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Experimental study of the intrinsic permeability of municipal solid waste

Experimental study of the intrinsic permeability of municipal solid waste
Experimental study of the intrinsic permeability of municipal solid waste
Changing patterns of municipal solid waste (MSW) management, for example sorting for recycling and mechanical–biological treatment (MBT), will change the nature of the residual material going to landfill and in particular its intrinsic permeability. This is an important parameter, not least because of its influence on gas and leachate flows and the ramifications for gas and leachate management. This paper reports the results of laboratory permeability tests on specimens of MSW recovered from boreholes drilled in a Chinese landfill, under both liquid and gas flow. The test results are used to assess the intrinsic permeability of the waste, and are compared with corresponding data from raw and MBT municipal solid wastes from developed countries in the context of differences in waste composition, porosity and particle size. For the Chinese waste, the intrinsic permeability decreased with depth, while at a given depth the permeability determined with gas flow was consistently larger than that determined with liquid flow. Intrinsic permeabilities determined in liquid flow showed no clear trend of variation with effective particle diameter d10, but reduced with drainable porosity (the drainable porosity, ne, being a more appropriate and useful measure than the total porosity, n). Conversely, intrinsic permeabilities determined in gas flow showed a clear decrease with decreasing d10, but no consistent variation with porosity. These differences are potentially significant in assessing the impacts and interactions between gas and liquid flows; some reasons for them are suggested.
0956-053X
304-311
Xu, Xiao Bing
7b5d1781-77a4-4ecc-b931-853b8a0b30ae
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Zhang, Wen Jie
d37ffd39-7268-4d37-8298-14e95c1056fb
Holmes, David Stuart
562e20f0-538e-4b0a-9486-2b0ee80654ad
Xu, Hui
96eca9d1-97fc-42d1-9c89-75f5efdd3a99
Beaven, Richard
5893d749-f03c-4c55-b9c9-e90f00a32b57
Xu, Xiao Bing
7b5d1781-77a4-4ecc-b931-853b8a0b30ae
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Zhang, Wen Jie
d37ffd39-7268-4d37-8298-14e95c1056fb
Holmes, David Stuart
562e20f0-538e-4b0a-9486-2b0ee80654ad
Xu, Hui
96eca9d1-97fc-42d1-9c89-75f5efdd3a99
Beaven, Richard
5893d749-f03c-4c55-b9c9-e90f00a32b57

Xu, Xiao Bing, Powrie, William, Zhang, Wen Jie, Holmes, David Stuart, Xu, Hui and Beaven, Richard (2020) Experimental study of the intrinsic permeability of municipal solid waste. Waste Management, 102, 304-311. (doi:10.1016/j.wasman.2019.10.039).

Record type: Article

Abstract

Changing patterns of municipal solid waste (MSW) management, for example sorting for recycling and mechanical–biological treatment (MBT), will change the nature of the residual material going to landfill and in particular its intrinsic permeability. This is an important parameter, not least because of its influence on gas and leachate flows and the ramifications for gas and leachate management. This paper reports the results of laboratory permeability tests on specimens of MSW recovered from boreholes drilled in a Chinese landfill, under both liquid and gas flow. The test results are used to assess the intrinsic permeability of the waste, and are compared with corresponding data from raw and MBT municipal solid wastes from developed countries in the context of differences in waste composition, porosity and particle size. For the Chinese waste, the intrinsic permeability decreased with depth, while at a given depth the permeability determined with gas flow was consistently larger than that determined with liquid flow. Intrinsic permeabilities determined in liquid flow showed no clear trend of variation with effective particle diameter d10, but reduced with drainable porosity (the drainable porosity, ne, being a more appropriate and useful measure than the total porosity, n). Conversely, intrinsic permeabilities determined in gas flow showed a clear decrease with decreasing d10, but no consistent variation with porosity. These differences are potentially significant in assessing the impacts and interactions between gas and liquid flows; some reasons for them are suggested.

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Accepted/In Press date: 21 October 2019
e-pub ahead of print date: 25 November 2019
Published date: February 2020

Identifiers

Local EPrints ID: 438526
URI: http://eprints.soton.ac.uk/id/eprint/438526
ISSN: 0956-053X
PURE UUID: 8b394c15-01b6-4105-892d-a27f1229ab0f
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826
ORCID for Richard Beaven: ORCID iD orcid.org/0000-0002-1387-8299

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Date deposited: 12 Mar 2020 17:34
Last modified: 07 Oct 2020 01:39

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