TY - JOUR
T1 - Ultrasonic cleaning in the membrane process
T2 - From phenomenon to mechanism and mathematical model
AU - Hu, Ge
AU - Wang, Zhan
AU - Wang, Xi
N1 - Publisher Copyright:
© 2023
PY - 2023/12/5
Y1 - 2023/12/5
N2 - An inhibition effect of cavitation bubbles on cake removal was observed for the first time in the ultrasonic cleaning process. Then, a mathematical model simultaneously considering inhibition effect, bubble dynamics, and actual nonuniform cake structure was established based on force analysis. The result showed that model could precisely predict the flux recovery rate (FRR) (R2 > 0.97). Furthermore, the model was used to determine the theoretical cleaning efficiencies (FRR*) under different conditions: FRR* increased with power whereas decreased with frequency, the highest value was 91.26%(1.0 W/cm2&20 kHz). Besides, a comparison between FRR* and FRR indicated that a duration of 120 s was enough in ultrasonic cleaning. Critical duration determined by the half-life period method successfully evaluated the significant jump in FRR. Additionally, different foulants and multi-cycle experiments were carried out to validate the application of the model and energy conservation (60–70%) of periodical ultrasonic cleaning. This study provided significant insights into industrial ultrasonic cleaning process.
AB - An inhibition effect of cavitation bubbles on cake removal was observed for the first time in the ultrasonic cleaning process. Then, a mathematical model simultaneously considering inhibition effect, bubble dynamics, and actual nonuniform cake structure was established based on force analysis. The result showed that model could precisely predict the flux recovery rate (FRR) (R2 > 0.97). Furthermore, the model was used to determine the theoretical cleaning efficiencies (FRR*) under different conditions: FRR* increased with power whereas decreased with frequency, the highest value was 91.26%(1.0 W/cm2&20 kHz). Besides, a comparison between FRR* and FRR indicated that a duration of 120 s was enough in ultrasonic cleaning. Critical duration determined by the half-life period method successfully evaluated the significant jump in FRR. Additionally, different foulants and multi-cycle experiments were carried out to validate the application of the model and energy conservation (60–70%) of periodical ultrasonic cleaning. This study provided significant insights into industrial ultrasonic cleaning process.
KW - Mathematical model
KW - Membrane cleaning
KW - Nonuniform cake structure
KW - Theoretical cleaning efficiency
KW - Ultrasonication
UR - http://www.scopus.com/inward/record.url?scp=85171989265&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2023.119267
DO - 10.1016/j.ces.2023.119267
M3 - Article
AN - SCOPUS:85171989265
SN - 0009-2509
VL - 282
JO - Chemical Engineering Science
JF - Chemical Engineering Science
M1 - 119267
ER -
