Chapter 12: Ozonation Nanobubble Technology Check Access

This chapter introduces the fundamental principles of ozone nanobubble generation and current applications, as well as the limitations in practical applications. Nanobubbles (NBs) are an emerging research area that shows great potential for enhancing the mass transfer and reaction efficiency of many chemical processes including ozonation. NBs are ultrafine or small bubbles with a size or diameter typically smaller than 1 μm, which exhibit valuable characteristics (e.g. long residence times in water due to their low buoyancy and high stability against coalesces, collapse or burst). Particularly, NBs have a higher efficiency of mass transfer compared to bulk bubbles due to the high specific surface areas. Ozone NBs, a new form of dispersion in water, could potentially increase the longevity and stability of ozone as well as the effective dissolved ozone concentration compared to regular dissolved ozone. Ozone NBs generation and emerging applications are discussed to shed new light on the development of ozonation disinfection. Finally, future directions and research needs for commercialization are highlighted and summarized.