대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제37권3호
  • /
  • Pages.165-174
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  • 2015
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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섬유필터를 사용한 강우유출수의 부유물질 제거 방법의 개발

Removal of Suspended Solids from Stormwater Runoff Using a Fabric Filter System

  • Koo, Young Min (Department of Environmental Engineering, Chungnam National University) ;
  • Kim, Jaeyoung (Department of Environmental Engineering, Chungnam National University) ;
  • Kim, Byung Ro (Department of Environmental Engineering and Energy, Myongi University) ;
  • Seo, Dongil (Department of Environmental Engineering, Chungnam National University)
  • 투고 : 2015.03.05
  • 심사 : 2015.03.31
  • 발행 : 2015.03.31
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초록

강우시 표면유출에 의해 지표수에 유입되는 우수에는 토사를 포함한 각종 비점오염 물질이 다량 포함되어 있으며 이는 지표수의 수질관리에 부정적인 영향을 미치고 있다. 유역의 오염물질이 수계에 도달하기 전에 처리하는 것이 바람직하며 따라서 강우유출수를 처리하는 다양한 방법들이 시도되고 있다. 그러나 일반적인 빗물오염 제어시설 및 장치들은 설치 및 유지관리를 위해 많은 노력과 비용을 요구하는 문제점 가지고 있다. 본 연구에서는 유역의 초기우수에 의한 오염을 제어하기 위해 경제적으로 타당하고 설치 및 관리가 용이한 섬유 필터를 이용하여 부유물질을 제거할 수 있는 방법을 개발하였다. 여재는 경제적이면서 내구성이 우수한 폴리에스터계열의 섬유 필터를 사용하였으며, 연구 대상지역 강우유출수의 입도분석 결과에 따라 $20{\mu}m{\sim}94{\mu}m$ 범위에서 다양한 공극의 여재에 대한 성능을 실험을 통해 분석하였다. 수두별 여과성능을 분석하기 위한 실험 장치를 고안 제작하여 필터 공극에 따른 섬유 필터의 TSS 제거 효율을 평가 하였다. 수두가 높을수록 여과속도가 증가하는 것을 확인하였으며 공극별 여과 속도를 측정하여 분석하였다. 섬유 필터의 공극 크기가 작을수록 TSS 제거효율이 증가되었으나, 공극별 TSS 제거 효율은 대체적으로 양호하나 유사한 편으로서 TSS의 대부분의 질량은 입자의 크기가 큰 부분에 치중되어 있는 것이 주요 원인으로 분석된다.

Non-point source pollution associated with suspended solids in stormwater has been known to often adversely affect surface water ecosystems. Various methods of treating stormwater in the basin area before the stormwater reaches the receiving body of water have been developed. However, these treatment methods tend to be costly to install and also to maintain. In this study, an economical way of removing TSS (total suspended solids) from stormwater runoff with a fabric filter system was developed. Polyester was chosen as a fabric-filter material, because it was found to be economical in cost and relatively resistant to various chemicals. An experimental device was developed and used to determine filtration rates through polyester fabric samples of a series of several pore-opening sizes ($20{\mu}m$ to $94{\mu}m$) under a series of water-heads (0.25 to 1 m). It was found that the filtration rate increased as the size of water head increased. It was also found that the smaller the pore size of the fiber filter was, the higher the TSS removal efficiency was. However, the TSS removal efficiency was not found to be much different among the filters with different sizes of pore opening due to the fact that most mass of TSS was associated with large particles.

키워드

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  3. Reduction of Pollutant Concentrations in Urban Stormwater Runoff by Settling vol.38, pp.4, 2016, https://doi.org/10.4491/KSEE.2016.38.4.210
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