Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Operational Performance of Submerged Membrane Bioreactor Combined with Periodic Chemical Backwash

주기적인 약품역세를 적용한 침지형 MBR 시스템의 운전성능에 관한 연구

  • 김관엽 (성균관대학교 건설환경시스템공학과) ;
  • 이의종 (성균관대학교 건설환경시스템공학과) ;
  • 송준섭 (성균관대학교 건설환경시스템공학과) ;
  • 김지훈 (성균관대학교 건설환경시스템공학과) ;
  • 김형수 (성균관대학교 건설환경시스템공학과)
  • Received : 2007.12.31
  • Accepted : 2008.01.25
  • Published : 2008.02.15
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Abstract

Purposes of this study were to evaluate operational performance of submerged membrane bioreactor (MBR) combined with periodic chemical backwash. Five lab-scale submerged MBRs were performed in accordance with NaOH dose, backwash solution volume. While filtration resistance of MBR system without backwash (Control) was increased persistently from startup, those of four MBR systems (RUN 1-4) with chemical backwash were maintained at $(1.4{\pm}0.16){\times}10^{12}$, $(8.6{\pm}0.90){\times}10^{11}$, $(1.9{\pm}0.10){\times}10^{12}$, $(1.4{\pm}0.10){\times}10^{12}l/m$, respectively. Under chemical backwash condition of 0.0230 M, 375 mL, permeability of membrane was highest at flux of $30L/m^2/hr$. According to results from experiment that changing condition of dose and volume, it was estimated that effect of chemical dose acts more greatly than backwash solution volume. Because COD removal rates of all MBR systems with chemical backwash were more than 96%, it was proved that NaOH added to backwash solution did not affect microorganism.

Keywords

References

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