Ozone Solutions sells the Chemetrics K-7402 Vacuvial kits. These are a great coloremetric kit to verity dissolved ozone levels in water.
The K-7402 test kit comes with everything necessary for 30 tests. After 30 tests a refill kit is necessary. This is part number R-7402.
We just lowered the price from $29.97 to $23.26. This lowers testing cost from $1.00 per test to $0.78 per test. If you are in need of a great reference standard for dissolved ozone, the K-7402 test kit may be the perfect tool for the job.
This week last week I was in Georgia installing and performing start up on a few Ozone Systems. These are pictures of an installation of a Waterzone-20 Ozone Injection System for use in a chicken processing plant. This system was installed above the production line in a clean, dry storage room.
This system is used to inject water into ozone for salmonella destruction on chicken. Chicken breasts are passed on a conveyor under a spray bar of aqueous ozone. Water is injected with ozone to maintain a 2 – 3 ppm ozone residual in the water. This is measured and controlled by the AS-500 Dissolved Ozone Meter installed on the system. Water is plumbed with stainless steel piping into the Ozone System, then down to the processing area below where the chicken breasts are sprayed with aqueous ozone.
Ball valves and a sample port have been installed by the customer to by-pass the Ozone System and adequately verify dissolved ozone levels in the water.
The Waterzone-20 Ozone Injection System can be turned ON and OFF remotely by the operators in the processing room below. Connections are provided in the Waterzone-20 to start and stop the system, and also to verify there are no alarm conditions causing the dissolved ozone level to be low.
Here is an interesting chart for you. This shows the solubility of ozone into water at varying temperatures. This a great way to illustrate how much of a difference temperature plays on dissolved ozone levels.
Several conclusions can be postulated from the chart. They are the following:
lower temperature permit higher dissolved ozone concentrations
higher ozone concentrations in the ozone gas permit higher dissolved ozone concentrations
Ozone Solubility vs. Temperature is a linear relationship with virtually no ozone solubility above 43-deg C (110-deg F)
Just how soluble is ozone?
Ozone is extremely soluble! At 25 deg C, ozone solubility is 109 mg/l. The solubility of oxygen is 8 mg/l. Ozone is 13 times more soluble than oxygen.
This first video is a typical ceramic bubble diffuser. This is a 80 micron diffuser. The gas flow is altered from very low, 1 LPM to a max flow of 10 LPM. This shows that the ceramic diffuser creates very small bubble size at low flow rates, however the bubble size increases as the flow rate increases. This shows the importance of using these diffusers only within the rated flow rates.
This second video is of the porous PTFE tubing bubbling ozone into water. This tubing creates bubbles about 100 micron in size. While PTFE tubing will have a long life, and will prevent any buildup or contamination to the diffuser over time, it does create the largest bubbles of the diffusers in our test.
This last video is of a stainless diffuser with a 20 micron rating. This video shows a range of flow from 20 SCFH, to 180 SCFH (3 CFM). This clearly shows that the smaller micron rating creates much smaller ozone bubbles in the water.
While all these diffusers have pro’s and con’s these video’s give a very informative visual as to the operation of these differs in water. We hope this information helps you make decision on the best possible diffuser for your application.
Here at Ozone Solutions we are constantly looking for ways to improve our products. Most recently we have made some major changes to our Waterzone-30 and Waterzone-40 Ozone Injection Systems.
The major update to this system is the Ozone Generator. We are now using a modular Ozone Generator that integrates directly into the control panel. This saves space and provides one central control panel for all controls. The depth of these systems has been reduced 10 inches, the width has been reduced by 5 inches.
The Waterzone-40 now uses a water cooled Ozone Generator. The water to cool the Ozone Generator is obtained from the current pressure differential created by the injection pump. This is a novel advance that lowers heat, cuts power consumption, and creates ozone at a higher concentration.
The oxygen flow rate has been reduced on these systems from 10 LPM to 7 LPM. This reduction lowers compressed air needs. Either with an internal compressor or with plant compressed air, this is a net power savings.
To see more information on these please view our website. For application questions, pricing, and to find out if this is the right solution for you, feel fee to contact our office and ask for our application engineers.
We now offer an alternative for calibrating larger dissolved monitors or to test dissolved ozone levels in a lab setting. The SAM-2 and the SAM-3 monitors are inexpensive dissolved ozone monitors that are both compact and reliable.
The SAM-2 has a range of 0.15-0.75 PPM, making it perfect for lab settings. No activator solution is required, which helps to cut costs. This monitor reads the ampoule that needs to be tested, and then will read a blank reference ampoule that is provided. If your ozone levels exceed its range, that is okay. Just dilute a fresh sample and retry the test! When you multiply the reading by the dilution factor you will have an accurate result. It is that simple.
The SAM-3 has a range of 0.20-3.00 PPM which makes it more appropriate for calibrating dissolved ozone monitors that are constantly in use (for example, an AS-500 on an ozone injection system). Using this analyte meter to calibrate your monitor monthly will help ensure accurate readings. This unit is also very simple to use – just zero it using the provided blank ampoule, and it is ready to test. This only needs to be done once (not between every test), which will speed up the testing process. After the unit is zeroed, you can test any number of ampoules.
You can get more information on these monitors by visiting the SAM-2 or SAM-3 on our website.
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.
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.
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.
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:
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.
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.
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