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The Membrane Society of Korea (한국막학회)
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Analysis of Filtration Characteristics of Submerged Microfiltration Membranes for Rainwater Filtration

빗물여과를 위한 침지식 정밀여과막의 여과특성 해석

  • Received : 2014.02.03
  • Accepted : 2014.02.20
  • Published : 2014.02.28
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Abstract

Rainwater harvesting is a process by which rainwater collected from rooftop or other catchment is purified so that the water can be directly or indirectly used by human beings for beneficial uses. As rainwater is increasingly considered for high quality purposes, membranes have gained an important place in rainwater treatment. It has advantages such as the production of high quality water, small footprint, and affordable energy consumption. Nevertheless, membrane fouling is regarded as a serious problem similar to the cases of water treatment and wastewater reclamation. In this study, we applied microfiltration (MF) membranes for rainwater treatment. In addition, a low pressure ultraviolet (UV) process was also use as a pretreatment to control notonly. To quantify the effect of UV on organic matters, both total organic carbon (TOC) and UV absorbance (UVA) were measured. Moreover, the effect of UV pretreatment on membrane fouling was investigated. Experimental results indicated that the pretreatment of membranes using LPUV was effective to control fouling of MF membranes only when the rainwater was contaminated by algae. This was attributed the reduction and modification of organics after UV treatments. It is likely that the UV/MF process is a promising option for water treatment in decentralized water treatment such as micro water grid systems.

지붕이나 여러 가지 방법과 장소에서 수집된 빗물을 처리하면 직접적 간접적으로 유익하게 사용될 수 있다. 이러한 빗물은 점점 더 높은 품질을 위해 고려되고 있고, 분리막은 이러한 빗물 처리를 위한 중요한 기술이다. 특히, 분리막은 고품질 물 생산, 높은 집적도 및 낮은 에너지 소비 등의 장점이 있다. 그럼에도 불구하고, 막오염은 수처리 및 폐수 재활용 부분과 마찬가지로 심각한 문제로 간주되고 있다. 본 연구에서는 빗물 처리에 정밀여과(MF)막을 적용하였고, 저압 자외선(LPUV) 처리를 정밀여과막의 전처리로 사용하였다. 유기물에 대한 UV의 영향을 정량화하기 위해 총 유기탄소(TOC) 및 UV 흡광도(UVA)를 모두 측정하였다. 또한 UV 전처리 효과에 따른 막의 오염 정도를 조사하였다. LPUV 전처리를 하고 실험을 한 결과 조류에 의해 오염된 빗물에서 막의 오염을 제어하는데 효과적임을 알 수 있었으며, 이것은 UV 처리 후 유기물의 양이 감소하고 특성이 변화하기 때문이었다. 따라서 UV/MF 처리는 마이크로 워터 그리드 시스템과 같은 수처리를 위한 유망한 옵션이 될 수 있을 것으로 생각된다.

Keywords

References

  1. K. W. Konig, "Rainharvesting in Building", Wilo., (2001).
  2. T. Masaru, "Strategies Toward Buidling "Green" Society", Central law publishing Co., (2002).
  3. R. H. Kim, "Rainwater utilization for urban establishment of new paradigm. in A Joint Conference with Korea Society of Water and Wastewater and Korea Society on Water Quality", (2002).
  4. R. H. Kim, "Rainwater utilization and functional changes in building roof, Construction Technology Review, 220, 13-19.
  5. R. H. Kim, "Rainwater utilization for urban establishment of new paradigm, F 41-44. in A Joint Conference with Korea Society of Water and Wastewater and Korea Society on Water Quality", (2002).
  6. R. H. Kim, Utilization of ground water and rainwater in urban area, Geoenvironment, 217-241. (2001).
  7. R. H. Kim, "Development trend of rainwater utilization", Construction Technology Review, 211, 23-28.
  8. A. Fewkes, "The use of rainwater for WC flushing: the field testing of a collection system", Building and Environment, 34, 765-772 (1999). https://doi.org/10.1016/S0360-1323(98)00063-8
  9. R. H. Kim, "Rainwater storage and utilization to overcome drought, in Preventing droughts", (2002).
  10. U. Dorfler and I. Scheunert, "S-Triazine herbicides in rainwater with special reference to the situation in germany", Chemosphere, 35(1/2): 77-85 (1997). https://doi.org/10.1016/S0045-6535(97)00140-9
  11. C. Reimann, et al., "Rainwater composition in eight arctic catchment in northern europe (Finland, Norway, and Russia)", Atmospheric Environment, 31(2), 159-170 (1997). https://doi.org/10.1016/1352-2310(96)00197-5
  12. S. Lee, et al., "Analysis of filtration characteristics in submerged microfiltration for drinking water treatment", Water Research, 42(12), 3109-3121. (2008). https://doi.org/10.1016/j.watres.2008.03.001
  13. Hach, Hach Water Analysis Handbook, 2nd ed. Colorado, USA: Hach Company, (1992).
  14. J. H. Kim, "Physicochemical Effect on Permeate Flux in a Hybrid Ozone-Ceramic Ultrafiltration Membrane Treating Natural Organic Matter", Membrane Journal, 18(4), 358-360 (2008).
  15. Y. T. Lee, "Membrane Fouling Effect with Organic-Inorganic Materials Using the Membrane Separation in Drinking Water Treatment Process", Membrane Journal, 13(4), 221-227 (2003).
  16. J. M. Lee and B. S. Lee, "Experimental and Theoretical Consideration for Flow Rate, Pressure Drop, and Permeate Flow in a Hollow Fiber Membrane", Membrane Journal, 22(6), 470-480 (2012).