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

Sujanie Gamage, Daniel Gerrity, Aleksey N. Pisarenko, Eric C. Wert, Shane A. Snyder

Research output: Contribution to journalArticle

23 Scopus citations

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, ΔUV254, and ΔTF correlations for MS2 and B. subtilis were useful for predicting inactivation, while those of E. coli were characterized by greater variability. [Supplementary materials are available for this article. Go to the publisher's online edition of Ozone: Science & Engineering for the following free supplemental resources: additional figures and data tables.].

Original languageEnglish (US)
Pages (from-to)501-513
Number of pages13
JournalOzone: Science and Engineering
Volume35
Issue number6
DOIs
StatePublished - Nov 1 2013

Keywords

  • Absorbance
  • Advanced Oxidation
  • Bacteria
  • CT
  • Disinfection
  • Fluorescence
  • Ozone
  • Spore
  • Virus
  • Wastewater Treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry

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