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 14 of 14 for “"pathogen reduction"”.
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Validating Pathogen Reduction in Ozone-Biofiltration Water Reuse Applications
… validation of treatment goals including pathogen reduction. While there are many constituents of concern in water reuse, exposure to pathogens remains the greatest acute health risk. The studies described herein examine pathogen and microbial surrogate reduction both full-scale and …
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Advanced aerobic digestion to optimize pathogen reduction: Staged pre-treatment in aerobic digestion
… raises public concern regarding the fate of pathogens following land application. The main goal of this work was to determine a plan to help an aerobic digestion WWTP achieve improved pathogen destruction. An approach of studying the effect of a pre-treatment step prior to digestion was …
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Investigating the relationship between nitrification and pathogen reduction in biological wastewater treatment systems
… the concurrent occurrence of nitrification and pathogen reduction processes at secondary treatment stage during the treatment process of municipal wastewater in which nitrogen and pathogens are already important pollutants of concern of domestic source. Specifically, the research was seeking to …
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The Effect of Steady-State Digestion Temperature on the Performance, Stability, and Biosolids Odor Production associated with Thermophilic Anaerobic Digestion
… outcomes such as the deactivation of human pathogens, these parameters have been shown to have a broad impact on the overall sludge digestion process. Since the current time-temperature requirements for biosolids pathogen reduction are most easily met at elevated digestion temperatures …
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Effects of Cavitation on the Removal and Inactivation of Listeria and Salmonella from the Surface of Tomatoes and Cantaloupe
… been identified as the source of bacterial pathogens that can cause human illnesses, including listeriosis and salmonellosis. Microbial pathogens may attach and form biofilms on raw fruit surfaces and can be difficult to remove. A cavitation process (formation of bubbles in water) was …
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Expanding inducible epithelial resistance against pneumonia: novel virus, novel receptor
… is necessary and sufficient to produce a pathogen-killing but self-protective environment to prevent severe disease. Inducible resistance is pathogen-agnostic and has been demonstrated against an array of respiratory infections. We achieve this using a combination of pattern recognition …
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Pathogen Removal by Secondary and Advanced Water Reclamation for Water Reuse
… although, there is uncertainty regarding the reduction of waterborne pathogens. Common pathogen log reduction requirements have been modeled after California Department of Drinking Water's 12-10-10 log reduction value (LRV) for enteric virus, Cryptosporidium and Giardia, respectively, based on …
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The Impacts of Administering Metabolites of Saccharomyces cerevisiae on Broiler Performance, Yields and Salmonella Content of Component Portions
… more recent research to reduce colonization of pathogenic bacteria in the host organism’s gastro-intestinal tract. In this dissertation, the impacts of administering a functional ingredient containing Saccharomyces cerevisiae metabolites on broiler performance measures and pathogen reduction …
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Effect of Process Intensification Techniques on Biosolids Management
… pretreatment. Improved methane production, pathogen reduction, dewatering performance, and odor mitigation were observed with the involvement of these high-temperature processes. However, special cautions and measure should be taken during the start-up of these high rate processes as they …
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Identification of food safety risks at Virginia farmers' markets and development of a food safety plan to help farmers market managers
… respectively). Additionally, one or more target pathogen was isolated from 28 farmers' market samples and 16 retail grocery store samples. The observed risky food safety behaviors along with the bacterial data collected emphasize the need for a pathogen reduction focus on fresh produce not only …
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Optimization of Point-of-Use Water Treatment Device for Disaster Relief
… drinking water guidelines, but did not meet the pathogen reduction requirements of the U.S. EPA Guide Standard and Protocol for Testing Microbiological Water Purifiers.</p> <p>A second (Mark II) version, with internal mixing baffles and a microfilter, was developed to overcome the inability of …
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Effect of Standard Post-harvest Interventions of Fresh Vegetables on Bacterial Community Dynamics, Pathogen Survival and Antibiotic Resistance
… as soil amendments is an established source of pathogenic bacterial contamination. However, less is known about whether such soil amendments could serve as a source of transmission of antibiotic-resistant bacteria (ARB) or antibiotic-resistance genes (ARGs) via fresh produce. As such knowledge …
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Validation of Pathogen Surrogate Escherichia coli strains for Systemic Microbial Reductions in Fresh Beef Harvest and Processing
… to determine the overall level of bacterial reduction by multiple interventions over a two-day period. ATCC non-pathogenic surrogate strains of E.coli were utilized in this study to mimic the behavior of Salmonella and E.coli. Foreshanks of beef carcasses were inoculated a total of two times …