Advances in environmental research

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

  • Li, Haitao (National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences) ;
  • Xie, Bo (National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences) ;
  • Hui, Mizhou (National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences)
  • Received : 2012.08.20
  • Accepted : 2012.12.26
  • Published : 2013.03.25
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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 $O_2$ and $O_3$ in water. It produced higher concentration and higher transfer rate of dissolved $O_2$ and $O_3$ than conventional bubble aeration method, especially almost 100% of gas transfer efficiency was achieved for $O_3$ 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 $(VUV)/UV+O_3/O_2$ 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.

Keywords

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