Index Catalog // ScholarsArchive@OSU

Effects of substrate interactions, toxicity, and bacterial response during cometabolism of chlorinted solvents by nitrifying bacteria

Creator:: Ely, Roger L.
Abstract:: Cometabolic biodegradation processes, important for bioremediation of hazardous waste sites, are not well understood and have not been modeled thoroughly. Toxic effects and bacterial responses to toxicity may change intracellular enzyme levels, rendering traditional enzyme kinetics models inappropriate. This document presents a novel cometabolic enzyme kinetics model that incorporates enzyme...
Resource Type:: Dissertation
Full Text:: throughout this project. I would also like to acknowledge and thank committee members Dr. Lewis Semprini

Reverse osmosis membranes fouling by biopolymers in wastewater secondary effluent and membrane cleaning

Creator:: Xu, Zhihua
Abstract:: Reverse osmosis (RO) is being increasingly used in treatment of domestic wastewater secondary effluent for potable and non-potable reuse. Among other foulants, dissolved biopolymers, i.e., proteins and polysaccharides, can lead to severe fouling of RO membranes. In this study, the roles of RO membrane surface properties in membrane fouling by...
Resource Type:: Masters Thesis
Full Text:: members of my committee, Professors Lewis Semprini and Mark Dolan, for devoting their valuable time to

Pentacholorophenol reductive dechlorination and the significance of temperature : development of an interceptor trench technology

Creator:: Cole, Jason David
Resource Type:: Masters Thesis
Full Text:: degree. Dr. Kenneth Williamson my minor professor and committee member Dr. Lewis Semprini, for the

The effectiveness of cockpit task management training on task prioritization performance in simulated flight

Creator:: Bishara, Saher A.
Abstract:: The cockpit is an environment in which many important tasks simultaneously compete for pilot attention. Cockpit Task Management (CTM) is the process by which pilots selectively attend to flight tasks in such a way as to safely and effectively complete a flight. CTM has been categorized as a mental function...
Resource Type:: Masters Thesis
Full Text:: like to thank my committee for their time and advice. Dr. Jeffrey Woldstad and Dr. Lewis Semprini both

The Effect of Flowrate on Trapping in a Two-phase System as it Relates to CO₂ Sequestration

Creator:: Williams, Kristal A.
Abstract:: This research examines the independent and combined effects of drainage and imbibition flowrate on nonwetting phase capillary trapping in a two-phase, porous medium system. A uniform system of cubic arrangement and non-uniform systems of both cubic and rhombohedral arrangements were examined in order to analyze and compare the nonwetting phase...
Resource Type:: Masters Thesis

Effect of Landfill Leachate Pretreatment and SBR Operational Parameters on Nitrification Efficiency and Activated Sludge Microbial Populations

Creator:: Miller, Kierstin M.
Abstract:: A year-long, bench-scale treatability study was performed to assess whether an activated sludge sequencing batch reactor could be used to treat an influent stream of 50/50 (v/v) municipal wastewater and landfill leachate to discharge standards established by the Oregon Department of Environmental Quality. One primary obstacle that was exposed during...
Resource Type:: Masters Thesis

Molecular and Kinetic Characterization of Anammox Bacteria Enrichments and Determination of the Suitability of Anammox for Landfill Leachate Treatment

Creator:: Sultana, Sharmin
Abstract:: Anaerobic ammonium oxidation (anammox) has recently appeared as a promising approach for removing nitrogen from landfill leachates because it requires less oxygen and no organic carbon compared to traditional nitrification-denitrification system, and it produces low sludge volumes, thereby reducing operating and biological sludge disposal costs by over 60%. Anammox bacteria...
Resource Type:: Masters Thesis
Full Text:: my graduate school life. I would like to thank Dr. Semprini, Dr. Dolan and Ms. Berger for being

Anaerobic reductive dechlorination of TCE and TCFE in TCE contaminated sediments : enhanced bioremediation and bioaugmentation

Creator:: Lee, Jae-Hyuk
Abstract:: This research focused on the enhanced reductive dechlorination of trichloroethene (TCE) and its surrogate, trichlorofluoroethene (TCFE), using two bioremediation methods in anaerobic conditions. Two anaerobic bioremediation studies were conducted to investigate the effects of microbial communities in the presence of different electron acceptors and donors during anaerobic reductive dechlorination of...
Resource Type:: Dissertation
Full Text:: research. I would also like to thank my committee members, Drs. Lewis Semprini, Peter Bottomley, and J

Low Level Quantification of 1,4-Dioxane and Investigation of 1,4-Dioxane Co-Metabolism by Mycobacterium sp. 1A.

Creator:: McKeage, Kevin J.
Abstract:: 1,4-Dioxane (dioxane) is a probable human carcinogen and is often found comingled with chlorinated aliphatic hydrocarbon (CAH) contamination since dioxane is used as a stabilizer in CAH solutions. Dioxane is miscible in water, has a low K[subscript ow], low H[subscript cc], and is highly recalcitrant in the environment. The presence...
Resource Type:: Masters Thesis
Full Text:: ACKNOWLEDGEMENTS I would like to express my gratitude to both Dr. Lewis Semprini and Dr. Tyler Radniecki for

Physiological response of Nitrosomonas europaea to oxytetracycline, chromium, and silver

Creator:: Schaerer, Morgan A.
Abstract:: Nitrosomonas europaea carries out the first step in the biological nitrogen removal process in wastewater treatment by oxidizing ammonia to nitrite. It has been shown to be sensitive to a wide range of contaminants. The antibiotic oxytetracycline and the heavy metals chromium and silver have been found in wastewater influent....
Resource Type:: Masters Thesis
Full Text:: , Tyler S.; Dolan, Mark; Semprini, Lewis, 2008; Radniecki, Dolan, & Semprini, 2008; Stein & Arp, 1998

ScholarsArchive@OSU

Effects of substrate interactions, toxicity, and bacterial response during cometabolism of chlorinted solvents by nitrifying bacteria

Reverse osmosis membranes fouling by biopolymers in wastewater secondary effluent and membrane cleaning

Pentacholorophenol reductive dechlorination and the significance of temperature : development of an interceptor trench technology

The effectiveness of cockpit task management training on task prioritization performance in simulated flight

The Effect of Flowrate on Trapping in a Two-phase System as it Relates to CO₂ Sequestration

Effect of Landfill Leachate Pretreatment and SBR Operational Parameters on Nitrification Efficiency and Activated Sludge Microbial Populations

Molecular and Kinetic Characterization of Anammox Bacteria Enrichments and Determination of the Suitability of Anammox for Landfill Leachate Treatment

Anaerobic reductive dechlorination of TCE and TCFE in TCE contaminated sediments : enhanced bioremediation and bioaugmentation

Low Level Quantification of 1,4-Dioxane and Investigation of 1,4-Dioxane Co-Metabolism by Mycobacterium sp. 1A.

Physiological response of Nitrosomonas europaea to oxytetracycline, chromium, and silver

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