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Disinfection of particle-associated viruses by ultraviolet

Viruses are frequently attached onto a variety of particles in natural waters and wastewaters, however relatively little is known about the impact of this viral particleassociation on water treatment processes. This thesis focuses on the impact of particleassociated viruses on ultraviolet (UV) disin...

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Main Author: Ghasemzadehfahani, Siamak
Format: Thesis
Published: 2012
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/30733/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:73532?queryType=vitalDismax&query=Disinfection+of+particle-associated+viruses+by+ultraviolet
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spelling my.utm.307332017-09-19T00:48:40Z http://eprints.utm.my/id/eprint/30733/ Disinfection of particle-associated viruses by ultraviolet Ghasemzadehfahani, Siamak TJ Mechanical engineering and machinery Viruses are frequently attached onto a variety of particles in natural waters and wastewaters, however relatively little is known about the impact of this viral particleassociation on water treatment processes. This thesis focuses on the impact of particleassociated viruses on ultraviolet (UV) disinfection. Particles smaller than 2 (µm) in diameter were shown to be large enough to protect bacteriophages MS2 and T4 (model viruses) from UV light. This is smaller than the minimum particle size of 7-10 µm for the shielding of coliform bacteria from the UV disinfection of wastewater. In addition, particulate chemical composition, specifically UV-absorbing content such as organic compounds, was a critical factor in the survival of particle-associated bacteriophages exposed to UV light. Particles such as humic acid floe and activated sludge floe were observed to protect attached phage from UV light. The research findings also re-emphasize that viral disinfection studies should account for particle-associated viruses using techniques such as the physico-chemical blending method that was used in this research, since failure to do so can result in significant underestimation of the true virus concentrations. Further, multiple viral surrogates should be used in experimental studies whenever possible, since viruses vary significantly in their sizes, shapes, and surface charges, all of which can influence the adsorption of viruses to particles. 2012 Thesis NonPeerReviewed Ghasemzadehfahani, Siamak (2012) Disinfection of particle-associated viruses by ultraviolet. Masters thesis, Universiti Teknologi Malaysia, Faculty of Mechanical Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:73532?queryType=vitalDismax&query=Disinfection+of+particle-associated+viruses+by+ultraviolet
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Ghasemzadehfahani, Siamak
Disinfection of particle-associated viruses by ultraviolet
description Viruses are frequently attached onto a variety of particles in natural waters and wastewaters, however relatively little is known about the impact of this viral particleassociation on water treatment processes. This thesis focuses on the impact of particleassociated viruses on ultraviolet (UV) disinfection. Particles smaller than 2 (µm) in diameter were shown to be large enough to protect bacteriophages MS2 and T4 (model viruses) from UV light. This is smaller than the minimum particle size of 7-10 µm for the shielding of coliform bacteria from the UV disinfection of wastewater. In addition, particulate chemical composition, specifically UV-absorbing content such as organic compounds, was a critical factor in the survival of particle-associated bacteriophages exposed to UV light. Particles such as humic acid floe and activated sludge floe were observed to protect attached phage from UV light. The research findings also re-emphasize that viral disinfection studies should account for particle-associated viruses using techniques such as the physico-chemical blending method that was used in this research, since failure to do so can result in significant underestimation of the true virus concentrations. Further, multiple viral surrogates should be used in experimental studies whenever possible, since viruses vary significantly in their sizes, shapes, and surface charges, all of which can influence the adsorption of viruses to particles.
format Thesis
author Ghasemzadehfahani, Siamak
author_facet Ghasemzadehfahani, Siamak
author_sort Ghasemzadehfahani, Siamak
title Disinfection of particle-associated viruses by ultraviolet
title_short Disinfection of particle-associated viruses by ultraviolet
title_full Disinfection of particle-associated viruses by ultraviolet
title_fullStr Disinfection of particle-associated viruses by ultraviolet
title_full_unstemmed Disinfection of particle-associated viruses by ultraviolet
title_sort disinfection of particle-associated viruses by ultraviolet
publishDate 2012
url http://eprints.utm.my/id/eprint/30733/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:73532?queryType=vitalDismax&query=Disinfection+of+particle-associated+viruses+by+ultraviolet
_version_ 1643648621509345280
score 13.211869

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