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The Effect of Chemical Backwash on Filtration Performance of Batch Membrane Filtration System  

Kim, Kwan Yeop (성균관대학교 건설환경시스템공학과 환경공학연구실)
Lee, Eui Jong (성균관대학교 건설환경시스템공학과 환경공학연구실)
Kwon, Jin Sub (성균관대학교 건설환경시스템공학과 환경공학연구실)
Kim, Hyung Soo (성균관대학교 건설환경시스템공학과 환경공학연구실)
Publication Information
Journal of Korean Society of Water and Wastewater / v.23, no.6, 2009 , pp. 855-864 More about this Journal
Abstract
The main object of this work was to determine the influence of periodic chemical backwash on filtration resistance in membrane filtration system. In this work Hermia's models were used to investigate the fouling mechanisms involved in the microfiltration of $0.45{\mu}m$ filtered sewage feed. Batch microfiltration experiments were performed at transmembrane pressure 0.4 bar and different feed SCOD concentration (9~67 mgSCOD/L). The results showed that the best fit to experimental data corresponded to the intermediate blocking model followed by the standard and complete blocking model for all the experimental conditions tested. From the simulation results of filtration performance, it was found that in order to maintain sustainable operation of membrane filtration system, irreversible foulant component accumulated continuously on membrane surface and/or pore must be effectively removed. In addition, it was verified that periodic chemical backwash using NaOCl or NaOH effectively improved filtration performance of membrane.
Keywords
membrane filtration; fouling; chemical backwash; pore blocking resistance; adsorption resistance; filtration performance;
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Times Cited By KSCI : 2  (Citation Analysis)
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