Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Treatment of Acid Mine Drainage Using Immobilized Beads Carrying Sulfate Reducing Bacteria

황산염환원균 고정화 담체를 이용한 산성광산배수 처리

  • Kim, Gyoung-Man (Division of Environmental & Geosystem Engineering, Kangwon National University) ;
  • Hur, Won (Department of Bioengineering and Technology, Kangwon National University) ;
  • Baek, Hwan-Jo (Division of Environmental & Geosystem Engineering, Kangwon National University)
  • 김경만 (강원대학교 지구환경공학부) ;
  • 허원 (강원대학교 생물공학과) ;
  • 백환조 (강원대학교 지구환경공학부)
  • Published : 2008.02.28
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Abstract

The application of constructed subsurface-flow wetlands for treatment of wastewater from abandoned mines is being increased. Crushed limestone, oak chips, and mushroom composites are often employed in a bulk form, as the substrates in the bed media. Efficiency of the subsurface-flow treatment system drops with time as the hydraulic conductivity of the wetland soil decreases significantly, presumably due to chemical reactions with the wastewater. The purpose of this study is to investigate the applicability of immobilized beads carrying sulfate reducing bacteria for acid mine drainage treatment system. The ingredients of immobilized beads are organic materials such as mushroom composite and oak chips, limestone powder for a pH buffer, mixed with a modified Coleville Synthetic Brine. It was found that immobilized beads are more efficient than the bulk form for pH recovery, sulfate and heavy metal removal.

휴폐광지역의 산성광산배수를 처리하기 위한 자연정화처리시설로서 소택지의 설치가 증가하고 있다. 이러한 소택지의 기질물질로서는 흔히 석회석, 참나무조각, 버섯퇴비 등이 벌크형태로 적용된다. 이러한 소택지의 정화효율은 시간이 지남에 따라 점차 저하되며, 특히 산성배수와의 화학반응에 의한 기질물질 층의 투수계수 감소에 주로 기인한 것으로 파악된다. 본 연구의 목적은 산성광산배수 처리시설에서 황산염환원균(SRB) 고정화 담체의 적용성을 평가하기 위한 것이다. 고정화담체는 유기물질인 버섯퇴비와 참나무 퇴비, pH 완충제인 석회석가루 등을 토양미생물을 접종한 m-CSB와 혼합하여 제작하였다. 본 실험에서 고정화담체는 벌크형태에 비하여 pH, 황산염제거율 및 중금속 제거율에서 효율이 우수함을 확인할 수 있었다.

Keywords

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