Comparing field investigations with laboratory models to predict landfill leachate emissions

Fellner, Johann; Döberl, Gernot; Allgaier, Gerhard; Brunner, Paul H.

doi:10.1016/j.wasman.2008.12.022

Cited by 75 publications

(34 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This apparently indicates a highly preferential flow system. This is consistent with the mobile porosities reported by Fellner et al (2009) and Rosqvist & Destouni (2000). The block diffusion times (t cb s) are plotted against the compressive stress in Figure 5.…”

Section: Simulation Of Bromide Breakthroughsupporting

confidence: 87%

“…There have been several studies which have found that diffusion to and from less mobile parts of the waste is an important transport mechanism (Bendz and Singh, 1999;Döberl et al, 2003;Rosqvist and Destouni, 2000;Woodman, 2007). These studies are supported by a broad evidence base as to the existence (albeit not the precise nature) of preferential flow (Bengtsson et al, 1994;Blakey, 1982;Ehrig, 1983;Fellner et al, 2009;Stegmann and Ehrig, 1989;Straub and Lynch, 1982).…”

Section: Simulationmentioning

confidence: 91%

See 1 more Smart Citation

Investigating the effect of compression on solute transport through degrading municipal solid waste

et al. 2014

View full text Add to dashboard Cite

The effect of applied compression on the nature of liquid flow and hence the movement of contaminants within Municipal Solid Waste was examined by means of thirteen tracer tests conducted on five separate waste samples. The conservative nature of bromide, lithium and deuterium tracers was evaluated and linked to the presence of degradation in the sample. Lithium and deuterium tracers were non-conservative in the presence of degradation, whereas the bromide remained effectively conservative under all conditions. Solute diffusion times into and out of less mobile blocks of waste were compared for each test under the assumption of dominantly dual-porosity flow. Despite the fact that hydraulic conductivity changed strongly with applied stress, the block diffusion times were found to be much less sensitive to compression. A simple conceptual model, whereby flow is dominated by sub-parallel low permeability obstructions which define predominantly horizontally aligned less mobile zones, is able to explain this result. Compression tends to narrow the gap between the obstructions, but not significantly alter the horizontal length scale. Irrespective of knowledge of the true flow pattern, these results show that simple models of solute flushing from landfill which do not include depth dependent changes in solute transport parameters are justified.

show abstract

Section: Simulation Of Bromide Breakthroughsupporting

confidence: 87%

Section: Simulationmentioning

confidence: 91%

Investigating the effect of compression on solute transport through degrading municipal solid waste

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Dotty plots for all three tracers for t cb and θ m are shown in (Fellner et al, 2009) and0.05-0.47 (Rosqvist andDestouni, 2000). Although both these studies examined both field and laboratory data, they were inconsistent in how β changes with scale.…”

Section: Uncertainty In Parameters Of Dp Modelmentioning

confidence: 99%

Multiple-tracer tests for contaminant transport process identification in saturated municipal solid waste

et al. 2015

View full text Add to dashboard Cite

Two column tests were performed in conditions emulating vertical flow beneath the leachate table in a biologically active landfill to determine dominant transport mechanisms occurring in landfills. An improved understanding of contaminant transport process in wastes is required for developing better predictions about potential length of the long term aftercare of landfills, currently measured in timescales of centuries. Three tracers (lithium, bromide and deuterium) were used. Lithium did not behave conservatively. Given that lithium has been used extensively for tracing in landfill wastes, the tracer itself and the findings of previous tests which assume that it has behaved conservatively may need revisiting.The smaller column test could not be fitted with continuum models, probably because the volume of waste was below a representative elemental volume. Modelling compared advection-dispersion (AD), dual porosity (DP) and hybrid AD-DP models. Of these models, the DP model was found to be the most suitable. Although there is good evidence to suggest that diffusion is an important transport mechanism, the breakthrough curves of the different tracers did not differ from each other as would be predicted based

show abstract

“…The temperature (T) is assumed equal to 35°C which corresponds roughly with the conditions prevailing inside the landfill, where temperatures between 22 and 46°C were measured (Fellner et al 2009). …”

Section: Biotic Consumption and Vapor Lossesmentioning

confidence: 99%

A new screening model for leachate production assessment at landfill sites

Pantini

Verginelli

Lombardi

2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

This paper presents an alternative water balance model for predicting leachate production in landfills, from the operative to the post-closure management. The developed model, based on analytical and empirical equations, provides a quantitative estimation of leachate volumes, using a water balance approach which accounts for the different rates of the incoming water, water losses and water consumption. Aging and compression are also included, allowing to assess the progressive variation of hydraulic and physical properties of deposited wastes. In this work, after a brief description of the model architecture, different applications to hypothetical scenarios and to a real landfill are presented. Namely, in order to highlight how aging and biodegradation can influence the expected leachate production, the results of the developed model are also compared with those provided by the Hydrologic Evaluation of Landfill Performance model which neglects both these processes. The obtained results showed that wastes compression may affect leachate prediction in a large extent during operative stage of a landfill, and neglecting these processes could lead to underestimation up to one order of magnitude. Also biodegradation of waste organic matter may result relevant for leachate volumes assessment, influencing water storage capacity of wastes and leading to a leachate production 2-3 times greater than those obtained neglecting these phenomena. Finally, the application of the developed model to the real landfill shows a quite good agreement with the field data, whereas the Hydrologic Evaluation of Landfill Performance model tends to underestimate the leachate volumes with errors up to 80 %.

show abstract

Comparing field investigations with laboratory models to predict landfill leachate emissions

Cited by 75 publications

References 23 publications

Investigating the effect of compression on solute transport through degrading municipal solid waste

Investigating the effect of compression on solute transport through degrading municipal solid waste

Multiple-tracer tests for contaminant transport process identification in saturated municipal solid waste

A new screening model for leachate production assessment at landfill sites

Contact Info

Product

Resources

About