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

Haitao Li , Bo Xie , Mizhou Hui

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 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.

Key Words

rotating whee; entraining gas; dissolved ozone; dissolved oxygen; air purification; water treatment

Address

Haitao Li, Bo Xie, Mizhou Hui — National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

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