Hydraulic Conductivity of MSW in Landfills

Reddy, Krishna R.; Hettiarachchi, Hiroshan; Parakalla, Naveen S.; Gangathulasi, Janardhanan; Bogner, J.; Lagier, Thomas

doi:10.1061/(asce)ee.1943-7870.0000031

Cited by 103 publications

(44 citation statements)

References 7 publications

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“…This is in agreement with Reddy et al (2009c) who stated that the decrease in permeability in aged MSW is attributed to the increase in the smaller particles resulting from degradation. Hossain et al (2006) also concluded that with degradation the MSW structure will change and the MSW particles break down leading to a decrease in the MSW void ratio and thus a decrease in the MSW permeability.…”

Section: Permeability Testssupporting

confidence: 94%

“…The permeability of MSW not only varies significantly with the factors such as waste composition, compaction and overburden stress applied to the waste fill but also with the extension of the degradation process, which results in significant changes in the composition and size distribution of the waste components (Reddy et al, 2009c).…”

Section: Permeability Testsmentioning

confidence: 99%

“…According to recent regulation for designing of landfills, leachate produced inside the landfill body must be collected and therefore the installation of leachate collection and removal systems is necessary. The MSW permeability is an important parameter in the design of adequate drainage systems (Reddy et al, 2009c).…”

Section: Permeability Testsmentioning

confidence: 99%

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Evaluation of the geotechnical properties of MSW in two Brazilian landfills

et al. 2010

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The characteristics of municipal solid waste (MSW) play a key role in many aspects of waste disposal facilities and landfills. Because most of a landfill is made up of MSW, the overall stability of the landfill slopes are governed by the strength parameters and physical properties of the MSW. These parameters are also important in interactions involving the waste body and the landfill structures: cover liner, leachate and gas collection systems. On the other hand, the composition of the waste, which affects the geotechnical behavior of the MSW, is dependent on a variety of factors such as climate, disposal technology, the culture and habits of the local community. It is therefore essential that the design and stability evaluations of landfills in each region be performed based on the local conditions and the geotechnical characteristic of the MSW. The Bandeirantes Landfill, BL, in São Paulo and the Metropolitan Center Landfill, MCL, in Salvador, are among the biggest landfills in Brazil. These two disposal facilities have been used for the development of research involving waste mechanics in recent years. Considerable work has been made in the laboratory and in the field to evaluate parameters such as water and organic contents, composition, permeability, and shear strength. This paper shows and analyzes the results of tests performed on these two landfills. The authors believe that these results could be a good reference for certain aspects and geotechnical properties of MSW materials in countries with similar conditions.

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Section: Permeability Testssupporting

confidence: 94%

Section: Permeability Testsmentioning

confidence: 99%

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Evaluation of the geotechnical properties of MSW in two Brazilian landfills

et al. 2010

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“…These advantages include: (1) protection to the environment, (2) increased potential for energy production from LFG, (3) in-situ treatment and recirculation of leachate leading to reduced treatment cost, (4) greater stabilization rates allowing more storage due to increased density, (5) increased rate of decomposition shortening post-closure monitoring period, and (6) increased sustainability allowing possible reuse of the land [7][8][9]. Recirculating leachate turns the dry-tomb landfill into a bioreactor landfill [10,11]. Higher rates of leachate recirculation accelerate waste degradation.…”

Section: Landfill Treatmentsmentioning

confidence: 99%

Treatment of landfill waste, leachate and landfill gas: A review

Omar

Rohani

2015

Front. Chem. Sci. Eng.

115

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This review aims at the treatment of the entire landfill, including the waste mass and the harmful emissions: leachate and landfill gas. Different landfill treatments (aerobic, anaerobic and semi-aerobic bioreactor landfills, dry-tomb landfills), leachate treatments (anaerobic and aerobic treatments, anammox, adsorption, chemical oxidation, coagulation/flocculation and membrane processes) and landfill gas treatments (flaring, adsorption, absorption, permeation and cryogenic treatments) are reviewed. Available information and the gaps present in current knowledge is summarized. The most significant areas to expand are landfill waste treatments, which in recent years has begun to grow but there is an opportunity for much more. Another area to explore is the treatment of landfill gas, a very large field to which not much effort has been put forth. This review is to compare different treatment methods and give direction to future research.

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“…Therefore, two different sets of dilatancy indices have to be used in these two different drainage conditions. According to Oweis et al (1990), Reddy et al (2009) and Beaven et al (2011), the hydraulic conductivity of MSW varies from 10 −2 to 10 −6 cm/s with the influence of the degree of compaction, age, degree of decomposition, gas content and temperature. Usually, almost no pore-water pressure should develop, as liquid can rapidly escape from the landfill mass, and primary settlement will occur rather quickly in a completed landfill (Gomes et al, 2014;Wall and Zeiss, 1995).…”

Section: The Dilatancy Behaviour Of Mswmentioning

confidence: 99%

Non-linear elastic model for MSW considering dilatancy effect

KeHan

ChenYun-min

DongDing

et al. 2019

Environmental Geotechnics

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Study of the stress-strain behaviour of municipal solid waste (MSW) is important in landfill design and management. Non-linear elastic constitutive models are usually in a simple form and convenient in engineering applications; however, most existing non-linear elastic models do not adequately consider the dilatancy behaviour, which has a significant influence on the strength and deformation behaviours of MSW. In this paper, a non-linear elastic model for the prediction of stress-strain behaviour of MSW is proposed based on the results of consolidated drained triaxial compression tests. The influence of dilatancy behaviour is identified and highlighted. The generalised shear stress can be normalised well by dividing the shear stress by the power function of the mean normal stress. Total expressions of normalised volumetric strain and generalised shear strain were established, and the dilatancy modulus and hardening modulus of the proposed model were obtained. The proposed model was used to simulate test results obtained from both published studies and the authors' laboratory testing. The simulation results were in good agreement with the experimental values in general, although deviations were observed in the simulations of volumetric strain or shear stress for the high-dispersion characteristics of MSW. Notation

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Hydraulic Conductivity of MSW in Landfills

Cited by 103 publications

References 7 publications

Evaluation of the geotechnical properties of MSW in two Brazilian landfills

Evaluation of the geotechnical properties of MSW in two Brazilian landfills

Treatment of landfill waste, leachate and landfill gas: A review

Non-linear elastic model for MSW considering dilatancy effect

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