Ozone dosage is the amount of ozone applied to the water. Ozone dosage is an important factor in water treatment. By controlling the amount of ozone applied to the water, treatment plant operators can optimize its effectiveness.

On the other hand, dissolved ozone is the amount of ozone measured in the water.

In no way does adding ozone to water equal dissolved ozone in the water.

The dissolved ozone levels in water will be impacted by the quality of the water, as well as the temperature and effectiveness of your mechanical mixing equipment used to transform ozone into water.

To ensure a particular, targeted dissolved ozone level, the oxidizable compounds in the water must be exceeded as well as any other ozone scavenging conditions. Keep in mind that depending on how long it takes to achieve your desired dissolved ozone level, the half-life of ozone may play a role.

The amount of ozone you aim to put into the water will always be greater than the amount that is actually absorbed by the solution.

Because of its low solubility rate in water and due to system inefficiencies, part of the ozone off-gasses without being absorbed. This off-gassed ozone must then be vented outside or destroyed with an ozonation device.

Understanding Different Levels of Dissolved Ozone in Water

The mass transfer rate, often called the ratio of ozone gas dosage to end dissolved level, is a measurement of how rapidly chemicals are transported throughout a substance. The amount of dissolved ozone gas divided by the quantity of ozone gas given is referred to as percentage. A percentage is the most common way to express this. For example, a 90% mass transfer rate of ozone would indicate that 90 percent of the total amount of ozone dose, 1ppm for example, will be present in water after one ppm of ozonation (90%).

Because of various efficiencies and water mass transfer, various types of ozone injection will generate different levels of dissolved ozone in the water. A few examples are shown in the pictures below:

Dissolved Ozone Using Bubble Diffuser

Ozone dissolved with a bubble diffuser is straightforward and cost-effective.

However, in most cases, it has the lowest mass transfer efficiency of all techniques utilized, resulting in the greatest difference between ozonized water dosage and measured dissolved ozonide.

Ozone Dissolved Using Venturi

A pump and venturi injector’s liquid-ozone combination is simple to create and extremely efficient. Because of the strong mixing action of a venturi, this will combine water in the tank more effectively than a standard bubble diffuser, resulting in a greater mass transfer of ozone into water.

You can also read our blog post on using venturi injector vs. bubble diffuser.