Testing the hydraulic conductivity of degraded municipal solid waste in China

2019 ◽  
pp. 1-8
Author(s):  
Yingfeng Wang ◽  
Zhenying Zhang ◽  
Hui Xu ◽  
Dazhi Wu ◽  
Xinyu He ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste

Effect of plastic fragments on hydraulic characteristics of pretreated municipal solid waste

2006 ◽  
Vol 43 (12) ◽  
pp. 1333-1343 ◽  
Author(s):  
Mingliang Xie ◽  
Dirk Aldenkortt ◽  
Jean-Frank Wagner ◽  
Gerhard Rettenberger
Keyword(s):  
Fluid Flow ◽  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Conceptual Model ◽  
Hydraulic Properties ◽  
Thin Sheet ◽  
Biological Pretreatment ◽  
Soil Material

A systematic study was undertaken of the granular composition and hydraulic properties of municipal solid waste (MSW) produced by mechanical–biological pretreatment (MBP–MSW) from three different treatment plants with the aim of evaluating the potential application of MBP–MSW as an alternative barrier material for landfill final cover systems. Despite its coarse granular composition, MBP–MSW has low hydraulic conductivity. Long-term permeability tests show that the hydraulic conductivity decreases with time. The most likely explanation for the long-term changes in permeability is the swelling of organic material contained within the compost. In the case of saturated flow, the virtually impermeable plastic fragments embedded in the material impede fluid flow. In the unsaturated case, such fragments slow down the drying process by disrupting fluid flow and allowing pooling of water above horizontally oriented fragments. The larger the number and size of the plastic fragments, the greater the influence on hydraulic conductivity and shrinkage. These processes can be better understood with the newly developed conceptual model, the thin-sheet model. Based on this conceptual model, laboratory tests were undertaken to compare natural soil material with mixtures of soil material and plastic fragments. Corresponding numerical simulations of some experiments verified the influence of plastic fragments on the hydraulic properties of MBP–MSW.Key words: mechanical–biological pretreatment, municipal solid waste (MSW), thin-sheet model, plastic fragment, hydraulic conductivity, drying test.

Development of a Homogeneous Model Municipal Solid Waste

2013 ◽  
Vol 831 ◽  
pp. 331-335 ◽  
Author(s):  
Ren Peng ◽  
Yu Jing Hou ◽  
Xue Dong Zhang ◽  
Qing Lei Sun
Keyword(s):  
Shear Strength ◽  
Hydraulic Conductivity ◽  
Physical Properties ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Homogeneous Model ◽  
Saturated Hydraulic Conductivity ◽  
Unit Weight ◽  
The Real ◽  
Compression Factor

A model waste mixing with kaolin, sand, and peat was developed. The physical properties of the waste were compared with the real municipal solid waste (MSW). The influence of unit weight on compression factor, shear strength, and saturated hydraulic conductivity was acquired. In addition, the homogeneous of the soil model was detected using the IWHR 450g-ton centrifuge and the newly developed centrifuge-robot.

Shrinkage behavior of clay liner material exposed to simulated municipal solid waste landfill leachate

1988 ◽  
Vol 15 (4) ◽  
pp. 500-508 ◽  
Author(s):  
J. P. A. Hettiaratchi ◽  
S. E. Hrudey ◽  
D. W. Smith ◽  
D. C. C. Sego
Keyword(s):  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Effective Stress ◽  
Clay Liners ◽  
Laboratory Procedure ◽  
Liner Material ◽  
Landfill Liner ◽  
Free Swell ◽  
Soil Shrinkage

The use of hydraulic conductivity (k) of soil material as the sole basis for sanitary landfill liner design is reviewed. On one hand, k measurements obtained in the laboratory often vary by several orders of magnitude. On the other, laboratory-measured k values fail to address field behavior, where crack formation before and (or) during landfill operation may control the bulk permeability.A synaerisis shrinkage test (SST) to study the soil shrinkage caused by municipal solid waste (MSW) leachates is introduced. Leachates cause soil shrinkage by reducing interparticle repulsive stresses thereby increasing effective stress. The effective stress concept and double layer theory adequately describe the synaerisis shrinkage phenomenon. A strong correlation was obtained between percent strain, the soil–liquid parameter determined from SST results, and a volume change parameter (free swell difference, FSD) from sedimentation test results. The results provide a basis for a broader approach to landfill liner design. The SST, which supplies information on both volume shrinkage and permeability changes caused by leachate, provides a useful laboratory procedure for evaluating liner materials. Key words: clay liners, shrinkage, leachate, synaerisis, hydraulic conductivity.

scholarly journals Reutilization of granite powder as a component of permeable reactive barriers for the treatment of Cr(VI)-contaminated waters .

2014 ◽  
Vol 4 ◽  
Author(s):  
María Teresa Barral ◽  
Ángel Liste ◽  
Alejandro Balufo ◽  
Remigio Paradelo ◽  
Javier Cancelo-González ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Adsorption Capacity ◽  
Groundwater Remediation ◽  
Cost Effective ◽  
Permeable Reactive Barriers ◽  
Pine Bark ◽  
Reactive Barriers ◽  
Granite Powder

