Mass loading and the rate of clogging due to municipal solid waste leachate

Rowe, R. Kerry; Armstrong, M.; Cullimore, D. R.

doi:10.1139/cgj-37-2-355

Cited by 14 publications

(21 citation statements)

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“…Column experiments with real or synthetic landfill leachate, performed to observe clogging, have shown that the anaerobic bacteria in the leachate easily colonize the surfaces of drainage materials and form a thick biofilm (Brune et al 1991;Paksy et al 1995Paksy et al , 1998Peeling et al 1999;Rowe et al 2000aRowe et al , 2000bRowe et al , 2002VanGulck andRowe 2004a, 2004b). Rowe et al (2000aRowe et al ( , 2000b found that the bacteria included methanogens, denitrifying bacteria, and sulfate-reducing bacteria. Paksy et al (1995) concluded that the bacterial populations remove volatile fatty acids (VFAs) from the leachate, and the growth of these bacteria results in a decrease in drainable pore volume of the drainage material.…”

Section: Background and Rationalementioning

confidence: 99%

“…High concentrations of suspended bacteria (sometimes measured as volatile suspended solids (VSS)) have been found in landfill leachate and in the influent and effluent of column experiments simulating leachate clogging (Brune et al 1991;Rowe et al 2000aRowe et al , 2000bVanGulck and Rowe 2004a). In columns containing 6 mm glass beads and permeated with landfill leachate, VanGulck and Rowe (2004a) found that 60%-95% of the influent VSS was removed (by attachment).…”

Section: Background and Rationalementioning

confidence: 99%

“…As part of a decade-long study of the clogging of LCSs, the authors and their collaborators have been developing (i) a numerical model for clogging processes; (ii) experimental data based on controlled column tests (Rowe et al 2000a(Rowe et al , 2000b(Rowe et al , 2002VanGulck andRowe 2004a, 2004b) to provide insight regarding the mechanisms to be modelled and to verify the model; and (iii) mesocosm (laboratory-cell) tests that simulate, in real time and at a realistic scale, the clogging process in LCSs (Rowe et al 1995;Fleming et al 1999;Fleming and Rowe 2003) over a period of up to 10 years.…”

Section: Introductionmentioning

confidence: 99%

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Modelling species fate and porous media effects for landfill leachate flow

Cooke¹,

Rowe²,

Rittmann³

2005

Can. Geotech. J.

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A numerical, multiple-species, reactive transport model, coupled to models of kinetic biodegradation, precipitation, and particle attachment and detachment for predicting landfill leachate-induced clogging in porous media for one-dimensional flow systems, is described. The finite-element method is used for transport modelling, with reactions incorporated into point-source or sink terms. The species modelled include three volatile fatty acids, active and inert suspended biomass, dissolved calcium, and inorganic particles. The clog matter consists of active biofilm, inert biofilm, and inorganic solids. A biofilm model is used to simulate the growth and decay of active biomass and removal of substrate. Precipitate accumulation and calcium removal are simulated by a model of calcium carbonate precipitation. Interphase movement between clog matter and fluid includes the processes of attachment and detachment. A geometric representation of the porous media allows porosity and specific surface to be estimated from the thickness of the accumulated clog matter. The porosity of the media can thus change spatially and temporally. The behaviour of the model is demonstrated with a hypothetical example.Key words: clogging, landfills, leachate collection systems, modelling, biofilms, mineral precipitation.

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Section: Background and Rationalementioning

confidence: 99%

Section: Background and Rationalementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modelling species fate and porous media effects for landfill leachate flow

Cooke¹,

Rowe²,

Rittmann³

2005

Can. Geotech. J.

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“…Since the abundance of microorganism in landfill leachate and inter-particle space of clay mineral in CCLs, the bio-clogging would occur (Rowe et al, 2000(Rowe et al, , 2002VanGulck et al, 2003). During the operation period of a landfill site, the bottom clay liners will be exposed to the leachate directly.…”

Section: Introductionmentioning

confidence: 99%

“…During the operation period of a landfill site, the bottom clay liners will be exposed to the leachate directly. The presence of biofilms and associated bio-clogging mechanisms controlled by the relative size of microorganisms can significantly reduce the hydraulic conductivity of the CCL (Rowe et al, 2000(Rowe et al, , 2002VanGulck et al, 2003). Additionally, as the bottom liner material, the clay should remain an excellent barrier performance in hydraulic behavior as well as its filtration performance.…”

Section: Introductionmentioning

confidence: 99%

Long-term hydraulic conductivity of compacted clay permeated with landfill leachates

Tang

Wang

Chen

et al. 2016

JGS Special Publication

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This paper studies the effects of bio-clogging on hydraulic conductivity of compacted soils used as landfill liners. Landfill leachate contains a large amount of microorganism and bacterial biomass, which was likely to cause bio-clogging in landfill liners. To interpret the effect of bio-clogging on hydraulic property of compacted clays, in this study, a series of laboratory-scale hydraulic conductivity tests were conducted. The long term hydraulic conductivity of compacted clays was measured with distilled water, landfill leachate and one type of nutrient solution. The laboratory test results show that the hydraulic conductivity of compacted clays permeated with distilled water stabilized at approximately 3.77 × 10 -8 cm/s, and the hydraulic conductivity of compacted clays permeated with landfill leachate or nutrient solution ranged between 1.1 × 10 -8 cm/s and 5.22 × 10 -9 cm/s. Such a significant difference was attributed to the effect of bio-clogging. The microorganism and bacterial biomass reduced the hydraulic conductivity up to one order of magnitude. This study indicated that the bio-clogging is approximately a feasible method to create low-cost and low-hydraulic conductivity barriers by using locally available clayed soils.

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Clogging of Tire Shreds and Gravel Permeated with Landfill Leachate

Rowe

McIsaac

2005

J. Geotech. Geoenviron. Eng.

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Mass loading and the rate of clogging due to municipal solid waste leachate

Cited by 14 publications

References 0 publications

Modelling species fate and porous media effects for landfill leachate flow

Modelling species fate and porous media effects for landfill leachate flow

Long-term hydraulic conductivity of compacted clay permeated with landfill leachates

Clogging of Tire Shreds and Gravel Permeated with Landfill Leachate

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