In the ozone laundry industry, there are several approaches or methods used to dissolve ozone gas into water. Each of these methods is described below. Only one of these methods, the ‘Contact Tank’ method, addresses all of the requirements necessary to achieve reliable and
One of the oldest and least effective is the ‘Bubbling’ or ‘Sparging’ method. This is where ozone is made and simply bubbled into the bottom of the washing machine with what amounts to an aerator stone like you would see at the bottom of a fish tank. This is the least effective method because the ozone is actually in contact with the water for the least amount of time and there is no pressure exerted upon the mixture of gas and water. In addition to that, bubbling ozone gas into a washing machine greatly increases the chances of worker exposure to ozone gas.
Another method, called ‘Direct Injection’ is where ozone gas is injected directly into the cold water line right before the water empties into the washing machine. This method is only slightly more effective than the bubbling method. The ozone gas only has a fraction of a second to be in contact with the wash water before it empties into the washer. The improved effectiveness is related to the pressure inside of the pipe where the ozone gas and the water mixture are for this limited time. The pressure facilitates enhanced ‘mass transfer’ of the ozone gas into solution. This method also greatly increases the chances of worker exposure to ozone gas because of the gas being discharged directly into the washer.
A third method is called ‘Side-Arm Injection’. This method is truly the most complicated and expensive and only
Superior Method: Contact/reaction tank
At Water Energy, we have developed the ‘Contact Tank’ method to achieve superior results. This method is by far the very best way to achieve the desired level of dissolved ozone in your wash water. The Water Energy Ozone Laundry System uses a tall, stainless steel contact tank as part of a completely sealed system to facilitate
Other Methods we have heard of but don’t know how to classify:
One company out there literally pressurizes the washing machine and adds ozone gas directly to the pressurized washer. This is infinitely naïve. First of all, you should add the ozone independently of the washing machines. This will greatly reduce the risk of worker exposure to ozone gas and eliminate the possibility of corroding your expensive laundry equipment. Gaseous ozone is highly corrosive and liquid-phase ozone (ozone dissolved in water) is considered non-corrosive. Also, it is very expensive to close-up all the holes in a washer in order to pressurize it. Why waste your money on something that is ineffective! With this method, the risk of worker exposure to ozone gas is drastically higher because the washing machine contains pressurized ozone gas in close proximity to the laundry workers and the workers must continuously open the washers to add and remove linen. It just doesn’t make any sense to do it this way. These are but a few of the reasons to reject this approach.
Another company has equipment that supposedly makes several ‘forms’ of ozone that aren’t affected by heat and are deactivated when produced then after being transferred to the washers via tubing, are magically ‘reactivated’ where they can go about their job of cleaning and sanitizing. At Water Energy, we obey the physical laws and we know that there is only one type of ozone and once it is ‘deactivated’, it cannot be reactivated without going back through an ozone generator or a lightning storm. Don’t fall for any magic tricks. Rely on real equipment from real people. Rely on Water Energy Ozone Laundry Systems.