Permeable reactive barriers (PRBs) are efficient and cost-effective systems for groundwater remediation. Different types of material have been tested as reactive media for constructing PRBs. To this purpose, the use of waste materials is of particular interest, provided they meet some permeability and reactivity requirements. In the present study, the use of granite powder, a waste generated during the process of cutting granite, was evaluated as a component of PRB filler, mixed in different proportions with compost. The Cr(VI) adsorption capacity and desorption behaviour of granite powder, pine bark compost, composted municipal solid waste and mixtures containing different proportions of granite powder and compost was compared. Individually, the granite powder was not suitable for use as PRB filler because of its moderate permeability and Cr(VI) adsorption capacity. The addition of pine bark compost increased the hydraulic conductivity and improved the Cr(VI) adsorption capacity of the material, while decreasing Cr desorption. In turn, the addition of compost derived from municipal solid waste did not have the same beneficial effect, as it decreased the hydraulic conductivity of the mixtures and had only slightly improved the adsorption capacity. In summary, mixtures containing 50 or 25% granite powder and 50 or 75% pine bark compost (v/v), respectively, were the best materials for use as a PRB in relation to cost/effectiveness.

scholarly journals Improvement of Soil Quality Parameters by Municipal Solid Waste Compost Application in Clay-Loam Soil

2020 ◽  
Vol 8 (3) ◽  
pp. 603
Author(s):  
Orhan Yüksel ◽  
Yasemin Kavdır
Keyword(s):  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bulk Density ◽  
Soil Samples ◽  
Experimental Plant ◽  
Clay Loam ◽  
Undisturbed Soil ◽  
Municipal Solid Waste Compost ◽  
Experimental Plots

Organic matter (OM) content of the soils should be improved for sustainable productions. Municipal solid waste compost (MSWC) is an organic material used in several countries to improve soil OM contents. This study was conducted to determine potential use of MSWC as soil amendment. Field experiments were conducted for two years with single MSWC treatments. Experiments were conducted on 18 plots in randomized complete blocks design with 3 replications. Six different MSWC doses (0, 40, 80, 120, 160 and 200 t ha-1) were applied to experimental plots. Compost doses were calculated in dry weight basis, applied to 21 m2 plots and sunflower was sown as the experimental plant of the study. Following the sunflower harvest, disturbed and undisturbed soil samples were taken from the experimental plots and soil samples were subjected to various analyses. Applied MSWC doses significantly increased soil OM contents, electrical conductivity (EC) and cation exchange capacity (CEC), aggregate stability (AS) and saturated hydraulic conductivity (Ksat) and reduced soil bulk density (BD). Effects of MSWC on soil pH were not found to be significant. Effects of MSWC treatments were more remarkable with increasing doses. MSWC treatments increased soil OM contents about 3 folds and increased CEC by about 25%. MSWC treatments significantly increased salt contents of the soils. Such increases were found to be significant at 1% level in the first year and 5% level in the second year. Increasing OM contents also increase soil aggregation, thus reduced bulk density and increased hydraulic conductivity. Correlation analysis revealed significant correlations between OM and AS. Present findings revealed that MSWC positively influenced physical and chemical characteristics of clay-loam soils of arid and arid climates, but salt contents should carefully be monitored in repetitive uses.

Saturated Hydraulic Conductivity of Municipal Solid Waste Considering the Influence of Biodegradation

2018 ◽  
Vol 144 (9) ◽  
pp. 04018080 ◽  
Author(s):  
Miriam Gonçalves Miguel ◽  
Bruno Cesar Mortatti ◽  
Jorge Luiz da Paixão Filho ◽  
Sueli Yoshinaga Pereira
Keyword(s):  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Saturated Hydraulic Conductivity

Evolution of saturated hydraulic conductivity with compression and degradation for municipal solid waste

2017 ◽  
Vol 65 ◽  
pp. 63-74 ◽  
Author(s):  
Han Ke ◽  
Jie Hu ◽  
Xiao Bing Xu ◽  
Wen Fang Wang ◽  
Yun Min Chen ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Saturated Hydraulic Conductivity

scholarly journals Evaluation of the Hydraulic Conductivity of Compacted Laterite-Metakaolin Mixtures for Solid Waste Leachate Containment

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Sa’eed Y Umar ◽  
Augustine U Elinwa
Keyword(s):  
Hydraulic Conductivity ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Deionized Water ◽  
Point Of View ◽  
Regression Equations ◽  
Liner Material ◽  
Natural Logarithm ◽  
Level Of Significance ◽  
Waste Leachate

This paper presents the results of a study conducted to investigate the benefits of using metakaolin (MK) with laterite as liner material for containment of municipal solid waste (MSW). Laboratory tests were conducted on laterite specimens treated with MK at concentrations of 0 - 20 % by weight of the soil and compacted using four types of compaction energies. Hydraulic conductivity was determined based on permeation of the compacted laterite - MK mixtures with deionized water (DW) and municipal solid waste leachate (MSWL), respectively. Deionized water was the reference permeant fluid.  The results showed that hydraulic conductivity generally decreased with increase in the percentage addition of MK to the soil. From an economic and sustainability point of view, it has been found from the results that 5 % MK can be added to soil and compacted at moulding water content of 14.1 % using the West African Standard (WAS) compaction energy to achieve the regulatory hydraulic conductivity of less than or equal to 1 x 10-9 m/s for compacted soil liner. The natural logarithm of the hydraulic conductivity experimental results were computed and used to develop regression equations for estimating hydraulic conductivity given MK contents and compaction energies. The results of the two-way analysis of variance (ANOVA) test carried out at 5 % level of significance showed that calculated F-statistics are statistically significant and the measured values of hydraulic conductivity compare well with the predicted values. The developed models can therefore be used to give good estimates of hydraulic conductivity of soils having similar properties with the laterite investigated in this study. Therefore, the developed models can be used to give good estimates of hydraulic conductivity of soils having similar properties with the laterite investigated in this study. Keywords ­_ Deionized water, Hydraulic conductivity, Leachate, Metakaolin, Municipal solid waste.

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