Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (4): 105-109.doi: 10.3969/j.issn.1000-565X.2011.04.019

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

Multi-Stage Automatic Ultrafiltration System Enhanced with Complex Physical Fields

Fu Xiao-qin  Li Lin  Li Bing  Chen Ling   

  1. School of Light Industry and Food Sciences,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2010-04-02 Revised:2010-12-07 Online:2011-04-25 Published:2011-03-01
  • Contact: 傅晓琴(1972-)，女，博士生，主要从事糖类物质及其药物制备与生物利用的研究 E-mail:xqfu@scut.edu.cn
  • About author:傅晓琴(1972-)，女，博士生，主要从事糖类物质及其药物制备与生物利用的研究
  • Supported by:

    广东省科技攻关项目(200713020801001)；广东省教育厅产学研基地科技成果转化重大项目(cgzhzd0704)；广东省自然科学基金团队项目(05200617)

PDF

1190

Abstract:

Proposed in this paper is an automatic ultrafiltration system enhanced with ultrasonic and pulse electric field,which is used to overcome the concentration polarization and membrane fouling during the ultrafiltration and improve the automation level of ultrafiltration process.The system consists of a crude filtration loop,two ultrafiltration loops,a cleaning loop and a heat-exchange loop,and possesses excellent operation flexibility because it can simultaneously perform multi-stage or separately perform single-stage ultrafiltration.It also possesses a multi-layer distributed automatic control subsystem based on Kunlun MGCS configuration,which adopts an industrial personal computer and a Simens S7-200 PLC as the system hardware.The application of the proposed system to the concentration of pumpkin polysaccharides shows that,in the adopted experimental conditions,the average permeation flux increases by 1.15~2.53 times and the rejection by 15 points of percentage,which means that the system greatly improves the ultrafiltration efficiency and effect.

Key words: ultrafiltration, ultrasonic field, pulsed electric field, physical field-aided enhancement, automatic control