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...

Full description

Saved in:

Bibliographic Details
Main Author:	Ghasemzadehfahani, Siamak
Format:	Thesis
Published:	2012
Subjects:	TJ Mechanical engineering and machinery
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.30733
record_format	uketd_dc
spelling	my-utm-ep.307332017-09-19T00:48:40Z Disinfection of particle-associated viruses by ultraviolet 2012 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 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 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
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
qualification_level	Master's degree
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
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2012
_version_	1747815735114072064

Disinfection of particle-associated viruses by ultraviolet

Similar Items