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Dissertation
Removal of organic pollutants by ozonation: kinetics and reactor design
Doctor of Philosophy (Ph.D.), Drexel University
1988
DOI:
https://doi.org/10.17918/00008365
Abstract
The research presented in this dissertation is focused on the use of ozone for the elimination of man-made organic micropollutants from drinking waters and waste effluents requiring advanced treatment. The primary objective of the research was to develop a mathematical model which can simulate the physical transport and chemical oxidation phenomena prevailing during the process of ozonation. The process model is comprised of a set of concentration profiles defined in liquid and gas phases. The profile equations for ozone and the targeted trace organic compound are based on differential mass balances, and adhere to the principles of continuity. The model is analyzed for its special cases and for its sensitivity to various process parameters. A systematic methodology is developed for the estimation of the necessary model parameters. A set of laboratory experiments is carried out to test the validity of the developed process model. According to the mathematical model developed in this study, the efficiency of the process depends on several kinetic and operational factors. In particular, the reactivity and volatility of the targeted pollutants may have a strong effect on process performance. The chemical quality of the raw water, mass-transfer and hydrodynamic characteristics of the reactor, and various operational variables, such as the influent ozone concentration in the feed gas, water loading rate, and gas-to-liquid ratio, are among other factors controlling the removal of trace organic pollutants. Two process parameters are identified to describe the kinetics of ozone-induced oxidation reactions: (i) the specific ozone utilization rate, w (hr-1), of the raw water to be treated, and (ii) the total oxidation constant, kT (M-1.s-1), of the organic compounds to be removed from the water. As an integral part of the research, bench-scale, as well as predictive, techniques are proposed for the evaluation of the w and kT constants in raw waters contaminated with various synthetic organic micropollutants. Combined with the developed parameter estimation methodology, the process model constitutes a particularly powerful engineering tool. In addition to efficiency comparisons under different operational conditions and reactor configurations, the model can also be used to make performance and cost comparisons between ozonation and other alternative technologies.
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Details
- Title
- Removal of organic pollutants by ozonation
- Creators
- Coskun Yurteri
- Contributors
- Mirat D. Gurol (Advisor) - Drexel University, Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xv, 144 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- Drexel University
- Other Identifier
- 991021888822304721