Date of Award

Spring 2012

Project Type

Thesis

Program or Major

Civil Engineering

Degree Name

Master of Science

First Advisor

Robin Collins

Abstract

The current study has obtained removal data for the four major trihalomethanes (chloroform, bromodichloromethane, dibromochloromethane, and bromoform) in a bench-scale, batch diffused aeration reactor under system pressures of 0-, 25-, 50-, and 70-psig. The removal data for each pressure was compared, and it is clear that trihalomethane air-stripping removals decrease with increasing system pressure.

Trihalomethane removal data was also collected for a bench-scale, continuous-flow diffused aeration reactor at pressures of 25-psi and 50-psi. A similar decrease in removals was observed at higher pressures for the continuous-flow system.

A model was formulated that predicts Henry's Law Constant for each trihalomethane at various pressures commonly encountered in water distribution systems. This Henry's Law Constant was included in two existing models that predict removals of trihalomethanes for batch and continuous systems, and 95% of the predicted values were within 15% of the actual removal data, while the other 5% of the predicted values were within 24% of the actual data.

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