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Description
Title: | Simulation on particle adhesion on simulated and modified drinking water biofilms |
Author(s): | Huang, Conghui |
Advisor(s): | Nguyen, Thanh H. |
Department / Program: | Civil & Environmental Engineering |
Discipline: | Civil & Environmental Engineering |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | M.S. |
Genre: | Thesis |
Subject(s): | drinking water biofilm
simulation particle deposition |
Abstract: | Biofilms, commonly found in drinking water distribution system (DWDS), play an important role in pathogens transportation and persistent and raise concern on drinking water safety. They can harbor opportunistic pathogen from disinfectants added to control pathogen. Since bacterial adhesion is the prerequisite for further propagation, understanding the mechanisms of bacterial adhesion on biofilm surface is important to prevent pathogen adhesion and reduce the risk to exposure in DWDS. In this study, bacterial size particles were used to model bacterial adhesion on simulated drinking water biofilms surfaces. Simulations on effects of Brownian motion and drag force on adhesion mechanism were conducted using COMSOL Multiphysics. The role of surface topography and roughness on particle deposition were determined through simulations on biofilm surfaces and artificial surfaces maintaining roughness or topography similar to biofilms. The simulation results showed that surface topography instead of roughness and associated hydrodynamic condition can affect particle adhesion tendency. Spatial analysis through semivariogram showed that the deposition location was not dominated by surface structure. |
Issue Date: | 2015-12-11 |
Type: | Text |
URI: | http://hdl.handle.net/2142/89239 |
Rights Information: | Copyright 2015 Conghui Huang |
Date Available in IDEALS: | 2016-03-02 2018-03-03 |
Date Deposited: | 2015-12 |
This item appears in the following Collection(s)
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Dissertations and Theses - Civil and Environmental Engineering
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Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois