Modeling a High-Efficiency Ozone Injection Contactor

Date of Award

Fall 1996

Document Type


Degree Name

Master of Science (MS)


Civil & Environmental Engineering


Environmental Engineering

Committee Director

Gary Schafran

Committee Member

A. Osman Akan

Committee Member

Mujde Erten-Unal

Call Number for Print

Special Collections LD4331.E553 G37


Significant research over the last several years has focused on applying modeling equations for estimating design parameters of ozone contactors. Much of this research has focused on fine bubble diffusers, which are the more widely used injection system for ozone contactors in the U.S. A recently developed design incorporates a new ozone injection system called a sidestream venturi injector (SVI) which is used with a cocurrent downflow column to achieve very high ozone mass transfer efficiencies. A pilot study conducted at the Harwood's Mill water treatment plant in Newport News, Virginia, from June to December 1993 demonstrated the high mass transfer efficiencies possible in sidestream venturi injection with downflow column (SVI-DT) contactors. This paper focuses on the application of models to predict the transfer and reaction of ozone in the SVI-DT contactor. Results from the pilot study were used to calibrate the models, to verify model predictions, and to test the suitability of the models for full scale design. The models are used specifically to predict hydrodynamic conditions, gas holdup, mass transfer coefficients, ozone mass transfer efficiencies, and ozone profiles.


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