Generation and Characteristics of CO₂-UFB Water Using a Pressure Dissolution and Stirring Mixer

Abstract

Ultrafine Bubble（UFB）water, a technology originating in Japan, is a functional water containing bubbles ＜ 1µm in diameter, that has been attracting attention in recent years. There are reports that UFB water made from CO₂ has a sterilizing effect. However, it is difficult to determine whether CO₂ exists as bubbles because CO₂ is easily soluble in water. In this study, I generated CO₂-UFB water using a pressure dissolution and stirring mixer, and I investigated total dissolved solid（TDS）,CO₂ concentration, pH, nano number density, titration volume by NaOH, and radicals. As a result, TDS, CO₂ concentration, and titration volume by NaOH were increased with greater agitation time when generating CO₂-UFB. Nano number density was increased when the surface area of the second element was reduced against the first element of the mixer. Additionally, the presence of methyl radicals was confirmed in CO₂-UFB water. Moreover, the presence of CO₂-UFB can be presumed by measuring CO₂ concentration and TDS.