Evaluation of Process Control Alternatives for the Inactivation of Escherichia coli, MS2 Bacteriophage, and Bacillus subtilis Spores during Wastewater Ozonation

Authors

Sujanie Gamage, Southern Nevada Water AuthorityFollow
Daniel Gerrity, University of Nevada, Las VegasFollow
Aleksey N. Pisarenko, Southern Nevada Water AuthorityFollow
Shane A. Snyder, Southern Nevada Water AuthorityFollow

Document Type

Article

Publication Date

2013

Publication Title

Ozone: Science & Engineering: The Journal of the International Ozone Association

Volume

35

Issue

6

First page number:

501

Last page number:

513

Abstract

Dissolved ozone concentration integrated over time (CT) is a reliable indicator of disinfection efficacy in drinking water treatment. However, ozone CT may not be measurable in some wastewater ozone applications. In this study, alternative process control parameters, specifically ozone to total organic carbon (O₃:TOC) ratio, differential UV₂₅₄ absorbance (ΔUV₂₅₄), and differential total fluorescence (ΔTF), were correlated with the inactivation of Escherichia coli, the bacteriophage MS2, and Bacillus subtilis spores in five secondary wastewater effluents. CT values greater than 9 mg-min/L were generally required for measurable inactivation of B. subtilis spores, and CT values of 1 and 2 mg-min/L consistently achieved greater than 6- and 5-log inactivation of MS2 and E. coli, respectively. The O₃:TOC, ΔUV_254, and ΔTF correlations for MS2 and B. subtilis were useful for predicting inactivation, while those of E. coli were characterized by greater variability.

Keywords

Absorbance; Advanced oxidation; Bacteria; CT; Disinfection; Drinking water; Drinking water—Purification; Escherichia coli; Fluorescence; Land treatment of wastewater; Ozone; Sewage; Sewage —Purification; Spores; Viruses; Wastewater treatment

Disciplines

Civil and Environmental Engineering | Environmental Engineering | Environmental Sciences | Water Resource Management

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Repository Citation

Gamage, S., Gerrity, D., Pisarenko, A. N., Snyder, S. A. (2013). Evaluation of Process Control Alternatives for the Inactivation of Escherichia coli, MS2 Bacteriophage, and Bacillus subtilis Spores during Wastewater Ozonation. Ozone: Science & Engineering: The Journal of the International Ozone Association, 35(6), 501-513.
http://dx.doi.org/10.1080/01919512.2013.833853