A Dynamic, Mechanistic Model of the Ozone/Peroxide Process for Destruction of Micropollutants in Water
Public Deposited- Last Modified
- February 28, 2019
- Creator
-
Iwamasa, Kathryn J.
- Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
- Abstract
- The development of a dynamic, mechanistic model of the ozone/peroxide destruction of a micropollutant is discussed. A mathematical model consisting of a set of partial differential and algebraic equations to describe the change in concentration in a bubble contactor for each species is presented, and numerical methods to solve this system of equations are discussed briefly. Sensitivity of the model to input parameters is investigated; particularly, the reaction rate constant between the micropollutant and the hydroxyl radical, mass transfer coefficient, liquid dispersion coefficient, gas dispersion coefficient, in fluent pH, total carbonate species concentration, and reactor configuration. Transient results show the system approaches steady state within three bed-volumes under the specified conditions. Model predictions indicate that in the presence of carbonate species, the rate constant between the micropollutant and the hydroxyl radical is of particular importance for micropollutant removal. Species having rate constants greater than 10(superscript)9M(superscript)-1s(superscript)-1 compete well with the carbonate/hydroxyl radical reactions. Results demonstrate the efficiency of micropollutant removal in low dispersion reactors. Gas phase dispersion and reactor configuration are shown to have relatively little effect on predicted micropollutant removal. Model predictions compare well to data from an existing ozone/peroxide plant.
- Date of publication
- January 1995
- DOI
- Resource type
- Rights statement
- In Copyright
- Advisor
- Aitken, Michael
- Glaze, William
- Miller, Cass T.
- Degree
- Master of Science in Environmental Engineering
- Academic concentration
- Water Resources Engineering
- Degree granting institution
- University of North Carolina at Chapel Hill
- Graduation year
- 1995
- Language
- Deposit record
- 043fb25a-cea5-4ac2-b0d3-5af4a220fe28
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