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The Physical Clogging of the Landfill Leachate Collection System in China: Based on Filtration Test and Numerical Modelling

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Listed:
  • Yili Liu

    (Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, School of Environment, Tsinghua University, Beijing 100084, China)

  • Weixin Sun

    (Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, School of Environment, Tsinghua University, Beijing 100084, China)

  • Bing Du

    (Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, School of Environment, Tsinghua University, Beijing 100084, China)

  • Jianguo Liu

    (Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, School of Environment, Tsinghua University, Beijing 100084, China)

Abstract

Clogging of the leachate collection system (LCS) has been a common operation problem in municipal solid waste (MSW) landfills in China, which can result in high water levels that threaten the safety of landfill operations. To determine the cause of failure in an LCS, raw leachate from a municipal solid waste transfer station was collected and the high content of particulate matter was characterized. Based on the parameters obtained in a filtration test, a numerical simulation was performed to estimate the influence of particle deposition on drainage system clogging. The results showed that LCSs were confronted with the risk of clogging due to the deposition of particulate matter resulting from the higher concentration of total suspended solids (TSS level > 2200 mg L −1 ) and larger particle size (>30% TSS particles > 15 μm) in the leachate. On one hand, the non-woven geotextile, as the upper layer of the LCS, retained most particulate matter of large diameters, reducing its hydraulic conductivity to approximately 10 −8 to 10 −9 m s −1 after 1–2 years of operation and perching significant leachate above it (0.6–0.7 m). On the other hand, the geotextile prevented the gravel layer from physically clogging and minimized the leachate head above the bottom liner. Therefore, the role of geotextile should be balanced to optimize the LCS in MSW landfills in China.

Suggested Citation

  • Yili Liu & Weixin Sun & Bing Du & Jianguo Liu, 2018. "The Physical Clogging of the Landfill Leachate Collection System in China: Based on Filtration Test and Numerical Modelling," IJERPH, MDPI, vol. 15(2), pages 1-15, February.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:2:p:318-:d:131563
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    References listed on IDEAS

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    1. Ren Peng & Yujing Hou & Liangtong Zhan & Yangping Yao, 2016. "Back-Analyses of Landfill Instability Induced by High Water Level: Case Study of Shenzhen Landfill," IJERPH, MDPI, vol. 13(1), pages 1-17, January.
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    Cited by:

    1. Yili Liu & Jianguo Liu, 2020. "The BioChemical Clogging of Landfill Leachate Collection System: Based on Laboratory Studies," IJERPH, MDPI, vol. 17(7), pages 1-14, March.

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