Impact of biological clogging on the barrier performance of landfill liners

Tang, Qiang; Gu, Fan; Zhang, Yu; Zhang, Yuqing; Mo, Jialin

doi:10.1016/j.jenvman.2018.05.039

Cited by 74 publications

(40 citation statements)

References 60 publications

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“…A material is said to be compatible if its interaction with the leachate does not result in compromise of, especially, the hydraulic properties [162]. One research group employed three different species of urease-positive microorganisms, i.e., Bacillus pumilus, Bacillus coagulans, and S. pasteurii, to evaluate tropical residual soil (lateritic soil) for use as a liner in waste containment facilities using the MICP approach [114,115,[163][164][165][166][167][168][169][170][171]. Positive results have been reported for all the required parameters for evaluation of these materials, viz.…”

Section: Waste Containment Applications and Contaminant Attenuationmentioning

confidence: 99%

“…Positive results have been reported for all the required parameters for evaluation of these materials, viz. UCS [114,115,163], hydraulic properties [113,154], volumetric shrinkage [164][165][166], and compatibility [72,[167][168][169][170][171]. The results of these studies are not only viable but also promising, and more years of exciting research opportunities from laboratory studies to full implementation of these research findings at larger scale lie ahead.…”

Section: Waste Containment Applications and Contaminant Attenuationmentioning

confidence: 99%

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Review of the use of microorganisms in geotechnical engineering applications

et al. 2020

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Until recently, engineers either ignored or neglected the role of microorganisms in geotechnical engineering. The microbially induced calcite precipitation (MICP) research technique is an innovative and relatively green technology which consists in a biological process through which microorganisms react with minerals (calcium source and cementation reagent) to produce calcite (CaCO 3 ) as a byproduct that modifies and improves the engineering properties of soil. Laboratory and field results obtained from various studies are promising and viable, suggesting potential for various engineering applications. This research technique has also been considered to be useful in many engineering applications such as improvement of construction materials, cementation of porous media, improvement in strength and stiffness of engineering soils, hydraulic control of engineering facilities (waste containment), liquefaction, and erosion mitigation. In this review, the various methods of production of calcium carbonates (calcite), the role played by bacteria, various state-of-the-art procedures that have evolved in this research area, as well as ongoing studies are reported. Furthermore, the use of the MICP technique in remediation of contaminants and other environmental concerns is also presented. The advantages and challenges (in form of undesired byproducts) of this research technique are highlighted herein.

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Section: Waste Containment Applications and Contaminant Attenuationmentioning

confidence: 99%

Section: Waste Containment Applications and Contaminant Attenuationmentioning

confidence: 99%

Review of the use of microorganisms in geotechnical engineering applications

et al. 2020

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“…In the pull-out test, the pull-out performance of reinforcement is affected by many factors. Lopes show that the increase of limiting stress, dry density, or displacement rate will increase the shear strength of soil [33][34][35].…”

Section: Pull-out Test Resultsmentioning

confidence: 99%

Shear Behaviors of the Intersurface between Rice Straw Rope and Dredger Fill Silt: Experimental and Mechanism Studies

Chen

Shi

et al. 2020

Advances in Civil Engineering

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The further development of land reclamation, port waterway, and wharf construction brings about proper treatments of dredger fill silt, while huge amounts of rice straw set aside in China argument rational disposal every year. Therefore, rice straw is bundled up as ropes, which represent as drainage body and reinforcement, to make eco-friendly treatment for dredger fill silt. This paper investigates the mechanical properties and validity of rice straw rope as certain treating material of dredger fill silt through a series of pull-out test, mass loss test, and tension test on specimens with different water contents and dry densities. The results reveal that peak value of interfacial shear strength rises with the increase of normal stress at the same immersion time, and in particular, it rises by up to 250.0% when the normal stress is 40 kPa. The tensile force of rice straw rope increases slowly with the rise of tensile displacement, and the failure mode changes from brittle to ductile with the rise of immersion time, which witnesses first rapid back slow degradation trend. The proper interfacial shear strength, tensile force, and reasonable degradation rate of rice straw rope make it ideal in drainage and consolidation of dredger fill silt.

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“…Rowe and Yu [27] used the BioClog model to analyze the clogging of landfill leachate flowing through gravel drains. With extended durations of landfill operation, the drain clogs due to physical, chemical, and biological activities [28,29], that is, the permeability of the drainage layer decreases gradually with waste degradation time. e initial permeability of the drainage layer should not be below 1.0 × 10 − 3 m/s in China.…”

Section: Introductionmentioning

confidence: 99%

Seepage Analysis of a Multilayer Waste Slope considering the Spatial and Temporal Domains of Permeability

Rong

Jaturapitakkul

2019

Advances in Civil Engineering

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Landfilled municipal solid waste has evident heterogeneity, and clogging of the drainage layer can easily happen during operation of the landfill. These two factors significantly influence the distribution of leachate in a landfill. Herein, the distribution of waste permeability in the spatial and temporal domains was analyzed. Then, changes to the drainage-layer permeability in the temporal domain were fitted to these data. A simple model of multilayer waste slope was established combining the finite element software and a user subroutine. Herewith, changes of permeability in the waste and drainage layers were simulated, such that the heterogeneity of waste and the process of clogging of the drainage layer could be simulated. Then, the leachate distributions and transport conditions of nine schemes for landfill were analyzed. The results indicated that the distribution curve of waste-saturated permeability follows a logarithmic relation in the vertical direction, and the distribution curve of fresh-waste-saturated permeability follows a polynomial relation in time. After each landfill is worked for a few years, the drainage layer always encounters clogging problems of some kind and its permeability decreases by one to five orders of magnitude. Through numerical models, the simulation results of the permeability distribution in the spatial and temporal domains were found satisfactory. When the permeability distributions were layered in the buried depth, pore pressures and leachate levels are smaller than the logarithmic distributions. During the process of degradation, the pore pressures and leachate levels are increased slightly under the consideration of the polynomial distribution of waste permeability in time. With clogging of the permeability of the drainage layer, the pore pressures and leachate levels of landfill were found to be increasing gradually. To obtain results closer to that of actual situations, corresponding models should be established and analyzed based on a range of permeability, waste degradation rate, and degree of clogging.

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Impact of biological clogging on the barrier performance of landfill liners

Cited by 74 publications

References 60 publications

Review of the use of microorganisms in geotechnical engineering applications

Review of the use of microorganisms in geotechnical engineering applications

Shear Behaviors of the Intersurface between Rice Straw Rope and Dredger Fill Silt: Experimental and Mechanism Studies

Seepage Analysis of a Multilayer Waste Slope considering the Spatial and Temporal Domains of Permeability

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