Saturated Hydraulic Conductivity of Municipal Solid Waste Considering the Influence of Biodegradation
Publication: Journal of Environmental Engineering
Volume 144, Issue 9
Abstract
Municipal solid waste (MSW) permeability is influenced mainly by compaction, unit weight, overburden pressure, composition, and biodegradation of the waste. However, the variation of hydraulic conductivity with MSW biodegrading over time has not yet been sufficiently studied, and consequently not fully understood. This study aimed to present the saturated hydraulic conductivity () of the MSW, considering the influence of anaerobic biodegradation, by using two large-scale rigid wall permeameters (P1 and P2) in two experimental groups. The leachate produced was subjected to physicochemical analysis. The MSW confined in both permeameters presented similar gravimetric composition and total mass but diverse initial unit weight, ranging from 4.9 to . Maximum and minimum values of obtained for the confined MSW were and , respectively. Physicochemical analysis indicated that MSW biodegradation in permeameters remained in the anaerobic acid phase. The methodology adopted for the permeability tests influenced the MSW biodegradation, and consequently its hydraulic behavior. It is believed that, during 7 days before the permeability tests, the drained gas changed the MSW mass structure into the permeameters and the values over time. Within the permeameters with higher unit weight MSW, the values increased for up to 3 months, tending to stabilization.
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Acknowledgments
The authors would like to acknowledge Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (Process No. 2010/18560-4), Consórcio Renova Ambiental, Maccaferri do Brasil Ltda, and the City Hall of Campinas for supporting this research.
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Sep 11, 2017
Accepted: Mar 27, 2018
Published online: Jun 28, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 28, 2018
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