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 30 for “"biological wastewater treatment"”.
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Fate and Effect of Peracetic Acid Solutions on Biological Wastewater Treatment Systems
… to control food-borne pathogens. Upsets of biological wastewater treatment processes and failures of whole effluent toxicity (WET) tests have been reported as potentially caused by the excessive use of PAA solutions. However, information related to the fate and effect of PAA on biological …
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Investigating the relationship between nitrification and pathogen reduction in biological wastewater treatment systems
… was conducted to assess the potential of biological wastewater treatment systems in contributing to disinfection of municipal wastewater. The research focused on the microbial mediated processes occurring at secondary treatment and their effect on faecal coliform and E. coli numbers. The …
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An exploratory investigation of crossflow microfiltration for solid/liquid separation in biological wastewater treatment
… (CFMF) for solid/liquid separation in biological wastewater treatment systems. The principal objective of the study was to assess the influence of CFMF on the performance of identified biological wastewater treatment systems. It was not the objective to optimise filtration performance. …
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Elucidating the Role of Toxin-Induced Microbial Stress Responses in Biological Wastewater Treatment Process Upset
… indicator of process upset in biological wastewater treatment systems that receive sporadic shock loads of toxic chemicals. The microbial stress response is a set of conserved and unique biochemical mechanisms that an organism activates or induces under adverse conditions, …
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Applications of aerobic and anaerobic bacteria in the fields of biological degradation of contaminants and biological wastewater treatment
… the commissioning of an industrial aerobic Wastewater Treatment Plant and the Implementation of biological Nitrogen- and Phosphate removal in this Wastewater Treatment Plant. Since the chemical Structure of DCE and DDE have certain similarities, Bacteria that were capable of degrading DCE, …
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Fate and effect of amoxicillin in space and terrestrial water reclamation systems
… strives towards long-term manned space travel, wastewater recycling will be necessary to provide adequate water. Contaminants, including pharmaceuticals, may be present if astronauts take medications. The overall effects of pharmaceuticals, specifically antibiotics, in recycled wastewater are …
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Evaluation wastewater treatment technologies at Ford Powertrain
… Free Oil & Grease (FOG) and metal ion content in wastewater effluent, a study was performed for Ford Motor Company that assesses various seconctary wastewater treatment technologies. The three water purification technologies, membrane filtration, biological treatment, and clay media adsorption, …
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Lipid Productivity of Algae Grown on Dairy Wastewater as a Possible Feedstock for Biodiesel
The objective of this thesis is to develop a biological wastewater treatment system that utilizes algal growth to simultaneously create renewable energy in the form of biodiesel and digester biogas, remove polluting nutrients, and abate greenhouse gases. Research under the Department of Energy …
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Effect of mean cell residence time on the acid hydrolytic assist activated sludge process
Handling and disposal of residual solids from wastewater treatment plants is an expensive and difficult task. The acid hydrolytic assist activated sludge process is one method of minimizing sludge production from a biological wastewater treatment process. Acid hydrolysis of waste sludge involves pH …
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An Investigation into the Mechanisms of Sludge Reduction Technologies
… for reducing and stabilizing waste sludge from biological wastewater treatment for over a century; however, as sludge volumes and disposal costs increase, there has been a desire to develop various methods for reducing the volume of sludge to be treated, improving the performance of the …
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Shedding Light on Decay Kinetics of Critical Wastewater Bacteria with Molecular Tools
Decay kinetics of bacteria in biological wastewater treatment systems are vital to efficient design and operation of treatment plants. Of special concern are decay characteristics of fecal indicator organisms, which can aid design of wastewater treatment processes to eliminate fecal pathogens. This …
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Evaluating the Fate of Manure Nitrogen in Confined Dairy Waste Operations: a Full-Scale Waste Analysis and Start-Up Protocol for an Anammox-Based Treatment Technology Applicable to Dairy Waste Management
… of ammonium nitrogen from dairy waste, a novel biological wastewater treatment process, utilizing anaerobic ammonium oxidation (anammox), referred to as Oxygen-Limited Autotrophic Nitrification and Denitrification (OLAND) was examined. Due to the potential use of OLAND-based systems in dairy …
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Removals of sulfonamide and trimethoprim antibiotics in municipal wastewater by biological treatment processes
… strains of bacteria. Although conventional wastewater treatment processes were not designed to eliminate trace chemical contaminants including antibiotics, selection of appropriate treatment processes and optimization of their operational conditions may enhance the removal of many of these …
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Investigation into the start-up and operation of upflow anaerobic sludge bed reactors
High-rate anaerobic biological wastewater treatment using the upflow anaerobic sludge bed (UASB) reactor technology offers the potential to reform wastewater treatment. However, the lack of clarity regarding the mechanisms responsible for self-immobilisation of the microbial consortia involved, …
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Development of sorption technology for the cleanup of pesticide contaminated wastewater
… groundwater. There is a need for simple, on site wastewater cleanup procedures to minimize pollution caused by spills and improper disposal of pesticide wastes by pesticide applicators and farmers. Sorption technology may prove a viable alternative to biological wastewater treatment. Properties of …
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Investigating human pharmaceutical compounds present in municipal and hospital wastewaters and options for their removal
… the removal efficiencies of these compounds in biological wastewater treatment plants (WWTPs) under different environmental conditions. Of the pharmaceutical compounds selected for this study, the highest influent concentrations measured in municipal wastewater treatment plants (MWWTPs) were for …
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Development of Kinetic Parameterization Methods for Nitrifying Bacteria using Respirometry
… understanding of low DO operations in full-scale biological wastewater treatment. Previous methods to observe nitrifier oxygen kinetics do exist in literature, however they are inefficient and labor intensive. Other more efficient methods require the use of selective inhibitors, which alter the …
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Optimizing wastewater treatment sampling strategies through Markov Chain Monte Carlo Bayesian inference in Activated Sludge Model No. 3
… provide mechanistic frameworks for understanding biological wastewater treatment processes, but their practical implementation remains constrained by challenges in parameter estimation and uncertainty quantification under realistic monitoring conditions. This thesis develops a comprehensive …
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Fate and Transport of Endocrine Disrupting Compounds during Wastewater Treatment: The Role of Colloidal and Particulate Material
The presence of biologically-active estrogenic endocrine disrupting compounds (EDCs) in treated effluents from biological wastewater treatment facilities has prompted wide-spread interest in the behavior of these contaminants during the activated sludge process. The yeast-estrogen screen (YES) was …
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