What is the best method to dissolve ozone in water?

ozone drinking water

What is the best method to dissolve ozone in water? A contact tank or direct injection system?

The dissolving of ozone into water commonly employs two methods: the venturi injector and the bubble diffusion method. Each method possesses its unique advantages, disadvantages, and optimal applications.

In the early stages of ozone applications, large basins or tanks, coupled with bubble diffusers, served as the primary means to dissolve ozone into water. Ceramic diffusers were easily accessible, and the use of tanks or basins provided a straightforward and effective approach. As ozone applications gained popularity, additional techniques for dissolving ozone into water were explored. A pivotal development occurred in 1983 when the Mazzei Injector company began manufacturing specialized ozone-compatible venturi injectors. This innovation propelled the venturi injector into the mainstream ozone market, accommodating water flows of all sizes and diverse applications.

While venturi injectors offer advantages such as improved mass transfer efficiencies and a smaller footprint, the simple bubble diffuser remains relevant in contemporary applications. This highlights the coexistence of both methods in the evolving landscape of ozone dissolution.

dissolve ozone Water Contact Tank
dissolve ozone Water Injection skid

Bubble Diffuser Advantages:

  • Low cost
  • No moving parts
  • Easy to setup
  • Low energy – does not require water or elevated water pressures
  • Simple, reliable operation long-term

Venturi Injector Advantages:

  • Extremely efficient ozone transfer
  • A great option for pressurized water
  • More ozone dissolved into water = less ozone off-gassing = safer environment
  • Easier to contain ozone gas and maintain a safe environment due to off-gassing
  • Smaller tanks and an overall footprint of the system can be achieved

Bubble Diffuser Disadvantages:

  • The ideal tank/basin depth for effective ozone transfer is 18-24 feet deep
  • Ideal tank depths are not realistic in most applications causing this to be a less efficient transfer method.
  • Diffusers can become plugged and may require periodic replacement
  • Difficult to use

Source: Oxidationtech Venturi vs Bubbling

Venturi Injector Disadvantages:

  • Typically requires more energy than other options due to the required pressure differential across venturi injector
  • Requires flowing, pressurized water
  • Greater risk of water backing up into the ozone generator as the water is pressurized
  • Venturi can plug or become obstructed in contaminated water

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