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2021 Vol.26, Issue 1 Preview Page
Long Term Affecting Factors on Major Water Quality Items of Landfill Leachate

매립장 침출수 주요 수질항목에 대한 장기 영향요소

Seung-Kyu Chun1
,
Min Hyuk Kim2
,
Jong Chul Won2*
천 승규1
,
김 민혁2
,
원 종철2*
1Graduate School of Energy & Environment, Seoul National University of Science & Technology, Seoul 01811, Korea
2Water Environmental Management Division, SUDOKWON Landfill Site Management Corporation, Incheon 22688, Korea
1서울과학기술대학교 에너지환경대학원
2수도권매립지관리공사 물환경처
*Corresponding Author
28 February 2021. pp. 24-33
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Abstract

Analysis of long term affecting factors on water quality items of gas emission form (BOD, COD) and leachate emission form (T-N, non-bio-degradable COD (NBDCOD)) was performed for the SUDOKWON 1st Landfill Site (LS1) and 2nd Landfill Site (LS2). As landfill gas was generated, BOD and COD decreased from 6,887 and 20,025 mg/L in 1993 to 49.5 and 670.2 mg/L in 2019, respectively. TN and NBDCOD increased with waste decomposition but gradually decreased after landfill closure because of the precipitation infiltration effect. Due to the drastic decline of carbon in the leachate, the BOD/TN ratios of LS1 and LS2 declined from 13.0 and 17.0 during early stage of the landfill to 0.07 and 0.16 in 2019, respectively; LS2 and NBDCOD/COD increased from 0.25 to 0.65 during the same period. These conditions caused carbon deficiency in denitrification treatment and a chemical post-treatment request for NBDCOD. The different behaviors of gas emission and leachate emission items suggest the necessity of different strategic approaches in the long term perspective.

Keywords
Leachate
Landfill gas
BOD
COD
T-N
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Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 26
  • No :1
  • Pages :24-33
  • Received Date : 2020-11-26
  • Revised Date : 2020-12-27
  • Accepted Date : 2021-02-02
  • DOI :https://doi.org/10.7857/JSGE.2021.26.1.024
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