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 consortium"”.
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Microbial Dynamics and Mechanistic Insights into a Hydrogenotrophic Denitrifying Microbial Consortium
… greenhouse gases (N2O and CO2). This is due to microbial competition for limited organic electron donors such as methanol and acetate. Recently, autotrophic denitrification using hydrogen as a clean electron donor, also known as “hydrogenotrophic denitrification”, has garnered increasing …
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Investigation of polyhydroxyalkanoate production by an activated sludge microbial consortium treating artificial dairy wastewater
… non-renewable materials and are resistant to microbial degradation in the environment. Considerable research has therefore been carried out into the production of sustainable, biodegradable polymers, amenable to microbial catabolism to CO2 and H2O. A key group of microbial polyesters, widely …
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An Investigation of the Biochemistry of Biological Phosphorus Removal
… understanding of the biochemical mechanisms and microbial population dynamics that determine the reliability and efficiency of EBPR, and the utilization of this information to improve the design and operation of BNR plants. Such knowledge will also contribute to better structure of modeling tools …
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Direct and indirect photoreactions of chromophoric dissolved organic matter : roles of reactive oxygen species and iron
… the bioavailability of this material to a microbial consortium. Both direct and indirect photochemical processes are expected to be accelerated by the presence of iron.
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Coalbed gas origin and distribution in the southeastern Illinois Basin
… coals where uplift and brine dilution initiated microbial methanogenesis. Distributions and compositions of gases in biogenic systems are governed by numerous factors including salinity, microbe-accessible porosity, and coal permeability. In contrast, thermogenic gas systems are primarily …
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The Role of Gut Microbiota Urease in the Host With Liver Disease
… the inoculation of a urease-free bacterial consortium. We show that we are able to engineer the gut microbiota to reduce fecal urease activity and ammonia levels in mice. Depletion of the endogenous gut microbiota followed by transplantation with Altered Schaedler Flora (ASF), a defined …
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An Integrated Approach to Improving Efficiency in Photosynthetic Microbial Systems
… cyanobacteria in biotechnology. A photosynthetic microbial mat, sourced from highly productive haloalkaline soda lakes, was previously used as inoculum for enrichment of a mono-cyanobacterial microbial consortium. In this thesis, the microbial composition and function of the productive …
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Sustainability of reductive dechlorination at chlorinated solvent contaminated sites: Methods to evaluate biodegradable natural organic carbon
… extractable organic carbon can be utilized by a microbial consortium. Alternating between 0.1% pyrophosphate and base solutions over multiple extractions increased the rate of removal efficiency and targeted two organic carbon pools. The result of the investigation was a laboratory method to …
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Ultrasonically Enhanced Mass Transport and Degradation of Polycyclic Aromatic Hydrocarbons in Solid-Liquid Two Phase Partitioning Systems
… for environmental applications. A PAH-degrading microbial consortium was enriched, and it was demonstrated that sonication also improved the rate of phenanthrene degradation delivered from Desmopan by four times, confirming transport improvements while minimizing cellular inactivation effects. A …
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Strategies for engineering microbial communities
… nutrients (i.e., metabolic interactions) shape microbial community structure and dynamics, the ability to reliably predict the metabolic interactions and their effect on microbial communities is still being studied. This dissertation investigates how metabolism and environment shape microbial …
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A study of chemolithoautotrophic bacterial rhodanese, and its potential contribution to cyanide wastage during cyanidation of biooxidized concentrates
… Therefore, the most relevant members of the microbial consortium responsible for biooxidation of gold-bearing ores or concentrates were investigated to determine whether they were able to contribute to thiocyanate formation by means of a enzyme reaction mechanism indicative of rhodanese. …
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Uji viabilitas konsorsium bakteri biodekomposer selama dua bulan guna menentukan waktu inokulum yang optimal
… is a formula that contains cellulose degrading microbial consortium that functions in the overhaul of biological organic materials made specifically to improve the efficiency of decomposition of organic matter plant. Activity of microbial consortia remodel and convert the cellulose and lignin …
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The effect of microbial load and water recycling on the flotation performance of a PGM bearing ore
… employed in sulphide mineral beneficiation, on microbial growth were also considered. Results suggest that the presence of microbial cells and recycling of flotation waters increase water and solids recovery, while the metal grade recoveries were negatively affected. The microbial community used …
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Simultaneous Degradation of Toxic and Volatile Substrates by Two Phase Partitioning Bioreactor Systems: Performance Characterization and Rational Polymer Selection
… concentrations, toxic contaminants induce microbial inhibition, which results in an overall decrease of reaction rates. On the other hand, volatile compounds are often stripped out of solution into the atmosphere during aeration in conventional wastewater treatments, and are not treated. …
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Bioaugmentation and biostimulation of a South African coal-based Technosol as a mine rehabilitation strategy
… availability and establishing an appropriate microbial consortium. This study investigated the improvement of Technosol fertility through biostimulation and bioaugmentation. By introducing a diverse microbial community, typically associated with healthy soils and initially absent in mine …
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The effect of pH and dissolved organic carbon on the growth kinetics of Ac. cupricumulans JTC3 and L. ferriphilum HT pertinent to the BIOX® process
… commercially. An iron- and sulfur-oxidizing microbial consortium provide lixiviants for dissolution of mineral sulfides. The autotrophic iron-oxidizing bacterium, Leptospirillum ferriphilum HT, has been regarded as the dominant iron-oxidizer within the BIOX® culture since establishing this …
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STUDY OF BIOGASIFICATION OF COAL TO METHANE FOR EX SITU AND IN SITU APPLICATIONS
… The first part of the dissertation characterized microbial communities dedicated for conversion of coal to methane in situ and ex situ. To enhance methane production in situ in bituminous coal seams, distribution of microorganisms in the formation water collected from a coalbed methane well (CBM) …
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Identifikasi bakteri probiotik yang berpotensi sebagai bahan biodekomposer
… bioactivator (Biodecomposer) derived from microbial consortium in the form of probiotics. For further biodecomposer development, needs to be done by a microbiological analysis of the content of microbes in a consortium with how to conduct research on the identification of potentially as a …
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Elucidating the Response of Activated Sludge Cultures to Toxic Chemicals at the Process, Floc and Metabolic Scales
Activated sludge treatment systems rely on a microbial consortium structurally organized in bioflocs to treat pollutants present in wastewater. The treatment process efficiency in these systems can be severely affected by toxic chemicals present in the influent wastewater. The effects of chemical …
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Exploring the factors at play to make wastewater biorefineries a reality
… enrichment through, ecological selection of the microbial consortium with simultaneous cell retention through reactor design and operation. Four groupings of unit operations were reviewed in detail and evaluated with regards to their suitability to the wastewater biorefinery, using a two-part set …