Vol. 12, No.2, pp.55-58 (2019)
Sterilization Effects of Ozone Fine (Micro/Nano) Bubble Water
S. Saijai1, V. Thonglek2, and K. Yoshikawa2
1Faculty of Science and Agricultural Technology, Rajamangala University of Technology Lanna, Chiang Mai, Thailand
2Faculty of Engineering, Rajamangala University of Technology Lanna, Chiang Mai, Thailand
Abstract
Effects of sterilization of fine (micro/nano) bubble (FB) water of ozone gas were studied in relating to treatment times. In the applications of FB water, since hydroxyl radicals (OH•) were observed to occur in the water, it is expected that ozone FB water can have strong and long-duration sterilization effects, which is a very important function, in particular, for food safety applications. In order to verify the effects, more comprehensive experiments were made to clarify for FB water of ozone gas. The results showed that fresh ozone fine bubbles (O3FB) water had the most effective inhibition of the growth of Escherichia coli when used right after 60 min generation. In the three days-storage O3FB water, no sterilization effect was observed. The results of this study suggest that the application of fresh O3FB water may be useful for sterilization process in the food industry.
Keywords - Fine bubble, ozone, sterilization