Authors / CoAuthors
Xie, Yuekai | Xue, Jianfeng | Deane, A.
Abstract
This paper presents the development of a new settlement model to predict the long-term settlement of municipal solid wastes (MSWs). The total settlement of the MSWs results from the direct loss of solids due to decomposition and compression due to stress variation induced by loss of solids, flow of gas and liquid and mechanical creep. The geotechnical properties of MSWs are considered as functions of degrees of biodegradation (DOB). To validate the model, two settlement profilers (2.5 years) and three geodetic monitoring networks (2 years) were installed at Mugga Lane Landfill, ACT, Australia to monitor the settlement of an MSW lift and three closed landfill cells, respectively. The settlement rates of the landfill cells with the ages of 7, 8, 14, and 8, 9 and 15 years are 0.53, 0.35, 0.06 and 0.46, 0.36, 0.05 mm/day, respectively. In addition, 5 large scale and 3 small scale bioreactors were set up in the field and laboratory to address the long-term physical, mechanical and biochemical behaviours of the MSWs under different stress levels. The predicted settlement is compared to the test results from the bioreactors, in-situ monitoring data and the settlement predicted using an existing model, which has been improved by coupling the geotechnical properties of MSWs with DOBs. The predicted settlement using the proposed model well fits the test results and monitoring data. The settlement strain is predicted to be 28.2 % during the filling stage of the landfill and 5.9 % in 5 years after the closure. <b>Citation:</b> Yuekai Xie, Jianfeng Xue, Alistair Deane, Numerical modelling of settlement of municipal solid waste in landfills coupled with effects of biodegradation, <o>Waste Management</i>, Volume 163, 2023, Pages 108-121, ISSN 0956-053X, https://doi.org/10.1016/j.wasman.2023.03.025.
Product Type
document
eCat Id
147269
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
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Keywords
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- biodegradation
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- municipal solid waste
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- settlement
- theme.ANZRC Fields of Research.rdf
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- Geospatial information systems and geospatial data modelling
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- mechanical creep
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- global navigation satellite system - GNSS
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- Published_External
Publication Date
2024-09-03T01:10:04
Creation Date
2022-09-30T20:00:00
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Status
completed
Purpose
Scientific manuscript.
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asNeeded
Topic Category
geoscientificInformation
Series Information
Waste Management Volume 163 , 15 May 2023 108-121
Lineage
Manuscript to be submitted to Waste Management Journal
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Extents
[-54.75, -9.2402, 112.92, 159.11]
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