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 361 for “"Disinfection"”.
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Disinfection of Foodborne Bacteria using the Contamination Sanitization Inspection and Disinfection (CSI-D) Device
… The Contamination Sanitization Inspection and Disinfection (CSI-D) device is a new handheld fluorescence-based imaging system designed to disinfect food contact surfaces contaminated with microorganisms using ultraviolet-C (UVC) illumination. This study aimed to determine the optimal parameters …
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UV Disinfection between Concentric Cylinders
… the most resistant pathogens. Ultraviolet (UV) disinfection is one of the promising methods to reach this 5-log reduction of pathogens. The absorption coefficients of juices typically vary from 10 to 40 1/cm and can be even higher depending on brand and processing conditions. Thin film reactors …
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Wastewater Disinfection with HYDROFLOW Technology
<p>Disinfection is the final and very important step of wastewater treatment to maintain healthy ecosystems. Although chlorination is the most prevalent wastewater disinfection method, there are serious safety concerns and ecological problems associated with its use. The purpose of this study was …
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Electro-disinfection of Ballast Water
This research validates electro-disinfection as a potential secondary ballast water treatment technology. Electricity applied to bacteria laden water produced bactericidal effects, reactive oxygen species and chlorine generation which annihilated bacteria. Evaluation of electro-disinfection …
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Disinfection by-products and prenatal development
… studies have suggested modes of action for disinfection by-product (DBP) toxicity or teratogenicity, there is little evidence for a causal relationship between DBPs and induction of adverse outcomes in humans. This may be due, in part, to biases inherent to exposure assessment or analytical …
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DISINFECTION USING A NOVEL HETEROGENEOUS CATALYST
… of H2O2 used and the time taken for disinfection. The antimicrobial properties of an iron based novel heterogeneous polyacrylonitrile catalyst (PCat) were examined against Escherichia coli ATCC 10536, Pseudomonas aeruginosa ATCC 15442 and Staphylococcus aureus ATCC 6538 using a …
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Novel Endodontic Disinfection Approach Using Nanotechnology
The aim of this in vitro investigation was to use a recently developed Enterococcus faecalis infection model using root canal for evaluating iron oxide (Fe3O4) nanoparticles (NP) with biomimetic (catalytic) properties as a new antimicrobial endodontic treatment. We compared iron oxide NP …
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Polymer-supported reagents for disinfection of water
A macroporous poly(styrene-co-divinylbenzene) resin having redox N,N-dichlorosulfonamide group, was modified for use in small-scale chlorination of potable water. The resin was synthesized via sulfonyl chloride by modification of the strong acid cation exchange resin, Amberlyst-15. The products …
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Sodium hypochlorite generation for household water disinfection in Haiti
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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Application of Natural Convection for Photovoltaic Cooling and Photocatalytic Disinfection
Two investigations for improving renewable technologies are engaged. First is the examination of the enhancement of heat transfer at the rear of a hot photovoltaic panel by natural convection using various configurations and the other is analyzing a new photocatalytic collector for water heating …
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Management of disinfection byproduct production in small drinking water systems
… OF MISSOURI AT AUTHOR'S REQUEST.] Two groups of disinfection byproducts (DBPs) currently regulated in drinking water are trihalomethanes (THMs) and haloacetic acids (HAAs). The objective of this research was to better understand how the water treatment processes employed at four smaller municipal …
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Disinfection of wastewater for reuse using microchannel plasma ozone generator
… and exposure duration) concept for wastewater disinfection using ozone appeared to be valid. A framework to derive wastewater-specific CT equations was therefore developed to predict ozone inactivation of L. pneumophila. Temperature was found to affect L. pneumophila inactivation only in the …
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Comparative Cytotoxicity and Genotoxicity of Drinking Water Disinfection by -Products
The quantitative rank order of the cytotoxicity and genotoxicity of the DBPs showed that brominated haloacetic acids were more genotoxic than their chlorinated analogs in mammalian cells. The difference in the responses to DBPs by bacterial and mammalian cells suggests that the relative risks based …
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Antimicrobial Materials for Water Disinfection Based on Visible-Light Photocatalysts
… application of the photocatalyst in water disinfection was demonstrated by flow-through tests.
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Kinetics and Speciation of Brominated Disinfection by -Products During Ozonation
Then, to further investigate the kinetics of organic bromine formation, the combination of a sequential stopped-flow analysis and a specific and sensitive probe for HOBr, an ABTS method, was introduced. This new method determined the reaction rates of HOBr with phenolic compounds, one of the major …
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Solar disinfection for point of use water treatment in Haiti
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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