Moisture Transport in a Solid Waste Column

Korfiatis, George P.; Demetracopoulos, Alexander C.; Bourodimos, E. L.; Nawy, Edward G.

doi:10.1061/(asce)0733-9372(1984)110:4(780)

Cited by 130 publications

(47 citation statements)

References 15 publications

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“…The composition of MSWs depends on industrialization, urbanization, waste management and local conditions. Incorrectly secured and improperly operated MSWs landfills pose a serious threat to the environment, mainly to the surface water and groundwater Karfiatis and Demetracopoulos 1984). The scale of this threat depends on the quantity, quality and composition of the leachate and the distance of a landfill from water sources (Słomczyńska and Słomczyński 2004).…”

Section: Introductionmentioning

confidence: 99%

Adsorption study on municipal solid waste leachate using Moringa oleifera seed

Sivakumar

2012

Int. J. Environ. Sci. Technol.

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Effects of initial concentrations of Moringa oleifera seed coagulant for removing Chemical Oxygen Demand and Total Dissolved Solids from municipal solid waste leachate have been evaluated at an optimum pH of 7 and temperature of 318 K. The kinetic data obtained from the experiments were fitted to the pseudo first-order, pseudo second-order, Elovich and intraparticle diffusion models. Based on a regression coefficient (R 2 ), the equilibrium (kinetic) data were best fitted with the Elovich model (R 2 = 0.993 for Chemical Oxygen Demand and R 2 = 0.996 for Total Dissolved Solids) than that of other models. The results of the kinetic models study indicated that the adsorption capacity of M. oleifera seed as a coagulant for removing Chemical Oxygen Demand and Total Dissolved Solids in a leachate increased up to 100 mg L -1 , beyond which the adsorption capacity got reduced. Finally, the present study concluded that M. oleifera seed coagulant could be employed effectively for the removal of Chemical Oxygen Demand and Total Dissolved Solids in a municipal solid waste leachate.

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Section: Introductionmentioning

confidence: 99%

Adsorption study on municipal solid waste leachate using Moringa oleifera seed

Sivakumar

2012

Int. J. Environ. Sci. Technol.

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“…The parameters K(h) and D(h) are dependents on the moisture content (h). Several theoretical and experimental relationship have been proposed for the determination of K(h) and D(h) Khanbilvardi et al 1995;Korfiatis et al 1984). For this study, the hydraulic conductivity K(h) can be calculated by (Khanbilvardi et al 1995), -3 ] are the moisture content and saturation moisture content of solid waste, respectively, K s is saturation hydraulic conductivity [LT -1 ] and B is a constant exponent is equal to (2b ?…”

Section: Analytical Model Studymentioning

confidence: 99%

“…For this study, the hydraulic conductivity K(h) can be calculated by (Khanbilvardi et al 1995), -3 ] are the moisture content and saturation moisture content of solid waste, respectively, K s is saturation hydraulic conductivity [LT -1 ] and B is a constant exponent is equal to (2b ? 3) (Campbell 1974;Khanbilvardi et al 1995) in which b is also a constant and it is estimated from the relation Korfiatis et al 1984).…”

Section: Analytical Model Studymentioning

confidence: 99%

Experimental and analytical model studies on leachate volume computation from solid waste

Sivakumar

2012

Int. J. Environ. Sci. Technol.

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An extensive use of solid-waste landfills for disposal of municipal and industrial wastes have prompted increased attention to groundwater pollution caused by leachate generated in such landfills. The potential for groundwater contamination by leachate has necessitated engineering designs for landfills. The quantity of leachate generated from the solid waste and the movement of water through the solid waste depends on water input and the solid-waste characteristics. This paper dealt with the experimental investigations using the laboratory solidwaste leaching column to estimate the total leachate volume/leachate flow for unsaturated and saturated conditions. The hydraulic properties of the solid waste like initial moisture content, field capacity, permanent wilting point, saturation moisture content, effective void ratio, saturation hydraulic conductivity and saturation suction pressure were determined from the small-scale laboratory experiments, which are the input for analytical model study of leachate flow/total leachate volume for both unsaturated and saturated conditions. The result of analytical model study was compared with the results of experimental investigations. Comparisons of measured and computed total leachate volume/leachate flow using Darcy's law showed reasonable agreement.

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“…Construction wastes are not applied for the drainage layer because of a high content of calcium carbonate, which increases the possibility of clogging processes. The studies performed by the world's scientists show that calcium carbonate, silica and iron compounds dominate in the clogging process [12,[22][23][24][25][26][27][28][29]. These elements are not the main pollutants of leachate, but they form the main compounds, which pollute the landfill leachate collection system.…”

Section: Introductionmentioning

confidence: 99%

Research of Sustainable Use of Tire Shreds in Landfill

Bazienė

Vaiškūnaitė

2016

Sustainability

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Studies are on-going to establish the suitability of tire shreds in the landfill bottom drainage layer, to minimize clogging. Four experimental columns were constructed in which were 500 mm long and 200 mm in diameter. They were filled with different fillers and with a different amount of tire shreds. The most important problem with drainage filler in landfills is clogging. Over long periods of time in landfill operation, the drainage layer clogs (the pores of the layer become smaller and the porosity of the layer becomes smaller). The experiment was carried out for 365 days. Although the landfill for this period represents only one-fiftieth or less of the operation time, the laboratory tests found that the drainage layer bandwidth of reduction in one year can have a negative impact in the long run over time. The main elements that influence the decrease of conductivity are the total suspended solids and calcium and iron compounds. The change of these compounds was observed during the column study, where the concentration of each month in all the columns was decreasing. The results showed that the waste of rubber (tire shreds) used for creating fillers in columns provided greater porosity of the layer. It is a beneficial reason to use a rubble and tire shreds waste mix for forming the drainage layer in landfills.

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Moisture Transport in a Solid Waste Column

Cited by 130 publications

References 15 publications

Adsorption study on municipal solid waste leachate using Moringa oleifera seed

Adsorption study on municipal solid waste leachate using Moringa oleifera seed

Experimental and analytical model studies on leachate volume computation from solid waste

Research of Sustainable Use of Tire Shreds in Landfill

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