상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제21권4호
  • /
  • Pages.477-483
  • /
  • 2007
  • /
  • 1225-7672(pISSN)
  • /
  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
권호 표지

응집제 종류에 따른 RO막 표면 흡착 특성

Characteristics of Adsorption on the RO Membrane Surface by Coagulants Types

  • 정영미 (한국과학기술연구원 환경기술연구단) ;
  • 박찬혁 (한국과학기술연구원 환경기술연구단) ;
  • 이상협 (한국과학기술연구원 환경기술연구단) ;
  • 권지향 (건국대학교 공과대학 환경공학과)
  • 투고 : 2007.06.08
  • 심사 : 2007.08.06
  • 발행 : 2007.08.15
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A coagulation process for RO (reverse osmosis) membrane pretreatment system was an effective technology to remove colloidal and particulate matters. However, coagulant residuals from the pretreatment process may negatively affect RO membrane performance. The bench-scale coagulant exposure study was performed to investigate the effect of their residual on adsorbed mass which related to the membrane performance. Coagulant addition in this study ranged from 0 to 5mg/L ferric chloride, alum, and 2mg/L cationic polymer(poly-di-methyldiallyl ammonium chloride) as coagulant aids. This results showed that adsorbed mass is not significantly increased during short-time period, however, accumulated mass of coagulants on the membrane surface is significantly increased during long-time experimental period. The effect of pH on coagulants adsorption characteristics was significantly differed due to the electrostatic repulsive interactions between soluble coagulants and membrane surface charge. This data suggest that the RO membrane performance of drinking water treatment plant could be decreased by adsorption of residual coagulants when applied for the coagulant pretreatment process.

키워드

참고문헌

  1. 건설교통부 (2001) 수자원 장기 종합 계획
  2. Pearce G.K. (2007) The case for MF/UF pretreatment to RO in seawater applications, Desalination, 203, pp.286-295 https://doi.org/10.1016/j.desal.2006.04.011
  3. Boerlage S.F.E., Kennedy M., Aniye M.P. and Schippers J.C. (2003) Applications of the MFI-UF to measure and predict particulate fouling in RO systems, Journal of Membrane Science, 220, pp.91-116
  4. Park C., Kim H., Hong S. and Choi S.-I. (2006) Variation and prediction of membrane fouling index under various feed water characteristics, Journal of Membrane Science, 284, pp. 248-254 https://doi.org/10.1016/j.memsci.2006.07.036
  5. Wilf M. and Klinko K. (2001) Optimization of seawater RO systems design, Desalination, 138, pp.299-306 https://doi.org/10.1016/S0011-9164(01)00278-8
  6. Global Water Intelligence (2004) Desalination Markets: 20052015
  7. Vrouwenvelder J.S., Kappelhof J.W.N.M., Heijman S.G.J., Schippers J.C. and Kooij D. (2003) Tools for fouling diagnosis of NF and RO membranes and assessment of the fouling potential of feed water, Desalination, 157(1-3), pp. 361-365 https://doi.org/10.1016/S0011-9164(03)00417-X
  8. Knops F., Van Hoof S., Futselaar H. and Broens L. (2007) Economic evaluation of a new ultrafiltration membrane for pretreatment of seawater reverse osmosis, Desalination, 203, pp. 300-306 https://doi.org/10.1016/j.desal.2006.04.013
  9. Wiesner M.R.and Aptel P. (1996) Mass transport and permeate flux and fouling in pressure-driven processes. Water Treatment: Membrane Processes, McGraw-HilI, New York
  10. Cho M.-H., Lee C.-H. and Lee S. (2006) Effect of flocculation conditions on membrane permeability in coagulation-microfiltration, Desalination, 191,pp. 386-396 https://doi.org/10.1016/j.desal.2005.08.017
  11. Gregory J. (1988) Colloidal interactions, Materials Science Forum, 25-26, pp. 125-144
  12. Gabelich C.J., Yun T.I., Coffey B.M. and 'Mel' Suffet I.H. (2002) Effects of aluminum sulfate and ferric chloride coagulant residuals on polyamide membrane performance, Desalination, 150, pp. 15-30 https://doi.org/10.1016/S0011-9164(02)00926-8
  13. Ning R.Y. and Shen P.T.L. (1998) Observations from analysis of reverse osmosis membrane foulants, Ultrapure Water, 15, pp. 37-40.
  14. Gabelich C.J., Ishida K.P., Geringer F.W., Evangelista R., Kalyan M. and 'Mel' Suffet I.H. (2006) Control of residual aluminum from conventional treatment to improve reverse osmosis performance, Desalination, 190,pp. 147-160 https://doi.org/10.1016/j.desal.2005.09.002
  15. Craver C.D. (1982) The Coblentz Society Desk Book of Infrared Spectra, 2nd edition, The Coblentz Society, Kirkwood, MO