Water Supply, Construction Systems for Water
DOI: http://www.dx.doi.org/10.24866/2227-6858/2020-2-12

Alan-Reise N., Eskin A., Zhilyakova T., Unru P.

NIKITA ALAN-REIS, Student, e-mail: alanreys@mail.ru
ANTON ESKIN, Senior Lecturer, ScopusID 56609965900, e-mail: eskin.aa@dvfu.ru
TATYANA ZHILYAKOVA, Student, e-mail: tanyzh98@mail.ru
Department of Engineering Systems of Buildings and Structures
PETR UNRU, Senior Lecturer, Department of Electronics and Communications, ScopusID: 57192802961, e-mail: unrupp@gmail.ru
School of Engineering, Far Eastern Federal University
Vladivostok, Russia 

Effect of ultrasonic radiation on the air bubbles ascent time

Abstract: The paper presents the results of an experimental study of the effect of ultrasonic radiation generated by a piezoelectric ceramic disk on the ascent time of microbubbles released from an aqueous solution saturated with air. It was shown that being irradiated by ultrasound, the bubbles combine into complexes, which increases the rate of their ascent. Dependency of the ascent time on the frequency of ultrasonic radiation is of a complex nature; however, the use of ultrasound with a frequency of 160 kHz can reduce the ascent time from 39.9 to 13.5 s. The results can be used to increase the productivity of wastewater treatment plants by pressure flotation.
Keywords: microbubbles, ascent rate, ultrasonic radiation, acoustic cavitation, gas emulsion, pressure flotation.

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