Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Effect of Water Back-flushing Time and Polypropylene Beads in Hybrid Water Treatment Process of Photocatalyst-coated PP Beads and Alumina Microfiltration Membrane

광촉매 코팅 폴리프로필렌(PP) 비드와 알루미나 정밀여과막의 혼성 수처리 공정에서 물역세척 시간 및 PP 비드의 영향

  • Park, Jin Yong (Dept. of Environmental Sciences & Biotechnology, Hallym University) ;
  • Kim, Sunga (Dept. of Environmental Sciences & Biotechnology, Hallym University) ;
  • Bang, Taeil (Dept. of Environmental Sciences & Biotechnology, Hallym University)
  • 박진용 (한림대학교 환경생명공학과) ;
  • 김성아 (한림대학교 환경생명공학과) ;
  • 방태일 (한림대학교 환경생명공학과)
  • Received : 2016.08.22
  • Accepted : 2016.08.27
  • Published : 2016.08.31
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Abstract

The effects of water back-flushing time (BT) and photocatalyst-coated polypropylene (PP) beads were investigated in hybrid water treatment process of alumina microfiltration and the PP beads in this study, and compared with the previous study with alumina ultrafiltration membrane and the same PP beads. The BT was changed in the range of 6~30 s with fixed 10 min of back-flushing period (FT). Then, the BT effects on resistance of membrane fouling ($R_f$), permeate flux (J) and total permeate volume ($V_T$) were observed during total filtration time of 180 min. As longer BT, $R_f$ decreased and J increased dramatically; however, $V_T$ was the maximum at BT 10 s. The treatment efficiency of turbidity was high beyond 99.0%, and the BT effect was not shown. The treatment efficiency of organic matters was the highest value of 89.0% at no back-flushing (NBF), and increased as longer BT. The optimum input concentration of the PP beads was 20 g/L in the viewpoint of membrane fouling; however, the optimum PP beads of the previous study was 40 g/L. The treatment efficiency of turbidity and organic matters were the maximum at 30 g/L of the PP beads; however, those of the previous study with alumina ultrafiltration membrane and the same PP beads were the highest at 40 g/L.

본 연구에서는 알루미나 정밀여과 및 광촉매 코팅 폴리프로필렌의 혼성 수처리 공정에서 물역세척 시간(back-flushing time, BT) 및 PP 구 변화의 영향을 알아보고, 알루미나 한외여과막와 동일한 PP 비드를 사용한 선행 결과와 비교하였다. 물역세척 주기(FT)는 10분으로 고정한 채, BT를 6~30초로 변화시키면서, 그 영향을 180분 운전 후 막 오염에 의한 저항($R_f$), 투과선속(J)과 총여과부피($V_T$) 측면에서 고찰하였다. BT가 길어질수록 $R_f$는 급격히 감소하고 J는 증가하였으나, $V_T$는 BT 10초일 때 최대였다. 탁도의 처리효율은 99.0% 이상으로 BT의 영향이 보이지 않았다. 한편, 유기물 처리효율은 역세척 없는 조건(NBF)에서 89.0%로 가장 높았으며, BT가 길어질수록 증가하였다. 막오염 측면에서 최적 PP 비드의 투입 농도는 20 g/L이었으나, 알루미나 한외여과막와 동일한 PP 비드를 사용한 선행 결과 최적 PP 비드의 농도는 40 g/L이었다. 탁도와 유기물 처리효율은 PP 농도 30 g/L에서 최대였으나, 선행 결과 탁도와 유기물 처리효율은 모두 PP 농도 40 g/L에서 가장 높았다.

Keywords

References

  1. H. Zhang, X. Quan, S. Chen, H. Zhao, and Y. Zhao, "Fabrication of photocatalytic membrane and evaluation its efficiency in removal of organic pollutants from water", Sep. Pur. Tech., 50, 147 (2006). https://doi.org/10.1016/j.seppur.2005.11.018
  2. H. Yamashita, H. Nakao, M. Takeuchi, Y. Nakatani, and M. Anpo, "Coating of $TiO_2$ photocatalysts on super-hydrophobic porous teflon membrane by an ion assisted depositionmethod and their self-cleaning performanc", Nucl. Instr. Meth. Phys. Res., 206, 898 (2003). https://doi.org/10.1016/S0168-583X(03)00895-4
  3. K. W. Park, K. H. Choo, and M. H. Kim, "Use of a combined photocatalysis/microfiltration system for natural organic matter removal", Membr. J., 14, 149 (2004).
  4. H. C. Oh, "Photocatalytic degradation characteristics of organic matter by highly pure $TiO_2$ nanocrystals", Master Dissertation, Kangwon National Univ., Chuncheon, Korea (2006).
  5. J. U. Kim, "A study on drinking water treatment by using ceramic membrane filtration", Master Dissertation, Yeungnam Univ., Daegu, Korea (2004).
  6. C. K. Choi, "Membrane technology", Chem. Ind. & Tech., 3, 264 (1985).
  7. R. Molinari, F. Pirillo, M. Falco, V. Loddo, and L. Palmisano, "Photocatalytic degradation of dyes by using a membrane reactor", Chem. Eng. Proc., 43, 1103 (2004). https://doi.org/10.1016/j.cep.2004.01.008
  8. T. H. Bae and T. M. Tak, "Effect of $TiO_2$ nanoparticles on fouling mitigation of ultrafiltration membranes for activated sludge filtration", J. Membr. Sci., 249, 1 (2005). https://doi.org/10.1016/j.memsci.2004.09.008
  9. R. Molinari, C. Grande, and E. Drioli, "Photocatalytic membrane reactors for degradation of organic pollutants in water", Cata. Today, 67, 273 (2001). https://doi.org/10.1016/S0920-5861(01)00314-5
  10. K. Azrague, E. Puech-Costes, P. Aimar, M. T. Maurette, and F. Benoit-Marquie, "Membrane photoreactor (MPR) for the mineralisation of organic pollutants from turbid effluents", J. Membr. Sci., 258, 71 (2005). https://doi.org/10.1016/j.memsci.2005.02.027
  11. G. S. Cong and J. Y. Park, "Advanced water treatment of high turbidity source by hybrid process of ceramic ultrafiltration and photocatalyst: 1. effect of photocatalyst and water-back-flushing condition", Membr. J., 21, 127 (2011).
  12. J. Y. Park and K. S. Lee, "Advanced water treatment of high turbidity source by hybrid process of photocatalyst and ceramic microfiltration: effect of organic materials in water-back-flushing", Membr. J., 21, 72 (2011).
  13. H. C. Lee, "Hybrid process development of ceramic microfiltration and activated carbon adsorption for advanced water treatment of high turbidity source", Master Dissertation, Hallym Univ., Chuncheon, Korea (2008).