backflushing by Water Permeating on Fouling of UF Membrane for Processing Rapeseed Protein Solution

 LIU  Rui-Xing, DONG  Jun-Ying   

  1. Department of Biology Engineering and Light Industry, Changsha University of Science and Technology
  • Online:2005-12-15 Published:2011-10-01

摘要: 超滤是制备植物油料蛋白的先进工艺技术,但膜的污染问题严重影响超滤技术的推广应用。本文在研究了菜籽蛋白水溶液在中空纤维超滤装置中的超滤行为之后,研究了膜面透过液反冲对膜污染的控制作用。实验结果表明:菜籽蛋白水溶液的超滤浓缩速率随时间延长而下降;对工作中的超滤膜进行定期间歇反冲(反冲时间20s、反冲频率为1次/15min、反冲压差为0.2MPa),是控制膜污染程度的有效措施,这样可以使超滤膜的透水速率恢复90%以上。

关键词: 菜籽蛋白, 超滤, 膜污染, 间歇反冲

Abstract: Ultrafiltration is a kind of advanced technology used for processing vegetable protein. But its application is badly limited by the membrane fouling problem. This paper reported the UF behavior of rapeseed protein solution in hollow-fibre UF system, and the effect of online backflushing by the water permeating on fouling of UF membrane for processing the rapeseed protein solution. The optimum parameters of backflushing technology used for online fouling controlling were obtained. The experiment showed that the UF rate declined with time extension, and that an effective approach to control the fouling degree was to periodically backflush the UF membrane at work for 20 seconds at intervals of 15min by permeating water at 0.2MPa pressure difference, which could renew more than 90 percent water permeating capability.

Key words: rapeseed protein, ultrafiltration(UF), membrane fouling, interval backflushing