Modeling of organic pollutant destruction in a stirred-tank reactor by ozonation

Article type: Research Article

Authors: Cheng, Jiang | Yang, Zhuo-ru | Chen, Huan-qin | Kuo, C. H. | Zappi, E. M.

Affiliations: College of Chemical Engineering, South China University of Technology, Guangzhou 510641, China | Swalm School of Chemical Engineering, Mississippi State University, MS 39762, Starkville,USA

Abstract: Destruction of organic contaminants in water by ozonation is a gas-liquid process which involves ozone mass transfer and fast irreversible chemical reactions. Ozonation reactor design and process optimizing require the modeling of the gas-liquid interactions within the reactor. In this paper a theoretical model combining the fluid dynamic and reaction kineticparameters is proposed for predicting the destruction rates of organic pollutants in a semi-batch stirred-tank reactor by ozonation. A simple expression for the enhancement factor as ourprevious work (Cheng, 2000) has been applied to evaluate the chemical mass transfer coefficient in ozone absorption.2,4-dichlorophenol (2,4-DCP) and 2,6-DCP or their mixture are chosen as the model compounds for simulating, and the predicted DCP oundation item: The National Natural Science Foundation of China (No. 20006006) ncentrations are compared with some measured data.

Keywords: dichlorophenol destruction, enhancement factor, stirred-tank reactor, ozonation

Journal: Journal of Environmental Sciences, vol. 13, no. 4, pp. 449-452, 2001