Fundamental Study on Disinfection Effect of Microbubbles

Inactivation of Lactobacillus fructivorans in physiological saline and unpasteurised sake using CO2 microbubbles at ambient temperature and low pressure

“…Furthermore, not only dissolved CO 2 but also the characteristic action of MBs, such as shock waves generated by the collapse of MBs (Li et al. , 2009; Tsuge et al. , 2009), cavitation and shear force might contribute supplementarily to the inactivation of L. fructivorans by MB‐CO 2 treatment.…”

“…This is believed to occur because of increased diffusibility of CO 2 and fluidity of the cell membrane at higher temperatures (Haas et al, 1989). Furthermore, not only dissolved CO 2 but also the characteristic action of MBs, such as shock waves generated by the collapse of MBs Tsuge et al, 2009), cavitation and shear force might contribute supplementarily to the inactivation of L. fructivorans by MB-CO 2 treatment. It was also considered that the contacts between CO 2 and the membrane of microorganisms might be accelerated by MB-CO 2 .…”

“…MBs, very fine bubbles with diameters less than 50 lm, have been studied extensively in many fields. MBs can be generated by the pressurising dissolution and shear methods and are associated with characteristic actions such as high solubility, shear force, cavitation, shock waves and hydroxyl radicals that arise because of their collapse (Takahashi, 2004;Li & Tsuge, 2006;Matsuo et al, 2006;Xu & Shiina, 2007;Li et al, 2009;Tsuge et al, 2009). Therefore, the aim of this study was to investigate the effects of MB-CO 2 treatment on the inactivation of L. fructivorans suspended in physiological saline and unpasteurised sake at ambient temperature and a pressure lower than 2.0 MPa.…”

What can be done with microbubbles generated by a fluidic oscillator? (survey)

“…It is demonstrated in [17] to be easily and environment friendly removable by microbubbles. In fact, microbubbles were demonstrated by Tsuge et al, [18] even to perform disinfection by removal of pathogens. The mechanism presented in Fig.…”

Flow Properties of Ultra-Fine Bubble Mixtures Passing through Micro-Apertures

“…Yamada et al [17] discussed the relationship between bubble size populations and their effects on oxygen supply. Tsuge et al [18] investigated the bactericidal effect of ozone FBs on Bacillus subtilis by changing parameters such as the outlet pressure of the pump, elapsed time, concentration of fed and dissolved ozone, and FB formation method. Ohnari et al [19] investigated the water purification and recovery of oyster cultures in a bay by using FBs.…”