Evaluation of Four Dissolved Ozone Residual Meters' Performance and Disinfection Credits in Potable Reuse Applications

Measurement of dissolved ozone (O 3 ) residual is critical for accurately determining O 3 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, requirin...

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Bibliographic Details
Published in:Ozone: science & engineering 2020-05, Vol.42 (3), p.213-229
Main Authors: Chen, Elise C., Pisarenko, Aleksey N., Kolakovsky, Aviv, Howe, Elaine W., Trussell, R. Shane, Trussell, R. Rhodes
Format: Article
Language:English
Subjects:
Calibration
Disinfection
Emission measurements
Environmental monitoring
Indigo
Maintenance
Measuring instruments
Metal concentrations
Metals
On-line Ozone Meter
Ozone
Ozone Analysis
Performance evaluation
Wastewater
Water reuse
Water Reuse
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Summary:Measurement of dissolved ozone (O 3 ) residual is critical for accurately determining O 3 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 O 3 residual. Ease of maintenance and reliability of O 3 residual measurements were key parameters in ranking the meters for monitoring ozone CT in a water reuse application.
ISSN:0191-9512
1547-6545
DOI:10.1080/01919512.2020.1712187