Performance of a new micro-bubble generator with a spherical body in a flowing water tube

Characteristics of microbubbles generated by porous mullite ceramics prepared by an extrusion method using organic fibers as the pore former

“…Small bubbles have recently been called microbubbles (m to sub mm in size) and nanobubbles (smaller than m in size). Many bubble generation methods have therefore been investigated to obtain bubbles less than mm in size; these include the usage of fine nozzles, orifices and/or pores, [11][12][13] pressurizing dissolution methods, 14 multiphase flowing methods, 15,16 use of a special powerful shear rotating pump, 17 etc. In all cases, bubble generation requires highly pressurized gas (>400 kPa), powerful pumps and/or special pumps.…”

Degradation of methyl orange using short-wavelength UV irradiation with oxygen microbubbles

“…The results shows that the decolorization rate of methyl orange increases with an increase of flow rate of oxygen microbubbles. It was reported that microbubbles have unique characteristics compared with large bubbles: a very large gas/liquid interfacial area; high gas-dissolution rate; and bubble-stability [32][33][34]. Furthermore, Khinast et al [35] suggested recently that microbubbles caused hydrodynamic effects in the Figs.…”

Size distribution and Sauter mean diameter of micro bubbles for a Venturi type bubble generator

“…At the same time, since it required the greatest amount of power to run, the author suggested that the power consumption and performance should be considered together when evaluating the applicability of a given bubble generator for the desired industrial process. Sadatomi et al (2005) invented a new bubble generator with a spherical body in a flowing liquid tube and tested its performance. The optimum ratio of the spherical body diameter to the tube diameter was found as well as the optimum axial position of the air suction holes.…”