| Summary: | 碩士 === 國立交通大學 === 環境工程與科學系 === 84 === Recently, chlorinated hydrocarbon has been widely used in the industrial sectors. The improper use or treatment of chemicals may pollute the groundwater and soil. Lots of pollutants are known or suspected carcinogens. Chlorinated organic contaminants may return to living circle of human beings through groundwater flow and adverse health of human or creatures. Biotransformation is one of feasible alternatives to remedy this kind of pollution. By providing the primary substrate and controlling the groundwater environment, microbes may transform or reduce the concentration of pollutants.
The purpose of this paper is to develop a numerical model which is capable of simulating the biotransformation of chlorinated hydrocarbons in the groundwater. The developed models obtained in this study may provide a useful and powerful tool in designing and/or selecting the in-situ bioremediation strategies for the groundwater contaminants caused by chlorinated hydrocarbons.
In this paper, the Monod and Michaelis-Menten kinetics have been used to describe the kinetics of biotransformation, and thus, the biotransformation model has been developed. Using the published microbe coefficients and experiment data, the simulation results when using the one-dimensional transformation model have been compared with the experiment data. Besides, a three-dimensional biotransformation model is applied to a real contaminated site. The results show that after 700 days of biotransformation. The concentrations of the chlorinated hydrocarbons will lower than I ppb and reach the clearup goal.
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