Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Analyses of Settlement Characteristics Evaluating the Applicability of Bioreactor Landfills on MSW Landfills

바이오리액터 매립공법의 폐기물 매립지에 적용가능성 평가를 위한 침하특성 분석

  • Jo, Young-Seok (Dept. of Civil and Environmental Engrg., Dongguk Univ.) ;
  • Jang, Yeon-Soo (Dept. of Civil and Environmental Engrg., Dongguk Univ.)
  • 조영석 (동국대학교 건설환경공학과) ;
  • 장연수 (동국대학교 건설환경공학과)
  • Received : 2020.03.30
  • Accepted : 2020.05.04
  • Published : 2020.05.31
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Abstract

In order to analyze the effect of applying the bioreactor landfills on the waste landfill for acceleration of waste biocompression, a settlement experiment was performed. The secondary compression indices (Cα) were analyzed, and compared with the results of experimental studies conducted in other countries. Analyses of Cα from the experiment showed that the recirculation method of mixing leachate and FWL could accelerate the waste settlement as much as 2.9 times and 2 times more than the leachate recirculation and the sanitary landfills due to additional biocompression generated by the organic matter in FWL. The Cα in this study was smaller than the Cα of the other studies due to the low organic content of the waste in accordance with domestic waste policies to reduce food waste. The relation between biodegradable waste content and Cα was analyzed. The Cα of the waste was shown to be sensitive to biodegradable waste content, and become higher as the content of the biodegradable waste increases.

폐기물 매립지에 바이오리액터 매립공법을 적용하는 것이 폐기물의 생물학적 압축 촉진에 미치는 영향을 분석하기 위하여 실내침하실험을 수행하고, 그 결과 구한 2차 압축지수(Cα)를 국외연구결과와 비교하였다. 실내침하실험의 2차 압축지수들을 분석한 결과 침출수에 음폐수를 혼합하여 재순환하는 방법은 음폐수 내 유기물질이 추가적인 생물학적 압축을 유발하며 침출수 재순환과 위생매립공법보다 폐기물 침하를 각 2배, 2.81배 가속화할 수 있는 것으로 나타났다. 본 연구에서 사용한 폐기물의 2차 압축지수는 국외연구 폐기물의 2차 압축지수보다 작았는데 그 이유는 음식물 쓰레기를 감소시키기 위한 국내 폐기물 정책에 따라 폐기물 내 유기물 함량이 감소하였기 때문이다. 생분해성 폐기물 함량과 2차 압축지수의 관계를 분석한 결과 폐기물의 2차 압축지수는 생분해성 폐기물 함량에 민감하며 생분해성 폐기물 함량이 증가할수록 커지는 것으로 나타났다.

Keywords

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