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

  1. 김형수, 藤田賢二, 안규홍, 송경근 (1995) 막 폐새 억제를 위한 맥동 원수 공급과 공기포요동세정 방법의 비교 연구, 한국수처리학회지, 3(1), pp.15-23
  2. 김석완, 임재림, 이준걸 (2006) 초음파를 이용한 침출수 처리를 위한 막분리 공정의 막힘현상 개선(1): 초음파의 영향인자 평가, 대한환경공학회지, 28(2), pp.207-215
  3. 김관엽, 김지훈, 이용수, 박재홍, 김형수 (2007) 침지형 MBR 공정에 적용한 PTFE 분리막의 성능 및 주기적인 화학역세에 의한 고플럭스 운전성 평가, 한국막학회, 추계추계학술발표회 논문집, pp.295-299
  4. 김관엽, 이의종, 송준섭, 김지훈, 김형수 (2008) 주기적인 약품 역세를 적용한 침지형 MBR 시스템의 운전성능에 관한 연구, 상하수도학회지, 22(1), pp.87-92
  5. 임우찬, 서경수, 유성환 (2004) 순환세정장치에 의한 MBR 공정의 흡입유량 증대에 관한 연구, 대한상하수도학회·한국물환경학회, 공동춘계 학술발표회 논문집, pp.247-250
  6. Bella G.D., Durante F., Torregrossa M. and Viviani G. (2006) The role of fouling mechanisms in a submerged membrane bioreactor during the start-up, Desalination, 200(1-3), pp.722-724 https://doi.org/10.1016/j.desal.2006.03.505
  7. Chang, Y., Kramer, A.J. and Lubben, D.R. (2002) Effective Membrane Fouling Control: A New Membrane Cleaning Concept, Proceedings of Water Quality Technology Conference, Seattle, WA
  8. Geng Z., E.R. Hall E.R. and Berube P.R. (2007) Membrane fouling mechanisms of a membrane enhanced biological phosphorus removal process, J. Membr. Sci., 296(1-2), pp.93-101 https://doi.org/10.1016/j.memsci.2007.03.019
  9. Hermia, J. (1982) Constant Pressure Blocking Filtration Laws-Application Topower-Law Non-Newtonian Fluids, Trans. Inst. Chem. Engrs., 60, pp.183-187
  10. Judd, S. (2006) The MBR book: Principles and Applications of Membrane Bioreactors in Water and Wastewater Treatment, Elsevier
  11. Zondervan E., Blankert B., Betlem B.J.L. and Roffel B. (2008) Development of a multi-objective coagulation system for long-term fouling control in dead-end ultrafiltration, J. Membr. Sci., 325(2), pp.823-830 https://doi.org/10.1016/j.memsci.2008.09.012