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The Physical Clogging of the Landfill Leachate Collection System in China: Based on Filtration Test and Numerical Modelling
- Source :
- International Journal of Environmental Research and Public Health; Volume 15; Issue 2; Pages: 318, International Journal of Environmental Research and Public Health, Vol 15, Iss 2, p 318 (2018), International Journal of Environmental Research and Public Health
- Publication Year :
- 2018
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2018.
-
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.
- Subjects :
- China
Municipal solid waste
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
lcsh:Medicine
clogging
02 engineering and technology
010501 environmental sciences
Solid Waste
01 natural sciences
Article
law.invention
Clogging
landfill leachate
Hydraulic conductivity
law
leachate collection system (LCS)
particulate matter
numerical simulation
Geotextile
Leachate
Particle Size
Filtration
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Total suspended solids
lcsh:R
Public Health, Environmental and Occupational Health
Environmental engineering
Particulates
Refuse Disposal
Waste Disposal Facilities
Environmental science
Water Pollutants, Chemical
Subjects
Details
- Language :
- English
- ISSN :
- 16604601
- Database :
- OpenAIRE
- Journal :
- International Journal of Environmental Research and Public Health; Volume 15; Issue 2; Pages: 318
- Accession number :
- edsair.doi.dedup.....1b70d50bc55b913a59c4392c3b37d2e1
- Full Text :
- https://doi.org/10.3390/ijerph15020318