Production of high dissolved O2/O3with rotating wheel entraining gas method for environmental application

Abstract

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 <TEX>$O_2$</TEX> and <TEX>$O_3$</TEX> in water. It produced higher concentration and higher transfer rate of dissolved <TEX>$O_2$</TEX> and <TEX>$O_3$</TEX> than conventional bubble aeration method, especially almost 100% of gas transfer efficiency was achieved for <TEX>$O_3$</TEX> 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 <TEX>$(VUV)/UV+O_3/O_2$</TEX> 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.