TY - JOUR
T1 - Modeling Micro- And Nano-Bubble Stability and Treatment Mechanisms in Batch Reactors
AU - Klammler, Harald
AU - Mohamed, Mohamed M.A.
AU - Hatfield, Kirk
AU - Achar, Jerry
AU - Jung, Jinho
N1 - Funding Information:
This work was supported by funding from the United Arab Emirates University National Water Center (Grant No. 31R112).
Publisher Copyright:
© 2020 American Society of Civil Engineers.
PY - 2020/8/1
Y1 - 2020/8/1
N2 - Micro and nano bubbles have increased water treatment efficiency in laboratory and field experiments due to the elevated pressure inside small bubbles and their large specific surface area, which enhance mass transfer into surrounding water. Existing theoretical studies are limited to size dynamics and stability of (mostly) single bubbles or transport of stable bubbles through porous media. We present a theoretical modeling approach combining bubble generation, stability, and treatment reaction mechanisms in batch reactors. We consider bubble dynamics as quasi-steady compared to other reaction time-scales involved. For a single treatment gas, we demonstrate two regimes (stable bubbles or not) in agreement with previous work. The critical transition point into the stable bubble regime is defined in terms of a minimum treatment substance concentration and minimum stable bubble radius. The results are discussed through hypothetical examples and further validated using existing ozone nanobubble batch experiment data for butylated hydroxytoluene (BHT) remediation.
AB - Micro and nano bubbles have increased water treatment efficiency in laboratory and field experiments due to the elevated pressure inside small bubbles and their large specific surface area, which enhance mass transfer into surrounding water. Existing theoretical studies are limited to size dynamics and stability of (mostly) single bubbles or transport of stable bubbles through porous media. We present a theoretical modeling approach combining bubble generation, stability, and treatment reaction mechanisms in batch reactors. We consider bubble dynamics as quasi-steady compared to other reaction time-scales involved. For a single treatment gas, we demonstrate two regimes (stable bubbles or not) in agreement with previous work. The critical transition point into the stable bubble regime is defined in terms of a minimum treatment substance concentration and minimum stable bubble radius. The results are discussed through hypothetical examples and further validated using existing ozone nanobubble batch experiment data for butylated hydroxytoluene (BHT) remediation.
KW - Bubble dynamics
KW - Butylated hydroxytoluene
KW - Chemical reaction
KW - Ozone
KW - Stability regime
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U2 - 10.1061/(ASCE)EE.1943-7870.0001736
DO - 10.1061/(ASCE)EE.1943-7870.0001736
M3 - Article
AN - SCOPUS:85086315383
SN - 0733-9372
VL - 146
JO - Journal of Environmental Engineering, ASCE
JF - Journal of Environmental Engineering, ASCE
IS - 8
M1 - 04020079
ER -