Ultraviolet disinfection of unfiltered water supplies : exploring effects of particle-microorganism association and efficiency enhancement strategies
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Soleimanpour Makuei, Mehrnaz
issued: 2024-05-27T15:46:46Z
issued: 2024
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Traditional quality indicators used in water treatment facilities have limitations in assessing particle-related challenges and system performance under challenging conditions. This study seeks to explore the impacts of particle-microorganism interactions on ultraviolet (UV) disinfection performance, identify water quality indicators that best describe performance, and suggest innovative methodologies to mitigate these effects on disinfection performance. Several sampling points of two full-scale treatment plants, receiving surface water without filtration, were monitored to identify the impacts of particulates on UV performance. The research established a link between zeta potential or surface charge and disinfection effectiveness and results suggest that conventional water quality indicators do not adequately capture particle effects on UV disinfection. An examination of methods for detecting particle-microorganism associations was conducted to devise an experimental approach in line with contemporary research directions and supported by a reasonable theoretical foundation. To further explore the impact of challenging source conditions on UV disinfection, the second objective was to study a wider variety of water conditions. Results suggested that disinfection could be compromised even at low turbidities (< 1 NTU), depending on the water matrices. Furthermore, complex interactions with background source water quality and additional particulate and dissolved matters were observed and suggested that non-specific indicators (turbidity or UVT) as opposed to specific indicators (zeta potential) should be used with caution when predicting the UV performance specifically under challenging conditions. Overall, zeta potential enhanced UV disinfection predictability. The observed influence of zeta potential on UV performance led to proposing a UV enhancement strategy in relation to problems regarding particles. A new line of study was started to identify if manipulating par…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/88374
note: ULTRAVIOLET DISINFECTION OF UNFILTERED WATER SUPPLIES: EXPLORING EFFECTS OF PARTICLE-MICROORGANISM ASSOCIATION AND EFFICIENCY ENHANCEMENT STRATEGIES by Mehrnaz Soleimanpour Makuei M.Sc., Amirkabir University of Technology, 2019 A DISSERTATION SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) May 2024 © Mehrnaz Soleimanpour Makuei, 2024 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a dissertation entitled: ULTRAVIOLET DISINFECTION OF UNFILTERED WATER SUPPLIES: EXPLORING EFFECTS OF PARTICLE-MICROORGANISM ASSOCIATION AND EFFICIENCY ENHANCEMENT STRATEGIES submitted by Mehrnaz Soleimanpour Makuei in partial fulfillment of the requirements of the degree of Doctor of Philosophy. Dr. Nicolas Peleato, School of Engineering Supervisor Dr. Deborah Roberts, School of Engineering, University of Northern British Columbia Supervisory Committee Member Dr. Alyse Kiesser, School of Engineering Supervisory Committee Member Dr. Joshua Brinkerhoff , School of Engineering University Examiner Dr. Caetano Dorea, Department of Civil Engineering, University of Victoria External Examiner iii Abstract Traditional quality indicators used in water treatment facilities have limitations in assessing particle-related challenges and system performance under challenging conditions. This study seeks to explore the impacts of particle-microorganism interactions on ultraviolet (UV) disinfection performance, identify water quality indicators that best describe performance, and suggest innovative methodologies to mitigate these effects on disinfection performance. Several sampling points of two full-scale treatment plants, receiving surface water without filtration, were monitored to identify the impacts of particulates on UV performance. The research established a link between zeta potent…
has type: Thesis/Dissertation
date issued: 2024-09
is shown at: 10.14288/1.0443800
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Peleato, Nicolas M.
type: Text
identifier URI: http://hdl.handle.net/2429/88374