Abstract
The kinetics of Escherichia coli inactivation with ozone were investigated with semi-batch and continuous-flow tubular reactors in solutions buffered with phosphate at pH 6 and 8, temperatures ranging from 5 to 25°C, and in the presence (0.01 m) and absence of radical scavenger tert-butanol. Ozone concentrations and contact times investigated ranged from 6 to 41 μg/l, and 1.8–33 s, respectively. Inactivation kinetics were found to be first-order with respect to both ozone concentration and active microorganism density. The overall second-order rate constant was 1301/(mg s) at 20°C, and the corresponding activation energy was 37,100 J/mol. Experimental results corresponding to tests performed at pH 6 and 8, and in the presence (0.01 m) and absence of radical scavenger tert-butanol, confirmed that dissolved molecular ozone was primarily responsible for E. coli inactivation in the range of experimental conditions investigated.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
