The Impact of Natural Variation of OH Radical Demand of Drinking Water Sources on the Optimum Operation of the UV/H2O2 Process

Hydroxyl radical (•OH) water demand is a key parameter which impacts the design and operation of UV/H2O2 process for water treatment. Long-term monitoring of the •OH water demand in water sources used for drinking water production indicated significant seasonal variations of this parameter (1.59 × 1...

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Bibliographic Details
Published in:Environmental science & technology 2019-03, Vol.53 (6), p.3177-3186
Main Authors: Kwon, Minhwan, Kim, Seonbaek, Jung, Youmi, Hwang, Tae-Mun, Stefan, Mihaela I, Kang, Joon-Wun
Format: Article
Language:English
Subjects:
Algae
Contaminants
Demand
Design parameters
Drinking water
Environmental monitoring
Experimental methods
Hydrogen peroxide
Hydroxyl radicals
Operating costs
Pollutant removal
Pollution monitoring
Seasonal variations
Water demand
Water treatment
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Summary:Hydroxyl radical (•OH) water demand is a key parameter which impacts the design and operation of UV/H2O2 process for water treatment. Long-term monitoring of the •OH water demand in water sources used for drinking water production indicated significant seasonal variations of this parameter (1.59 × 104 to 4.98 × 104 s–1), which coincided with the occurrence of algal blooming events. Pilot-scale tests at a drinking water treatment plant confirmed that the UV/H2O2 process performance for contaminant removal is predictable when the •OH water demand is accurately determined through a validated experimental method. A predictive tool was developed to identify the optimum operating conditions of the UV system with the UV/H2O2 process and it was used to demonstrate the significant impact of seasonal variations of •OH water demand on the operating costs.
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.8b05686