Ozone in Water

Posted by Joel Leusink on April 1, 2010 under Commercial Ozone Usage, Food Industry | Be the First to Comment

Why dissolve ozone in water?

We are commonly asked about the uses of ozone. I want to help cover some of the basics of using ozone  in water.

Ozone gas is dissolved into water for various reasons, these are just a few of the common applications of ozonated water.  Click on any of the live links for more information.

• Bottled water
• Food Processing
• Surface sanitation
• Bacteria reduction
• Groundwater remediation
• Aquaculture/life support in aquariums
• Cooling towers
• Color removal
• Laundry
• Algae control in ponds
• Horticulture
• Swimming pools and spas
• Municipal water
• Iron & Manganese removal

How to dissolve ozone into water?

Ozone gas is dissolved into water just as many other molecules can be dissolved into water.   This may be for a variety of reasons.  There are many methods of dissolving ozone into water, however, the following 3 are most common.

Bubble diffuser

The bubble diffuser is the oldest and most common method of dissolving ozone into water.  Using a bubble diffuser is also the lowest cost injection method of dissolving ozone into water.  However, this is generally the least efficient method of dissolving ozone into water.  In many bubble diffuser applications much of the ozone is locked up in gas bubbles that rise to the surface of the water and escape completely.

Ozone Venturi

The ozone venturi, or injector as it is commonly refereed to is a very efficient and most widely used modern method of dissolving ozone into water.  By using a pressure differential across a small orifice a vacuum is created on an inlet port.  This inlet port can mix ozone with the water in a violent and very efficient method.

Learn more about the mazzei injector directly on the mazzei website here

Static Mixer

A static mixer can mix ozone with the water after it has been forced into the water stream by a direct injection port.  This can be accomplished by increasing the ozone pressure to a higher pressure than the water pressure to force the ozone gas into the water stream.  This is not a commonly used method, but does have some application.  Static mixers can also be used after the Mazzei injector.

Click here to learn more about the static mixer for ozone

How to measure ozone in water?

Ozone can be measured in water using a variety of methods.  The following three are the most common.

Indigo

The most common and reliable is the indigo colorimetric kit that can be evaluated by visual or photometer methods.  Common test kits can be purchased for this purpose.  Below is an example:

K-7402 Vacuvial Kit

Electrochemical Sensor

The second is the inline method using electrochemical sensor cell with electrolyte solution.   These sensors will use a sensor cell that is placed directly into your water flow, or a diverted water flow and give a real time dissolved ozone reading.

Dissolved Ozone Sensor

Indirect Measurement

The indirect measurement of ozone is not widely used or understood.  This method measure the level of ozone that has off gassed from the water and provides a calculated reading based upon Henry’s law.  These sensors may take a sample, or be an inline real-time sensor.

Dissolved ozone sensor

Any Questions?

Feel free to contact Ozone Solutions with any questions you have on Ozone in Water, or any other ozone related questions you may have.