Water and wastewater treatment using Nanobubble Technology and Ozone Spray

Water and wastewater treatment using Nanobubble Technology and Ozone Spray

Utilities are continuously seeking novel methods to remediate cyanobacteria blooms, which can deteriorate water quality and contaminate shorelines.

Details

These water quality concerns have led to creation of health risk guidelines in drinking water and recreational water supplies. In addition, shorelines have also been polluted with cyanobacteria cells that can create environmental concern to wildlife in addition to public concerns if nuisance metabolites become aerosolized.

Ozone (O3) is a strong oxidant that has long been utilized to meet multiple treatment objectives during water and wastewater treatment applications. Unlike other chemical disinfectants its primary byproduct is dissolved oxygen, which can provide a benefit to aquatic environments.  Ozone can also degrade cyanobacteria cells and oxidize metabolites (i.e. cyanotoxins, taste and odor compounds).  However, the ozone mass transfer process from gas to liquid phase can be a limiting step for environmental applications due to offgassing residual ozone.  Nanobubble technology provides an innovation that dramatically increases the efficiency of ozonation, having application in aquatic environments.  Furthermore, the development of innovative aqueous ozone spraying devices may allow for the technology to be used to treat shorelines when a toxic cyanobacteria bloom is identified.

The objectives of this project are:

  • To evaluate the efficacy of ozone nanobubbles and spray as an innovative, green-nanotechnology treatment for use in water and wastewater treatment.
  • To assess the ability of ozone technology to oxidize cells, cyanotoxins, and taste and odor compounds (i.e. MIB, geosmin), applying nanobubbles to understand process performance.
  • To explore the application of ozone nanobubble technology for treating NOMs and another micropollutant (to be determined).
  • To demonstrate and calculate efficiency gain over traditional ozone dissolving technologies. This may make ozone an attractive option over UV or chlorine, for example.

 

WaterRA Contact

Marlene Hsu

Dr Arash Zamyadi

Amount being sought

$40,000 total cash contribution sought for establishment of the pilot plant and testing program

Due Date

26th Nov, 2021