Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Long Term Operation of Microfiltration as a Pretreatment for Seawater Reverse Osmosis Processes

정밀여과를 이용한 역삼투법 해수담수화 전처리 공정의 장기운전 특성

  • 김수한 (부경대학교 건설공학부(토목공학과)) ;
  • 김충환 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 강석형 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 임재림 (한국수자원공사 수자원연구원 상하수도연구소)
  • Received : 2010.11.08
  • Accepted : 2010.12.13
  • Published : 2010.12.15
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Abstract

A pilot test was carried out to investigate the long term operation characteristics of Microfiltration (MF) system as a pretreatment for seawater reverse osmosis (SWRO) processes for two years. A commercialized MF module with pressurized operation type was used to filter seawater to remove particles which can foul reverse osmosis (RO) membrane. Silt Density Index (SDI) values of filtered seawater by the MF system were ranged from 0.14 to 1.79, which meet the SDI standard for RO feed water as depicted in previous literatures. Although the tested seawater is quite clean (i.e., dissolved organic cabon (DOC) concentration and turbidity were about 1 mg/l and less than 1 NTU, respectively) enough not to foul the MF membrane, steep increase in trans-membrane pressure (TMP) with a constant flux were observed over a whole operation period. A set of operation and water analysis data implies that the steep increase in TMP was resulted from iron and maganese fouling by the combination of metal corrosion by seawater and oxidation state by aeration and residual chlorine.

Keywords

References

  1. 김수한, 강석태, 박희경 (1998) RO를 이용한 해수담수화에 있어서의 전처리 최적화 방안, 대한환경공학회지, 20(10), pp.1367-1376.
  2. 환경부 (2008) 막여과 정수시설 설치기준 고시마련 연구, 환경부 수도정책과.
  3. AWWA (2006) Desalination of seawater and brackish water, American Water Works Association.
  4. Kim, S., and Hoek E.M.V. (2007) Interactions controlling biopolymer fouling of reverse osmosis membranes, Desalination 202, pp.333-342. https://doi.org/10.1016/j.desal.2005.12.072
  5. Knops, F. van Hoof, S., Futselaar, H., 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
  6. Pearce, G.K. (2007) The case for UF/MF pretreatment to RO in sea water applications, Desalination 203, pp.286-295. https://doi.org/10.1016/j.desal.2006.04.011
  7. Tuler, A., Glucina, K., Laine, J.M. (1999) Assessment of UF pretreatment prior RO membranes for seawater desalination, Desalination 125, pp.89-96. https://doi.org/10.1016/S0011-9164(99)00126-5
  8. US EPA (2005) Membrane Filtration Guidance Manual, United States Environ-mental Protect ion Agency.
  9. Wilf, M., and Schierach, M.K. (2001) Improved performance and cost reduction of RO seawater systems using UF pretreatment, Desalination 135, pp.61-68. https://doi.org/10.1016/S0011-9164(01)00139-4