Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Experimental Evaluation of Particulate-matter Filtration Performance of a Bottom Ash-Silica Sand Mixture

석탄 저회-규사 필터의 입자상물질 여과 성능 실험적 평가

  • Lee, Dong-Hyun (Dept. of Civil and Environmental Engrg., Pusan National Univ.) ;
  • Lee, Hong-Kyoung (Neotech. Co. Ltd.) ;
  • Lee, Yun-Jae (Dept. of Civil and Environmental Engrg., Pusan National Univ.) ;
  • An, Jaehun (Dept. of Civil and Environmental Engrg., Pusan National Univ.)
  • 이동현 (부산대학교 사회환경시스템공학과) ;
  • 이홍경 ((주)네오테크) ;
  • 이윤제 (부산대학교 사회환경시스템공학과) ;
  • 안재훈 (부산대학교 사회환경시스템공학과)
  • Received : 2022.05.02
  • Accepted : 2022.06.16
  • Published : 2022.06.30
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Abstract

Permeable pavement technology allows the penetration of rainfall into the roadbed, thereby reducing surface runoff and enhancing water quality. The water quality can be improved by adding a filter layer to the permeable pavement. This study analyzes the permeability performance and particulate-matter removal efficiency of a bottom ash-silica sand filter. The performances of five filters with bottom ash and silica sand as the basic materials were evaluated on particulate matter sized 60 ㎛ or smaller. The pure silica sand sample and pure bottom ash sample delivered an average removal efficiency of around 70%. The removal efficiency of the mixed sample was approximately 90%, exceeding the recommended reduction rate (80%) at non-point pollution reduction facilities. In future work, the filter performance should be further verified on permeable pavement.

투수성 포장은 강우를 노반으로 침투시켜 지표면 유출량 감소와 수질 개선을 기대하기 위한 기술이다. 수질 개선효과의 증대를 위해 투수성 포장 내에는 필터층을 추가하기도 한다. 본 연구에서는 투수성 포장의 구성 요소인 여재 필터의 성능을 알아보기 위해 석탄 저회-규사 여재에 대한 투수성능과 입자상 물질 제거 효율을 분석하였으며, 석탄저회와 규사를 기본 재료로 하는 5개의 여재를 대상으로 하였고, 입자상 물질로는 60㎛ 이하의 입자를 사용하였다. 순수 규사 시료 혹은 순수 석탄저회 시료는 평균적으로 약 70%의 입자상 물질 제거효율을 보였으나, 혼합 시료의 경우 제거 효율이 약 90%로서, 비점오염 저감시설에 대한 저감율 권고치인 80%를 상회하는 것으로 나타났다. 향후 현장 검증을 통한 투수성 포장 내 여재 필터 성능에 대한 검증 후 도로 시설 혹은 독립적인 여과 장치로 사용할 수 있을 것으로 판단한다.

Keywords

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