Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 267 for “"landfills"”.
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Enhanced Biodegradation in Landfills
… of leachate recirculation and bioreactor landfills at enhancing biodegradation, and to optimize the operation of a bioreactor. Waste Management has been examining leachate recirculation landfills for several years. Samples of Municipal Solid Waste (MSW) from existing leachate recirculation …
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Evaluation of Stability Parameters for Landfills
There are more than three thousand landfills in the United States, in which approximately 55% (1998, U. S. EPA 1999) of the MSW generated in the US is buried. The majority of the landfills are conventional, but in the last two decades new types of landfills, called leachate recycle and bioreactor …
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Biochemical Lignin Related Processes in Landfills
… to determine how the key features of bioreactor landfills; increased temperature, moisture and microbial activity, affect the biological stability of the landfill material. In the first part of the study the solubilization and degradation of lignin in paper exposed to these bioreactor landfill …
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In-situ Ammonia Removal Of Leachate From Bioreactor Landfills
… operate the landfill as a bioreactor. Bioreactor landfills are controlled systems in which moisture addition and/or air injection are used as enhancements to create a solid waste environment capable of actively degrading the biodegradable organic fraction of the waste. Although there are many …
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Wildflower establishment on landfills in central and southwestern Virginia
Municipal solid waste landfills are convenient means of disposing of society's waste; once closed, they become a liability to the community due to attributes which contribute to soil and water contamination. Regulations state that adequate vegetation be used to maintain the integrity of the soil …
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Field Emissions of Methane and Nitrous Oxide from California Landfills
… were conducted at representative California landfills to quantify emissions of methane and nitrous oxide. Landfills are highly engineered; however, they are one of the largest anthropogenic sources of greenhouse gases, causing human health and safety concerns. Methane (CH<sub>4</sub>) and …
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Thermal Numerical Analysis of Vertical Heat Extraction Systems in Landfills
… was conducted to determine the response of landfills to the operation of a vertical ground source heat pump (i.e., heat extraction system, HES). Elevated landfill temperatures, reported various researchers, impact the engineering performance of landfill systems. A numerical model was …
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Effects of Temperature on Anaerobic Lignin Degradation in Bioreactor Landfills
Bioreactor landfills have become a feasible alternative to the typical "dry tomb" landfill. By recirculating leachate and/or adding additional liquid wastes, bioreactor landfills operate to rapidly degrade and transform organic wastes. The reactions within a bioreactor landfill create elevated …
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Variation Of Geotechnical Strength Properties With Age Of Landfills Accepting Biosolids
… is sometimes co-disposed along with MSW in landfills. Recent work at the University of Central Florida has focused on the behavior of the mixture of MSW and biosolids. As an increased amount of waste accumulates in these landfills, it creates a new problem – the geotechnical stability of …
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Temporal and Spatial Analysis of Landfills and Transfer Stations in Saskatchewan
Saskatchewan has the highest number of landfills per capita in Canada. Given the lower population density and the skewed spatial population distribution, comprehensive analysis of municipal solid waste management systems in Saskatchewan is inherently difficult. Most of the published waste studies …
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Slope Stability Analysis Of Class I Landfills With Co Disposal Of Bios
… world, the demand for larger and higher capacity landfills is rapidly increasing. Proper analysis and design on such fills have pushed the boundaries of geotechnical engineering practice, in terms of proper identification and assessment of strength and deformation characteristics of waste …
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The status of wood pallet disposal and recovery at united states landfills
… number of wooden pallets are disposed of in US landfills, representing a significant portion of total wood usage. The purpose of this research was to gain an understanding of the numbers of pallets reaching landfills, specifically Municipal Solid Waste (MSW) and Construction & Demolition (C&D) …
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Characterizing and modeling the hydrologic properties of coal combustion by-products in landfills
… byproducts (CCBs) disposed of in unlined landfills can impact the quality of adjacent water resources. In previous studies, CCBs have been found to leach toxic heavy metals such as arsenic, mercury, and lead into groundwater. CCBs include fly ash, bottom ash, and flue gas desulfurization …
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"Giving new meaning to ""Mound City"" landfills as a historical narrative of St. Louis, Missouri"
… and cultural significance. It illustrates that landfills have shaped the built environment. Landscapes are often perceived as natural, though the reality is man has shaped many of them. The physical environment and how it changes is the result of the influence of our culture. A specific example …
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Development of a technical management tool for settlement and stability behaviour of municipal solid waste landfills
… of disposal of municipal solid waste (MSW). Landfills are engineered structures consisting of bottom liners, leachate collection and removal systems, and final covers. With an expanding world and the remarkable growth of industry, the demand for larger and higher capacity landfills is rapidly …
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Subsurface discontinuity analysis & modeling for the federal waste disposal facility and compact waste disposal facility landfills
This research considers discontinuities mapped by Waste Control Specialists LLC to support the site conditions and performance analysis of the Compact Waste Disposal Facility and the Federal Waste Disposal Facility excavations constructed near Andrews, Texas. Discontinuities observed in excavation …
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Investigation into the Landfilling and Recovery of Wood and Wooden Pallets at U.S. Landfills in 2021
… Solid Waste and Construction and Demolition landfills and investigate alternate uses for pallets. This study was conducted by sending out paper and electronic questionnaires to active landfills in the continental U.S. The study found that 76.8 million pallets, 8.4% of new pallets in 2021, end …
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An Investigation Into the Detection and Analysis of Selected Landfills Within Central and Southwest Missouri Using Remotely Sensed Data
… research concerns the detection and analysis of landfills within a selected Landsat Five scene that covers parts of central and southwest Missouri. Detecting and analyzing landfills over relatively large areas to assess vegetative growth and vigor are of vital interest to county, state and …
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Why Landfills Endure: Quantifying economic barriers to material and energy recovery from municipal solid waste in the United States
… MSW generated in the United States was sent to landfills for final disposal in 2018 and almost half of all landfills currently in operation are expected to reach capacity by 2050. Waste planners seek to use developing resource recovery technologies like dry anaerobic digestion, gasification, and …
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