Clogging of Tire Shreds and Gravel Permeated with Landfill Leachate

Rowe, R. Kerry; McIsaac, Reagan

doi:10.1061/(asce)1090-0241(2005)131:6(682)

Cited by 63 publications

(19 citation statements)

References 7 publications

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“…The effect of particle size arose on large scale as the smaller pore throats associated with tire chips were more easily clogged to the point where the drainage material was no longer had sufficient hydraulic conductivity to support the flow needed within drainage layer thickness. Ahmed and Lovell (1993), Reddy and Saichek (1998), Warith et al (2004), Rowe and McIsaac (2005), Mclsaac and…”

Section: Gravel and Tire Chips Used Alonementioning

confidence: 99%

Performance Assessment of Gravel–Tire Chips Mixes as Drainage Layer Materials Using Real Active MSW Landfill Leachate

2015

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Potential of clogging for rubber tire chips, gravel and their relative performance for transmitting high strength leachate when arranged in proportionate layers of relative thickness and in random state mixes of various percentage compared to the case of used alone were studied through column experiments. Comparative hydraulic performance of gravel and tire chips in their different combinations with percentage change (reduction) in COD, TSS, Ca-hardness and TDS concentration levels for the real active high strength MSW landfill leachate with time were investigated. Experiments were performed to simulate conditions occurring at the base of all active MSW landfills, in an attempt to replicate reasonably worst case conditions. Results clearly showed that the combinations ds (scrap tire chips layer thickness)/dg (gravel layer thickness) = 0.25, 0.50 (arranged by relative thickness) and Ws:Wg = 1:3 (25 % tire chips:75 % gravel; mixed by weight friction of each component) were good in term of obtaining initially relatively free drainage. Minor reduction in hydraulic conductivity for fairly longer duration, due to lesser clogging and small reduction in COD, TSS and Cahardness concentration levels were observed for these combinations. These experimental findings may prove to be very useful for the proper design, long term performance and service life of all tire chips-gravel made drainage layers of all the active MSW landfill leachate collection and removal systems.

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Section: Gravel and Tire Chips Used Alonementioning

confidence: 99%

Performance Assessment of Gravel–Tire Chips Mixes as Drainage Layer Materials Using Real Active MSW Landfill Leachate

2015

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“…The parameters that were analyzed include: dispersivity, nominal gravel grain size, suspended particle size, suspended particle density, method of detachment, and Monod kinetic constant parameters. n = 0.12 for the gravel study (measured data from Rowe and McIsaac 2005). , dispersivity; n, porous media porosity; calc., calculated; meas., measured.…”

Section: Model Parametric Study For Coarse Gravelmentioning

confidence: 99%

Modelling the clogging of coarse gravel and tire shreds in column tests

Rowe

Babcock

2007

Can. Geotech. J.

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A combination of data from laboratory tests and modelling is reported for both coarse gravel (19–38 mm) and two types of tire shred permeated with municipal solid waste leachate. It is suggested that the dispersivity of both the coarse gravel (initially about 4 mm) and tire shreds (initially about 45 mm) increases as the porosity of the drainage media is reduced because of clogging. The detachment of biofilm caused by growth and shear is examined and both are found to influence clogging. The average grain size estimated based on the measured surface area of the particles within a unit volume is shown to provide a good prediction of the rate of clogging for gravel and a conservative prediction for tire shreds. The size and density of suspended solids in leachate is found to significantly influence clogging rates. It is shown that Monod kinetic constants deduced for gravel at 27 °C give a good prediction of clogging for two different types of tire shred at the same temperature. Calibrated parameters used with the BioClog model are shown to give good fits to the porosity of both gravel and tire shred drainage material in laboratory column tests over time periods of up to 2 years.

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“…Several laboratory studies have been conducted to show the effectiveness of scrap tires in a leachate collection layer (Edil et al 1992;Humphrey and Manion 1992;Reddy and Saichek 1998;Warith et al 2004;Rowe and McIaac 2005). The drainage performance of scrap tires, as well as their capability in protecting the underlying liner system, was also observed in field studies (Evans 1997; Reddy and Saichek 1998;Park et al 2003).…”

Section: Introductionmentioning

confidence: 98%

“…Tire shreds and tire shreds-sand mixture have high permeability and retain it even under high vertical loads (Edil et al1992). A laboratory column study conducted by Rowe and McIaac (2005) indicated that scrap tires were more prone to clogging than uniform gravels in critical zones e.g., near leachate sumps; however, problem can be solved by providing uniformly graded large size tire shreds placed at appropriate design thickness. Edil et al (2004) based on batch isotherm tests observed that scrap-tire-chips are good sorbents of volatile organic compounds (VOCs) and could be used as leachate drainage layer material in solid waste landfills.…”

Section: Introductionmentioning

confidence: 99%

Performance of Scrap Tire Shreds as a Potential Leachate Collection Medium

2010

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The use of scrap-tire-shreds as leachate collection layer in landfills would reduce the magnitude of the current tire disposal problem by converting a waste into a beneficial material. Laboratory studies were conducted to investigate scrap-tire-shreds as an attractive potential alternative to conventional gravel in the drainage layer of leachate collection system by comparative analysis of various physico-chemical parameters. Gravel and scrap-tire-shreds in combination were used as leachate collection layer. Laboratory Test Cells consisting of different combinations of scrap-tire-shreds (size range length = 25.4 mm to 76.1 mm and width = 5 mm) and gravel (size range 10 mm to 20 mm) beds as leachate collection layer with total bed thickness of 500 mm were constructed. Performance study of Test Cells-1 to 7, having different combinations of scrap-tire-shreds and gravel bed thickness, were studied to work out the best combination. Combined beds of scrap-tire-shreds and gravel gave better results as compared to conventional gravel or scrap-tire-shreds bed when used singly.Test Cell -3 having scrap-tire-shreds layer (200 mm) and gravel layer (300 mm) gave the best results in terms of percentage reduction in various physicochemical parameters of leachate. The reduction was as high as 68.8 and 79.6% in case of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) values respectively. Further, three more laboratory Test Cells-8, 9 and 10 were constructed having scrap-tire-shreds and gravel layer ratio same as that of Test Cell-3 (best combination) but having scrap-tire-shreds of different widths 10 mm, 15 mm and 20 mm to find out the most suitable size. Bed of smaller size scrap-tire-shreds (5 mm) gave better results in comparison to bigger sizes. Leachate sample after passing through combined beds of scrap-tireshreds and gravel gave better results in percentage reduction in various physico-chemical parameters of leachate as compared to conventional gravel or scraptire-shreds bed when used singly.

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Clogging of Tire Shreds and Gravel Permeated with Landfill Leachate

Cited by 63 publications

References 7 publications

Performance Assessment of Gravel–Tire Chips Mixes as Drainage Layer Materials Using Real Active MSW Landfill Leachate

Performance Assessment of Gravel–Tire Chips Mixes as Drainage Layer Materials Using Real Active MSW Landfill Leachate

Modelling the clogging of coarse gravel and tire shreds in column tests

Performance of Scrap Tire Shreds as a Potential Leachate Collection Medium

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