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 11 of 11 for “"hydrocarbon degradation"”.
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Biochar as a soil amendment to enhance petroleum hydrocarbon degradation in northern landfarms
… regions slows efforts to remediate petroleum hydrocarbon (PHC) contaminated soils through conventional landfarming practices. Thus, cost-effective soil remediation strategies that are active under frozen conditions and specific to cold regions are in strong demand. Biochar amendments have been …
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Understanding polycyclic aromatic hydrocarbon degradation by soil microbial communites: the concentration and distribution of aromatic dioxygenase genes
… the genes to metabolize polycyclic aromatic hydrocarbons (PAHs), persistent pollutant byproducts of coal coking. The deposition of PAHs influences the development of soil microbiological communities, creating selective pressure for the development of microbial communities able to survive. To …
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Mechanisms of Microbial Methane Production from Sub-Bituminous Australian Coal
… chemicals and enzymes mimicking microbial coal degradation, compounds such as acetate, propionate and formate were produced. Methane production and microbial community changes were studied during a field trial with wells drilled into the LSCM coal seam. Microbial analysis using the 16S rRNA …
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Bioremediation of petroleum hydrocarbon contaminated soil
… of two inoculation materials - Sybron’s ABR Hydrocarbon Degraders and Rhodococcus sp. - on the rate of hydrocarbon degradation. Treatment units without nutrients and introduced organisms served as controls. Total petroleum hydrocarbon concentrations (TPH) were monitored using two alternative …
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Proteomic insights into the marine obligate hydrocarbonoclastic bacteria (OHCB) during alkane degradation
… spills due to their distinct ability to utilize hydrocarbons as sole carbon and energy sources. They perform key roles in the natural attenuation of oil pollution, but also have the potential to be used in bioremediation strategies. To understand the enzymes involved in alkane degradation in …
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Effect of Crude Oil on Light Attenuation and the Resulting Impacts on Marine Microbial Phototrophs and Heterotrophs
… community and potentially the rate of hydrocarbon degradation. Experiments were conducted using natural seawater with a crude-oil layer (but not in contact with), a no-oil control, oil spectrum and standard light-spectrum. Treatments included continuous light and light: dark regimes. …
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Marine microbial communities capable of hydrocarbon biodegradation along shipping routes in the Kivalliq region of the Canadian Arctic
… well understood regarding its potential for biodegradation of oil spills. Reduced ice cover due to climate change has led to increased human activities, with attendant risks of oil and fuel spills associated with shipping traffic. This threatens the marine ecosystem and well-being of Canadians …
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The Plant Growth-Promoting Potential of Root-Associated Bacteria from Plants Growing in Stressed Environments
… nutrient-deficient agricultural soil and a hydrocarbon-contaminated soil for plant growth-promoting potential in vitro and ii) assess the plant growth-promoting capabilities of isolates in vivo. Bacterial isolates belonging to genera common to both environments were screened for plant …
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Microbial Ecology of Subsurface Oil Sands Deposits in Northern Alberta, Canada
… habitat. Over geological time, progressive biodegradation of low molecular weight hydrocarbons by indigenous microorganisms has resulted in an enrichment of high molecular weight hydrocarbons known as bitumen. This is an extreme environment characterized by low water and nutrient availability, …
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Investigation of temperature effects on subsurface attenuation of nitroaromatic compounds
… increases rates of anaerobic petroleum hydrocarbon degradation. The overarching goal of this research is to determine whether thermal enhancement might increase attenuation rates of NACs under otherwise natural conditions at the contaminated site. Detailed depth-resolved site …
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Study of Hydrocarbon Waste Biodegradation and the Role of Biosurfactants in the Process
… facility were studied to reduce the volume of hydrocarbon waste. The specific goals of this laboratory study were to evaluate rate and extent of microbial degradation, benefits of organism addition, role of biosurfactant, and dewatering properties. The oily waste sludges differed in …