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 20 for “"microbial community analysis"”.
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Microbial community analysis for denitrifying biofilters
… was limited. Therefore, in this study, the microbial community of the biofilter was described using several different techniques. Denitrifying enzyme assays with inhibition showed that denitrification is primarily mediated by bacterial populations, but that fungi are also indirectly …
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Microbial community analysis of a UASB reactor and application of an evolutionary algorithm to enhance wastewater treatment and biogas production
Submitted in complete fulfillment for the degree of Doctor of Philosophy (Biotechnology), Durban University of Technology, Durban, South Africa, 2015.
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Enhancing Economic and Environmental Value in Soybean Production through Value-Added Innovation
… complex production-consumption patterns. Microbial community analysis through 16S rRNA sequencing identified specific taxa associated with each gas. Overall, soil carbon, nitrogen, and base cations showed positive relationships with GHG-positive microbes, while iron and several …
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Assembly and functioning of microbial communities along terrestrial resource gradients in boreal lake sediments
… initial processing of terrestrial resources by microbial communities at the base of lake food webs remain poorly understood. With this in mind, this thesis aims to advance our understanding of lake sediment microbial community assembly and functioning along abiotic gradients, primarily …
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Effects of Capping on Biodegradation of Organic Contaminants in Sediments
… sediment under sulfate reducing conditions. Microbial community analysis results suggested that Pelobacter sp. and Desulfuromonas sp., which are members of Geobacteraceae family, possibly played important roles in the anaerobic degradation of PAHs.
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Structure, Synthesis and Biological Activity of Harmful Algal Bloom Toxins from Karlodinium sp. and Exploration of Microbial Derived Natural Products
… products isolated from both the marine and microbial environments. Part I focuses on the elucidation of toxins from harmful algal blooms (HAB). The HAB dinoflagellate <italic>Karlodinium veneficum</italic> produces a harmful suite of molecules identified as the karlotoxins (KmTx) that have …
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Examining Complex Microbial Communities Using the Terminal Restriction Fragment Length Polymorphism Method and Dedicated TRFLP Analysis Software
… be used to determine the composition of complex microbial communities found in a variety of environments. In an effort to profile these communities, a 16S rDNA directed, sequencing independent method, Terminal Restriction Fragment Length Polymorphism (TRFLP) was used to generate fragment profiles …
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16S rRNA sequence analysis of silver carp microbial community in eDNA water samples
… containing set numbers of invasive Silver Carp. Analysis eDNA samples typically involves only targeting the species of interest. However, eDNA detection alone cannot undeniably confirm the presence of the species of interest and a second line of evidence would be beneficial in making this assay …
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The microbial communities and nutrient availability in pre and post harvested lodgepole pine stands of west-central Alberta
… within the forest but also within the global community. Soil microorganisms are a vital part of this cycle, as they sequester or make nutrients available for the development of the forest environment. When a disturbance event occurs, changes to the environment occur; however, it is unclear how …
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CRABS & ‘CROBES: THE TRIPARTITE RELATIONSHIP OF A HOST, PARASITE, AND THEIR RESPECTIVE MICROBIOMES
… This relationship among hosts, parasites, and microbial communities changes the dynamic of host-parasite evolution from a more traditional co-evolution, to a tripartite evolutionary relationship. My research aimed to resolve questions about the community composition and diversity of microbial …
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Advancing wastewater valorization using anaerobic membrane bioreactors with bioaugmentation and ion-exchange, and bio-plastic production
… as well as bio-polymer recovery via mixed microbial culture (MMC) polyhydroxyalkanoate (PHA) production. The first study presented in this dissertation investigated the application of bioaugmentation in the acid-phase of a two-phase AnMBR treating primary sludge to improve solids removal …
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Development of a biocathode system in microbial fuel cells for improved treatment of azo dyes
Microbial fuel cells (MFCs) hold great promise for simultaneous wastewater treatment and electricity production. However, their performance is currently hampered by several challenges including high cathodic potential losses and cost of platinum (and other materials) used as a catalyst for the …
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USE OF GAS EMISSION BY BIOELECTROCHEMICAL APPROACHES FOR POWER-TO-X
… to couple renewable electricity storage with microbially catalysed carbon and nitrogen capture. Their mild operating conditions, renewability and tolerance to impurities of the biocatalyst could enable the valorisation of industrial side-streams and CO2-rich emissions. This PhD project …
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Treatment of azo dyes in industrial wastewater using microbial fuel cells
… waste streams. Therefore, in this study, microbial fuel cells (MFCs) were studied as possible systems that could effectively degrade azo dyes with an additional benefit of concomitant biogenic electricity generation. The co-metabolic degradation of the model azo dye Acid Orange-7 (AO-7) …
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Estudio a escala piloto de la desulfuración anóxica de biogás empleando un efluente nitrificado a partir de lixiviados de vertedero
… with an elemental sulfur yield of 60%. Microbial community analysis revealed a predominance of the genus Thioalkalispira-Sulfurivermis as the primary driver of desulfurization in the bioreactor. The system proved resilient to operational disturbances, such as recirculation pump failures …
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Microbial Ecology of Subsurface Oil Sands Deposits in Northern Alberta, Canada
… Canada, is an important yet understudied microbial 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 …
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Treatment of High-Strength Nitrogen Wasetewater With a Hollow-Fiber Membrane-Aerated Biofilm Reactor: A Comprehensive Evaluation
… oxygen concentrations. Compared to offgas oxygen analysis from the HFMBR while in operation with biofilm growing, the model overpredicted mass transfer by a factor of approximately 1.3. This was in contrast to empirical mass transfer coefficient-based methods, which were determined using either …
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Assessing the Impacts of Silver Nanoparticles on the Growth, Diversity, and Function of Wastewater Bacteria
… washing machines, and textiles, due to their antimicrobial properties [1]. However, despite the beneficial applications of AgNPs into consumer products, it is likely that their use will facilitate the release of AgNPs into wastewater treatment plants, thereby possibly negatively impacting key …
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Growth of mixed cultures of moderate thermophiles for commercial heap bioleaching of low-grade copper-sulphide ores
… heap requires a fundamental understanding of microbial growth on the ore at different temperature ranges. Furthermore, successful preparation and maintenance of suitable inocula also requires an understanding of culture conditions that could affect the micro-organisms in the stock cultures. …