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A novel in situ membrane cleaning method using periodic electrolysis / Raed Hashaikeh, Boor Singh Lalia, Victor Kochkodan, Nidal Hilal

Journal of Membrane Science, Volume: 471, Pages: 149 - 154

Swansea University Author: Nidal Hilal

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Abstract

Membrane fouling is the major problem during the practical application of membrane separation processes in industry and water treatment. Therefore a search for novel efficient methods of membrane cleaning is currently of crucial importance for membrane-based technologies. The paper describes a new m...

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Published in: Journal of Membrane Science
ISSN: 0376-7388
Published: 2014
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URI: https://cronfa.swan.ac.uk/Record/cronfa20323
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Abstract: Membrane fouling is the major problem during the practical application of membrane separation processes in industry and water treatment. Therefore a search for novel efficient methods of membrane cleaning is currently of crucial importance for membrane-based technologies. The paper describes a new method of membrane cleaning, which is based on periodic electrolysis using a novel electrically conductive membrane to remove/prevent membrane fouling. The membrane consists of a thin electrically conductive layer of multi-walled carbon nanotubes (MWCNTs) deposited on the membraneÎ│s surface. The deposited MWCNTs allow the membrane to function as a cathode in an electrochemical system that includes the electrically conductive membrane, the salt water as an electrolyte and a stainless steel counter anode. The efficiency of the cleaning procedure in the flux recovery has been proved with typical bio- and inorganic membrane foulants such as CaCO3 and yeast suspensions. The cleaning mechanism during the electrolysis process is explained by the evolution of gases forming micro-bubbles at the membrane surface which remove the foulant material out from the membrane. The proposed method enables in situ membrane self-cleaning, thus providing a non-destructive, continuous and renewable approach for the mitigation of the different types of membrane fouling.
College: College of Engineering
Start Page: 149
End Page: 154