Production of high dissolved O2/O3 with rotating wheel entraining gas method for environmental application

There is a significant demand to make various dissolved gases in water. However, the conventional aeration method shows low gas mass transfer rate and gas utilization efficiency. In this study, a novel rotating wheel entraining gas method was developed for making high dissolved O₂ and O₃ in water. It produced higher concentration and higher transfer rate of dissolved O₂ and O₃ than conventional bubble aeration method, especially almost 100% of gas transfer efficiency was achieved for O₃ in enclosed reactor. For application of rotating wheel entraining gas method, aerobic bio-reactor and membrane bio-reactor (MBR) were successfully used for treatment of domestic and pharmaceutical wastewater, respectively; and vacuum ultraviolet (VUV)/UV+O₃/O₂ reactors were well used for sterilization in air/water, removal of dust particles and toxic gases in air, and degradation of pesticide residue and sterilization on fruits and vegetables.