How to Dissolve Ozone in Water Using a Static Mixer

When using a static mixer, the water should be pressurized to aid in the dissolution of the ozone gas into the water. Therefore, the ozone gas must enter the flow of water under pressure. We have found that a water pressure of around 30 PSI is ideal for mass transfer, but higher or lower pressures can also be used.

Benefits:

Simple and effective system design with no moving parts
Ideal for pressurized water
More energy-efficient than a venturi tube as there is no need for a pressure differential across the mixer
Easier to contain ozone gas and maintain a safe environment due to ozone emissions
Can handle water that may clog or block a venturi injector

Drawbacks:

Higher risk of water backflow into the ozone generator due to pressurized water
Requires flowing pressurized water
Ozone gas partially dissolves into liquid. However, with the proper method and equipment, high mass transfer efficiency can be achieved through any method of dissolving ozone into water. Review the following tips to help design a suitable system for your ozone application using a static mixer.

Basic principles of ozone solubility:

Lower temperatures increase the solubility of ozone gas in liquid; higher pressures increase the solubility of ozone gas in liquid; higher concentrations of ozone gas increase the solubility of ozone gas in liquid.

Tips for static mixer installation:

Install the static mixer after the point of ozone injection, if possible within a 30cm range. Typically, ozone bubbles shear when entering the water but recombine into an air pocket at the top of the pipe. If there is water flowing into the tank, install the static mixer within a 30cm range from the tank.

If water is being injected into an unpressurized container, consider using an orifice to create backpressure on the static mixer to improve solubility. Ensure proper water flow rate to achieve optimal water velocity for the mixer in use.