Ozone-Based Processes

Abstract Ozone is one of the most powerful oxidants that have been widely used in water and wastewater treatment. Here, the applications of ozone-based advanced oxidation processes (AOPs) in municipal and industrial wastewater treatment are described. The basics of ozone reactions in water and wastewater are first introduced, including ozone and hydroxyl radical reaction pathways, types of AOPs, and byproduct formation. Subsequently, a historical background of ozone wastewater treatment, as well as recent research works on different wastewater treatment using various ozone-based AOPs, such as ozone/hydrogen peroxide, ozone/UV, ozone/ultrasound, and ozone/titanium dioxide photocatalysis, are reviewed. A brief history of ozone wastewater treatment in the United States, followed by the current and planned ozone-based advanced wastewater treatment projects, are also provided in this chapter.