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2022 Vol.38, Issue 6 Preview Page

Research Article

Experimental Evaluation of Particulate-matter Filtration Performance of a Bottom Ash-Silica Sand Mixture

석탄 저회-규사 필터의 입자상물질 여과 성능 실험적 평가

Dong-Hyun Lee1
,
Hong-Kyoung Lee2
,
Yun-Jae Lee3
,
Jaehun Ahn4*
이 동현1
,
이 홍경2
,
이 윤제3
,
안 재훈4*
1Member, Graduate Student, Dept. of Civil and Environmental Engrg., Pusan National Univ.
2President, Neotech. Co. Ltd.
3Member, Graduate Student, Dept. of Civil and Environmental Engrg., Pusan National Univ.
4Member, Prof., Dept. of Civil and Environmental Engrg., Pusan National Univ.
1정회원, 부산대학교 사회환경시스템공학과 석사과정
2비회원, ㈜네오테크 대표이사
3정회원, 부산대학교 사회환경시스템공학과 박사과정
4정회원, 부산대학교 사회환경시스템공학과 교수
*Corresponding Author
30 June 2022. pp. 41-47
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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 μm 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.

Keywords
Bottom ash
Non-point pollution reduction facilities
Permeable pavement
Silica sand

투수성 포장은 강우를 노반으로 침투시켜 지표면 유출량 감소와 수질 개선을 기대하기 위한 기술이다. 수질 개선 효과의 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, 석탄 저회와 규사를 기본 재료로 하는 5개의 여재를 대상으로 하였고, 입자상 물질로는 60μm 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.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 38
  • No :6
  • Pages :41-47
  • Received Date : 2022-05-25
  • Revised Date : 2022-06-15
  • Accepted Date : 2022-06-16
  • DOI :https://doi.org/10.7843/kgs.2022.38.6.41
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