Organic Contaminant Abatement in Reclaimed Water by UV/H2O2 and a Combined Process Consisting of O3/H2O2 Followed by UV/H2O2: Prediction of Abatement Efficiency, Energy Consumption, and Byproduct Formation

Yunho Lee, Daniel Gerrity, Minju Lee, Sujanie Gamage, Aleksey Pisarenko, Rebecca A. Trenholm, Silvio Canonica, Shane A Snyder, Urs Von Gunten

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

UV/H2O2 processes can be applied to improve the quality of effluents from municipal wastewater treatment plants by attenuating trace organic contaminants (micropollutants). This study presents a kinetic model based on UV photolysis parameters, including UV absorption rate and quantum yield, and hydroxyl radical (·OH) oxidation parameters, including second-order rate constants for ·OH reactions and steady-state ·OH concentrations, that can be used to predict micropollutant abatement in wastewater. The UV/H2O2 kinetic model successfully predicted the abatement efficiencies of 16 target micropollutants in bench-scale UV and UV/H2O2 experiments in 10 secondary wastewater effluents. The model was then used to calculate the electric energies required to achieve specific levels of micropollutant abatement in several advanced wastewater treatment scenarios using various combinations of ozone, UV, and H2O2. UV/H2O2 is more energy-intensive than ozonation for abatement of most micropollutants. Nevertheless, UV/H2O2 is not limited by the formation of N-nitrosodimethylamine (NDMA) and bromate whereas ozonation may produce significant concentrations of these oxidation byproducts, as observed in some of the tested wastewater effluents. The combined process of O3/H2O2 followed by UV/H2O2, which may be warranted in some potable reuse applications, can achieve superior micropollutant abatement with reduced energy consumption compared to UV/H2O2 and reduced oxidation byproduct formation (i.e., NDMA and/or bromate) compared to conventional ozonation.

Original languageEnglish (US)
Pages (from-to)3809-3819
Number of pages11
JournalEnvironmental Science and Technology
Volume50
Issue number7
DOIs
StatePublished - Apr 19 2016

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Ozonization
Bromates
Byproducts
Dimethylnitrosamine
Effluents
Wastewater
Energy utilization
Impurities
Wastewater treatment
Oxidation
pollutant
Water
prediction
Kinetics
Ozone
Photolysis
Quantum yield
effluent
wastewater
oxidation

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Organic Contaminant Abatement in Reclaimed Water by UV/H2O2 and a Combined Process Consisting of O3/H2O2 Followed by UV/H2O2 : Prediction of Abatement Efficiency, Energy Consumption, and Byproduct Formation. / Lee, Yunho; Gerrity, Daniel; Lee, Minju; Gamage, Sujanie; Pisarenko, Aleksey; Trenholm, Rebecca A.; Canonica, Silvio; Snyder, Shane A; Von Gunten, Urs.

In: Environmental Science and Technology, Vol. 50, No. 7, 19.04.2016, p. 3809-3819.

Research output: Contribution to journalArticle

Lee, Yunho ; Gerrity, Daniel ; Lee, Minju ; Gamage, Sujanie ; Pisarenko, Aleksey ; Trenholm, Rebecca A. ; Canonica, Silvio ; Snyder, Shane A ; Von Gunten, Urs. / Organic Contaminant Abatement in Reclaimed Water by UV/H2O2 and a Combined Process Consisting of O3/H2O2 Followed by UV/H2O2 : Prediction of Abatement Efficiency, Energy Consumption, and Byproduct Formation. In: Environmental Science and Technology. 2016 ; Vol. 50, No. 7. pp. 3809-3819.
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