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 45 for “"Coal-ash"”.
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Beyond Waste: Uncovering the Hidden Potential of Coal Ash
The thesis lies at the intersection of the concepts of "beyond" meaning surpassing and "waste" referring to the materials and resources that are often discarded or overlooked, are the focus of this project. Overall, the project represents a commitment to surpassing conventional limits and …
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An Analysis of Coal Ash Pollution in the State of Georgia
… the factors contributing to the prevalence of coal ash in specific regions of Georgia and its impact on local ecosystems and human health. It provides an analysis of the current environmental and political issues surrounding the containment and spread of coal ash throughout the State. Coal ash …
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Measurements and Modeling of Coal Ash Deposition in an Entrained-Flow Reactor
Coal plays a significant role in meeting the world's need for energy and will continue to do so for many years to come. Economic, environmental, and public opinion are requiring coal derived energy to be cleaner and operate in a more narrow window of operating conditions. Fouling and slagging of …
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Geohydrologic evaluation of a proposed coal-ash disposal site near Mandan, North Dakota
… (MDU) operates Heskett Station, a 100 megawatt coal-fired power plant, located near Mandan, North Dakota. In the process of generating electricity, MDU's Heskett Station produces approximately 62,000 tons of coal-ash annually. The ash has been disposed of by above-ground stockpiling on the plant …
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Bioremediation of Effluent Water in a Coal Ash Disposal Area: Optimizing Microbial Sulfate Reduction
<p>Coal combustion residues (CCR) pose a serious environmental threat, even long after they are disposed of in specialized landfills, due to their complex composition and potential for leaching into waterways. This study focuses on the issue of elevated sulfate concentrations at the Martin Lake …
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Limits of justice in environmental governance: Coal ash and ethylene oxide in Waukegan, Illinois
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Analysis of Organic and Inorganic Parameters in Southern Virginia Rivers Following a Coal ash Spill
In February 2014, a coal ash spill on Duke Energy's Dan River Plant in Eden, NC released approximately 39,000 tons of coal ash into the Dan River. It took approximately one week to stop the spill. Starting in February 2015, drinking water utilities using the Dan River experienced a series of taste …
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Color Removal From Pulp Mill Effluent Using Coal Ash Produced From Georgia Power Coal Combustion Plants
… environmental concerns currently face Georgia: coal fly ash (CFA) waste from coal power plants, and the effluent generated by pulp mills. Pulp mill effluent discolors surface waters into which it is discharged, and has been proven to negatively impact the dissolved oxygen and carbon necessary …
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Water absorption and salt attack resistance of coal ash brick made of different percentage of foam content
Coal ash which constitute of fly ash and bottom ash were proved to be used as main component in brick production. However, published work on the coal ash brick with addition of foam in order to produce lightweight brick is still lacking. This thesis reports the effect of variation in foam content …
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An assessment of the environmental effects of coal ash effluents using structural and functional parameters of aufwuchs communities
… stream system receiving selected levels of fly ash, heavy metals, or sulfates was compared to a natural stream (Adair Run) influenced by effluent from the fly ash settling basin at Glen Lyn, Virginia. Aufwuchs communities colonizing glass microscope slides were monitored for dry weights, …
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A Study of the Effect of the Extraction Procedure in the Analysis of Organic Compounds Adsorbed on Coal Ash
The organic compounds found adsorbed on coal fly ash have been a cause for concern since the early days of the industrial revolution. A vast majority of the compounds reported as being adsorbed on the ash are polyaromatic hydrocarbons (PAHs). This study represents an attempt to evaluate the …
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Biogeochemical Transformations of Trace Element Pollutants During Coal Combustion Product Disposal
<p>Coal fired power plants generate approximately 45% of the electricity produced in the United States every year, and each year, over 100 million tons of coal ash are produced as a by-product of electricity generation. Coal ash is a solid waste made up principally of bottom ash, fly ash, and flue …
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Applications of Sensory Analysis for Water Quality Assessment
… On February 2, 2014 approximately 39,000 tons of coal ash from a Duke Energy coal ash pond was spilled into the Dan River near Eden, NC. As there were no documented TandO events before the spill, there is concern the coal ash adversely impacted water quality and biological communities in the Dan …
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ICP Analysis of Solids/Waste Slurries
… analysis of major, minor, and trace elements in coal, coal ash, cements, and refractory materials. In this study aqueous slurries of 6 coals were prepared by milling with a stirred-ball slurry attritor mill and an air impact pulverizer. ICP analysis values obtained for the six coals by the two …
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Development of Methods for the Determination of Major and Minor Elements and Hydrocarbon Residues in Solid Combustion Products
… the determination of inorganic constituents in coal fly ash by glow discharge spectrometry (GDS) and for the extraction of the organic compounds from coal and ash by supercritical fluid extraction (SFE) at temperatures below 150°C are reviewed. The inorganic elements studied included Al, Ca, C, …
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Particle Size, Gas Temperature, and Impingement Cooling Effects on High Pressure Turbine Deposition in Land Based Gas Turbines from Various Synfuels
… size, gas temperature, and metal temperature on ash deposits from two candidate power turbine synfuels. The facility matches the gas temperature and velocity of modern first stage high pressure turbine vanes while accelerating the deposition process. This is done by matching the net throughput of …
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Transferência de calor em leito fluidizado com tubos horizontais imersos
In a bed of coal ash particles fluidized by air with ar without horizontal immersed tubes, the influence of such tubes on the expansion of the bed is examined and comparison is made between experirnent and the two-phase theory of fluidization. The expanison of the bed was determined experimentally …
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Identifying water contamination from fossil fuel development using geochemical and isotopic fingerprints
… associated with the storage and disposal of coal combustion residuals, oil sands process-affected water, and oil and gas wastewater, as well as leaking of methane to groundwater in areas of hydraulic fracturing. In addition, contamination of water resources from natural (geogenic) sources has …
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Simulated Syngas Ash Deposition on the Leading Edge of a Turbine Vane with Film Cooling
In using coal derived syngas in a gas turbine, solid particulates coming out of the gasifier can prove to be detrimental to the engine hardware. Not much is known about particle deposition, erosion, and corrosion on turbine blades as a result of these contaminants. Performing deposition studies at …
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