Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/119630
Title: THE STUDY OF ULTRAVIOLET BASED ADVANCED OXIDATION MODELING PROCESSES: OXIDATION AND DISINFECTION FOR DRINKING WATER TREATMENT
Authors: NANDAR KYAW
Keywords: Peroxide and persulfate, Advanced oxidation process, UV disinfection, Reactor design, Intermediate product, Computational Fluid Dynamics (CFD)
Issue Date: 20-Aug-2013
Citation: NANDAR KYAW (2013-08-20). THE STUDY OF ULTRAVIOLET BASED ADVANCED OXIDATION MODELING PROCESSES: OXIDATION AND DISINFECTION FOR DRINKING WATER TREATMENT. ScholarBank@NUS Repository.
Abstract: Three Ultraviolet based Advanced Oxidation Processes (UV/AOPs) namely UV/H2O2 AOP, UV/S2O82- AOP and UV/H2O2+S2O82- AOP were investigated and compared in removing Bisphenol A (BPA) from drinking water. Computational Fluid Dynamics (CFD) tool was used to study the UV/AOPs. The UV reactor was validated with MS2 microorganisms. The CFD/UV model underestimated the disinfection performance at higher flow rate. Reducing the inlet diameter or installing the 360 degree spiral baffle increased the MS2 log removal from 4.329 to 4.600 at 400 LPH. All UV/AOP systems produced formaldehyde as an intermediate product of BPA due to the inadequate reaction time. The CFD/UV//AOP models showed that the BPA removal followed UV/H2O2+S2O82- > UV/S2O82- > UV/H2O2 due to the competing reaction of OH and SO4 radicals in the combined UV/peroxide+persulfate system. The results demonstrated that UV/H2O2+S2O82- system was a highly promising advanced oxidation process for disinfection and degradation of the emerging contaminant BPA.
URI: http://scholarbank.nus.edu.sg/handle/10635/119630
Appears in Collections:Ph.D Theses (Open)

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