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Intensified ozonation in packed bubble columns for water treatment : focus on mass transfer and humic acids removal

Xuetong Yang (UGent) , Ze Liu, Dave Manhaeghe (UGent) , Yongyuan Yang (UGent) , Joël Hogie (UGent) , Kristof Demeestere (UGent) and Stijn Van Hulle (UGent)
(2021) CHEMOSPHERE. 283.
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Abstract
Ozonation has been widely applied for the oxidation of contaminants in wastewater, and the disinfection of water. However, low ozone (O-3) mass transfer efficiency in common ozonation reactors requires high O-3 doses and causes high energy consumption. In this study, to intensify the O-3 mass transfer and oxidation of humic acids (HA) solution, a lava rock packed bubble column (LBC) and a metal pall ring packed bubble column (MBC) were developed and evaluated. In comparison with non-packed bubble column (BC), both LBC and MBC enhanced the O-3 mass transfer efficiency and the generation of hydroxyl radicals, thereby increasing the HA removal from an aqueous solution. At applied O-3 dose of 33.3 mg/(L-column h), the HA removal efficiency in BC was only 47%. When MBC and LBC were applied, it increased to 66% and 72%, respectively. Meanwhile, the O-3 utilization efficiency in LBC reached 68%, which was higher than that in MBC (50%) and BC (21%). Consequently, LBC has the lowest energy consumption (E-EO) for HA removal (1.4 kWh/m(3)), followed by MBC (1.6 kWh/m(3)) and BC (2.9 kWh/m(3)). LBC had better performance than MBC due to the adsorptive and catalytic roles of lava rock on the ozonation process. This study demonstrates the advantages of using lava rocks as packed materials in O-3 bubble column over metal pall rings in intensifying O-3 mass transfer and organic matters removal, which provides some insights into promoting the industrial application of O-3.
Keywords
O-3, Mass transfer, Lava rock, Packed bubble column, Humic acids, Energy consumption, ADVANCED OXIDATION PROCESSES, DISSOLVED ORGANIC-CARBON, REAL-TIME CONTROL, CATALYTIC OZONATION, ACTIVATED CARBON, SECONDARY EFFLUENT, ENHANCED OZONATION, AQUEOUS-SOLUTIONS, OZONE-WATER, DEGRADATION

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MLA
Yang, Xuetong, et al. “Intensified Ozonation in Packed Bubble Columns for Water Treatment : Focus on Mass Transfer and Humic Acids Removal.” CHEMOSPHERE, vol. 283, 2021, doi:10.1016/j.chemosphere.2021.131217.
APA
Yang, X., Liu, Z., Manhaeghe, D., Yang, Y., Hogie, J., Demeestere, K., & Van Hulle, S. (2021). Intensified ozonation in packed bubble columns for water treatment : focus on mass transfer and humic acids removal. CHEMOSPHERE, 283. https://doi.org/10.1016/j.chemosphere.2021.131217
Chicago author-date
Yang, Xuetong, Ze Liu, Dave Manhaeghe, Yongyuan Yang, Joël Hogie, Kristof Demeestere, and Stijn Van Hulle. 2021. “Intensified Ozonation in Packed Bubble Columns for Water Treatment : Focus on Mass Transfer and Humic Acids Removal.” CHEMOSPHERE 283. https://doi.org/10.1016/j.chemosphere.2021.131217.
Chicago author-date (all authors)
Yang, Xuetong, Ze Liu, Dave Manhaeghe, Yongyuan Yang, Joël Hogie, Kristof Demeestere, and Stijn Van Hulle. 2021. “Intensified Ozonation in Packed Bubble Columns for Water Treatment : Focus on Mass Transfer and Humic Acids Removal.” CHEMOSPHERE 283. doi:10.1016/j.chemosphere.2021.131217.
Vancouver
1.
Yang X, Liu Z, Manhaeghe D, Yang Y, Hogie J, Demeestere K, et al. Intensified ozonation in packed bubble columns for water treatment : focus on mass transfer and humic acids removal. CHEMOSPHERE. 2021;283.
IEEE
[1]
X. Yang et al., “Intensified ozonation in packed bubble columns for water treatment : focus on mass transfer and humic acids removal,” CHEMOSPHERE, vol. 283, 2021.
@article{8712342,
  abstract     = {{Ozonation has been widely applied for the oxidation of contaminants in wastewater, and the disinfection of water. However, low ozone (O-3) mass transfer efficiency in common ozonation reactors requires high O-3 doses and causes high energy consumption. In this study, to intensify the O-3 mass transfer and oxidation of humic acids (HA) solution, a lava rock packed bubble column (LBC) and a metal pall ring packed bubble column (MBC) were developed and evaluated. In comparison with non-packed bubble column (BC), both LBC and MBC enhanced the O-3 mass transfer efficiency and the generation of hydroxyl radicals, thereby increasing the HA removal from an aqueous solution. At applied O-3 dose of 33.3 mg/(L-column h), the HA removal efficiency in BC was only 47%. When MBC and LBC were applied, it increased to 66% and 72%, respectively. Meanwhile, the O-3 utilization efficiency in LBC reached 68%, which was higher than that in MBC (50%) and BC (21%). Consequently, LBC has the lowest energy consumption (E-EO) for HA removal (1.4 kWh/m(3)), followed by MBC (1.6 kWh/m(3)) and BC (2.9 kWh/m(3)). LBC had better performance than MBC due to the adsorptive and catalytic roles of lava rock on the ozonation process. This study demonstrates the advantages of using lava rocks as packed materials in O-3 bubble column over metal pall rings in intensifying O-3 mass transfer and organic matters removal, which provides some insights into promoting the industrial application of O-3.}},
  articleno    = {{131217}},
  author       = {{Yang, Xuetong and Liu, Ze and Manhaeghe, Dave and Yang, Yongyuan and Hogie, Joël and Demeestere, Kristof and Van Hulle, Stijn}},
  issn         = {{0045-6535}},
  journal      = {{CHEMOSPHERE}},
  keywords     = {{O-3,Mass transfer,Lava rock,Packed bubble column,Humic acids,Energy consumption,ADVANCED OXIDATION PROCESSES,DISSOLVED ORGANIC-CARBON,REAL-TIME CONTROL,CATALYTIC OZONATION,ACTIVATED CARBON,SECONDARY EFFLUENT,ENHANCED OZONATION,AQUEOUS-SOLUTIONS,OZONE-WATER,DEGRADATION}},
  language     = {{eng}},
  pages        = {{10}},
  title        = {{Intensified ozonation in packed bubble columns for water treatment : focus on mass transfer and humic acids removal}},
  url          = {{http://doi.org/10.1016/j.chemosphere.2021.131217}},
  volume       = {{283}},
  year         = {{2021}},
}

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