Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (10): 72-77.

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A Tubular Electrochemical Reactor for Continuous Generation of Sodium Hypochlorite for Anti-Microbial Applications

Zeng Xin-an1  Qin Frank G. F.2   Li  Zhong-yan1   

  1. 1.Research Institute of Light Industry and Chemical Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China;2.Dept.of Chemical and Materials Engineering,The Univ.of Auckland,Private Bag 92019,Auckland City,New Zealand
  • Received:2004-06-07 Online:2005-10-25 Published:2005-10-25
  • Contact: Zeng Xin-an(born in 1972)，male，associate professor，Ph．D．，mainly researches on food and biotechno．1ogies and their applications E-mail:xazeng@scut.edu.cn
  • About author:Zeng Xin-an(born in 1972)，male，associate professor，Ph．D．，mainly researches on food and biotechno．1ogies and their applications
  • Supported by:

    Supported by the Key Technologies R&D Program of Guangzhou(2001-z-108-01)and Guangdong Provincial Natural Science Foundation(04020063)

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Abstract:

A pilot-scale reactor for continuously generating sodium hypochlorite(NaClo),which is applied to the cleaning-in-place(CIP)and the sterilizing-in-place(SIP),is introduced in this paper.The electrolytic cell of the reactor is constructed as a tubular electrochemical reactor with a nylon net membrane between the electrodes and with a layer of rare-earth metallic oxide,RuO2,as the active catalytic coating on the titanium anode surface.The performance of this generator is then analyzed from the point of view of reaction engineering.Experimental results indicate that the electric current eficiency of the reactor is above 82% .Biological study shows that the sterilizing water with the available chlorine content can effectively kill most microorganisms on the walls of food equipment.

Key words: sodium hypochlorite, sterilizing-in-place, electrochemical reactor, electrolytic cell