Evaluation of Four Dissolved Ozone Residual Meters' Performance and Disinfection Credits in Potable Reuse Applications. (3rd May 2020)

• Record Type: Journal Article
• Authors: Chen, Elise C.; Pisarenko, Aleksey N.; Kolakovsky, Aviv; Howe, Elaine W.; Trussell, R. Shane; Trussell, R. Rhodes
• Is Part Of: Ozone: science and engineering. Volume 42:Number 3(2020)
• Page Start: 213
• Page End: 229
• Publication Date: 2020-05-03
• Subjects: Ozone -- Ozone Analysis -- On-line Ozone Meter -- Wastewater -- Water Reuse; Ozone -- Periodicals; 665.89
• DOI: 10.1080/01919512.2020.1712187
• Languages: English
• ISSNs: 0191-9512

Abstract

ABSTRACT: Measurement of dissolved ozone (O3 ) residual is critical for accurately determining O3 concentration-contact time product (CT) in order to establish pathogen removal credit. Higher concentrations of metals and organics in wastewater present more challenging conditions for on-line meters, requiring more frequent calibration and maintenance. This study evaluated the performance, maintenance, and cost of four commercially available over a 1-year period. Individual meter readings were compared to daily grab samples analyzed with an indigo trisulfonate method to determine O3 residual. Ease of maintenance and reliability of O3 residual measurements were key parameters in ranking the meters for monitoring ozone CT in a water reuse application.