Recent Trends in Ozonation Technology: Theory and Application

The treatment of wastewater by ozonation is one of the growing and reliable technologies from the last few years. One of the critical considerable aspects in an ozonation system is the gas-liquid contacting system which is used in a variety of industrial applications and has been studied from many points of view. Therefore, considerations of mass transfer fundamentals are very crucial by considering the reaction dynamics. The mass transfer taking place in these systems is affected by a number of individual factors like volumetric mass transfer coefficient, Henry’s coefficient, and solubility of ozone, which play a critical role in effective performance of the ozonation process. In this work a comprehensive assessment has been illuminated on gas-liquid interfacial mass transfer, in particular ozone-water environment. An insight into the design parameters (gas holdup, bubble characteristics) affecting the mass transfer mechanism in a typical bubble column gas-liquid contactor is discussed along with a mathematical model on a single bubble for estimation of mass transfer efficiencies. The chapter ends with case studies on the application of ozonation in grey-water treatment.