Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Reduction of Suspended Solids in First Flush from a Building Rooftop using Various Media

여과재를 활용한 건물옥상유출 초기빗물의 부유물질 저감

  • Kim, Seongbeom (Department of Environmental Engineering, Kumoh National Institute of Technology) ;
  • Lee, Wontae (Department of Environmental Engineering, Kumoh National Institute of Technology)
  • 김성범 (금오공과대학교 환경공학과) ;
  • 이원태 (금오공과대학교 환경공학과)
  • Received : 2017.01.24
  • Accepted : 2017.03.16
  • Published : 2017.04.30
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Abstract

We analyzed the water quality of first flush and rainfall runoff from a building rooftop, and investigated the removal of suspended solids (SS) in first flush using various media to develop a first flush filtration system. Particle size distribution exhibited most of particles in first flush from the rooftop ranged from 10 to 30 ${\mu}m$. SS concentrations maxed in 10~20 min and decreased afterwards. Dissolved organics and inorganic materials in runoff also showed highest levels in first flush (10 min). Filtration tests using anthracite (AC), polyurethane (PU), polypropylene (PP) showed about 50% of SS removal during the first 10 min operation, but the removal rates dramatically decreased after 20 min of filtration. Based upon the results from rinse and run cycle tests, only AC could achieve nice cycles without distinct decease of SS removal. SS removal rates increased with higher depth of media bed and lower flowrate. The system achieved over 50% of SS removal with a media depth of 30 cm and flowrate < 12 L/min.

건물의 우수관에 연결하여 초기빗물의 부유물질을 처리할 수 있는 장치를 개발하기 위하여 건물옥상 유출 빗물의 수질특성 변화를 파악하고 다양한 여재를 활용해 초기빗물의 부유물질 제거를 연구하였다. 건물옥상 유출빗물의 입자성 물질은 대부분 $10{\sim}30{\mu}m$의 크기로, 부유물질 농도는 강우시 초기 10~20분까지 높았고 점진적으로 감소하였다. 옥상유출빗물의 용존성 유기물과 무기물의 농도도 유출 초기에 높게 나타났다. Anthracite (AC), Polyurethane (PU), Polypropylene (PP) 여재로 여과시 초기에 50%의 부유물질을 제거할 수 있었으나 20분 이상 여과시 제거율이 급격히 낮아졌다. 세척후 반복여과를 고려하면 AC 여재만 9회까지 재사용가능하였다. 여재층의 높이가 높을수록, 통과유량이 적을수록 시간에 따른 SS 제거율 감소폭은 적었고, 여재층 30 cm, 유량 12 L/min 이하로 운전할 경우 초기빗물(SS = 450 mg/L)의 SS 제거율 50%를 달성할 수 있었다.

