Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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The Effect of Chemical Backwash on Filtration Performance of Batch Membrane Filtration System

회분식 막여과 시스템에서 약품역세가 여과성능에 미치는 영향

  • 김관엽 (성균관대학교 건설환경시스템공학과 환경공학연구실) ;
  • 이의종 (성균관대학교 건설환경시스템공학과 환경공학연구실) ;
  • 권진섭 (성균관대학교 건설환경시스템공학과 환경공학연구실) ;
  • 김형수 (성균관대학교 건설환경시스템공학과 환경공학연구실)
  • Received : 2009.08.13
  • Accepted : 2009.12.14
  • Published : 2009.12.15
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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

References

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