Keywords

References

  1. Kim, S. H., Kim, E. M. and Lim, Y. M., "A Research on the Development of a GIS-Based Real-Time Urban Water Management System," J. Korea Academia-Industrial, 12(11), 5290-5299(2011).
  2. "Water The Environmental Outlook to 2050," OECD Global Forum on Environment : Making Water Reform Happen, (2011).
  3. Suh, J. S., Kim, Y. H., Han, K. H. and Kim, D. W., "Legal Improvements for SWG Application Relevant to the Water Loop System with Multi-Water Resources," KCID J., 21(1), 127-140(2014).
  4. Korea Ministry of Environment, "Law on Reuse Promotion and Support of Water," (2017).
  5. Korea Ministry of Enviroment, "Sewer statistics," (2015).
  6. Hathaway, J. M., Tucker, R. S., Spooner, J. M. and Hunt, W. F., "A Traditional Analysis of the First Flush Effect for Nutrients in Stormwater Runoff from Two Small Urban Catchments," Water, Air, & Soil Pollut., 223(9), 5903-5915 (2012). https://doi.org/10.1007/s11270-012-1327-x
  7. Choi, S. Y., Ko, K. B., Lee, J. Y. and Lim, S. H., "Water Quality of the First Flushes in the Surface Runoff at an Intersection," J. Environ. Sci. Int., 15(4), 359-364(2006). https://doi.org/10.5322/JES.2006.15.4.359
  8. Roh, S. D., Lee, D. K. and Chun, Y. K., "A Study on the Early-stage Storm Runoff Treatment for the Reduction of Non-point Pollution Materials on the Road," J. Korean Soc. Water Qual., 20(5), 525-533(2004).
  9. Korea Ministry of Environment, Manual : Operation, Installation and Management of Non Point Source Pollution(2014).
  10. Brodie, I. M. and Egodawatta, P., "Relationships Between Rainfall Intensity, Duration and Suspended Particle Washoff from an Urban Road Surface," Hydrol. Res., 42(4), 239-249 (2011). https://doi.org/10.2166/nh.2011.117
  11. Liesl, L. T. and Schiff, K. C., "Effects of Rainfall Intensity and Duration on First Flush of Stormwater Pollutants," Southern California Coastal Water Research Project Annual Report 2002, 209-215(2001).
  12. Schiff, K. C., Tiefenthaler, L. L., Bay, S. M. and Greenstein, D. J., "Effects of Rainfall Intensity and Duration on the First Flush from Parking Lots," Academic Editor: Brigitte Helmreich, 8(8), 320-330(2016).
  13. Kim, S. G., Lee, T. S., Kim, Y. C. and Han, C. B., "Study on Water Quality Characteristics of Collected Rainwater from Different Harvesting Methods," KSWST J. Water Treet., 24 (2), 89-99(2016). https://doi.org/10.17640/KSWST.2016.24.2.89
  14. Lee, W. T. and Kim, S. B., "10-1682756," 11-29(2016).
  15. Lee, S. Y., Choi, J. Y., Hong, J. S., Choi, H. S., Kim, L. H., "Cost-Effective Assessment of Filter Media for Treating Stormwater Runoff in LID Facilities," J. Wetlands Res., 18 (2), 194-200(2016). https://doi.org/10.17663/JWR.2016.18.2.194
  16. Won, C. H., Shin, M. H., Choi, Y. H., Shin, J. Y., Park, W. J. and Choi, J. D., "Simulations of Runoff using Rice Straw Mats and Soil Amendments," J. Korean Soc. Agric. Eng., 54(2), 95-102(2012). https://doi.org/10.5389/KSAE.2012.54.2.095
  17. Kus, B. G., "Cost Effective filtration System to Improve the Water Quality in Rainwater Tanks," University of Technology, Sydney, Australia(2014).
  18. Han, C. B., Lee, T. S., Seo, G. T. and Kang, M. A., "Characteristic Quality of Rain Water by Various Materials for Collection and Storage," KSWST J. Water Treet., 21(1), 13-21(2013).
  19. Korea Ministry of Environment, "Environmental Standard or Water Quality,"(2015).
  20. Han, S. G. and Kim, J. M., "Study on Radioactive Material Management Plan and Environmental Analysis of Water (II) Study of Management System in Water Environment of Japan," J. Korean Soc. Radiol., 38(3) 305-313(2015).
  21. Lee, K. C., Gegal, B. C., Choi, L. W. and Lee, W. T., "Formation Characteristics and Control of Disinfection Byproducts in a Drinking Water Treatment Plant Using Lake Water," J. Korean. Soc. Environ. Eng., 37(5), 269-276(2015). https://doi.org/10.4491/KSEE.2015.37.5.269
  22. Park, G. J., Park, M. S., Kim, H. S., Lim, Y. S. and Kim, S. P., "Development of Domestoc Rainwater Treatment System and its Applicaton in the Field," J. Wetlands Res., 18(1), 24-31(2016). https://doi.org/10.17663/JWR.2016.18.1.024
  23. Lee, J. S., Jung, G. B., Shin, J. D. and Kim, J. H., "Chemical Properties of Rainwater in Suwon and Taean Area during Farming Season," Korea J. Agric. Forest Meteorol., 6(4), 250-255(2004).
  24. Hyun, K. H., Choi, J. J. and Choung, Y. K., "The Effect of Impermeable Surface and Rainwater Infiltration Facilities on the Runoff pH Housing Complexes," Korea Environ. Impact Assessment Inst., 19(1), 39-47(2010).