Myth: Eliminate Hot water when washing with Ozone - While this may be possible when washing extremely light soil, it can prove disastrous for medium to heavy soil items. Medium to heavy soil needs some temperature to open up natural fibers or to soften synthetic fibers to help release imbedded soils. Cold water congeals and coagulates fibers as well as soils making it harder to lift them off the fabric to improve on saponification (Chemical activity to break down fats & oils). Without some moderate temperature in the wash bath, soils will not be able to lift off the fabric. Body soils and sun tan lotions will have a hard time getting into suspension at low temperature. Fats, oils and greases will act the same as body soils at low temperature and be left on the fabric. The use of all cold water may require additional wash steps to remove heavier soils due to congealing and coagulation properties of cold water increasing wash time.
Myth: Washing with ozone means I can get rid of alkali, chlorine bleach, sour and softener and simply use detergent. This can only work on extremely light soil (see above). While it is true that ozone and Chlorine bleach counteract with each other, an ozone system using Chlorine Bleach for Stain removal, should have a built-in bleach kill mechanism to allow the bleach to do what it does best, bleach stains. Cold water wash formulas for food and beverage items not only interfere with good quality wash formulations, they can be dangerous when linens are put in the dryer and lead to spontaneous combustion from residual fats & oils in the fabric. The use of Alkali, detergents, bleach and sour are still necessary ingredients for a high quality wash. Since Ozone and Chlorine Bleach do interact, you may be able to eliminate the use of an Anti-Chlor.
Myth: My chemical costs will be cut in half. This relates to the above myth. Every laundry is different with different challenges; from incoming water quality to different soil removal and staining issues. The chemistry of each laundry is different and should be treated as such. It’s the ozone company’s responsibility to work with the chemical representative to ensure good laundering results. While a reduction in chemistry can be anticipated, (see above) it tends to be in the 20-25% range mainly reducing sour/softener and Anti-Chlor in the final wash operations...
Myth: The only way to infuse ozone in to the wash is with a venturi system. Although a Venturi infusion system is most practical when there is a stream of water that can be used to create a vacuum in the line, Direct Infusion adapts to the laundry wash system in a more efficient manner. The ozone infusion can be continuous rather than depend on a water flow. In this way water supply manifolds constructed on non-ozone resistant material will not be exposed to ozone deterioration. The ozone can be applied where needed and when needed in each step of each wash formula. The use of a properly designed Small Bubble Diffuser `improves the ozone dispersion without the negative vacuum developed in the Venturi to make it work.
In summary, ozone on its own with detergent and cold water simply cannot work on medium to heavy soils, it never has worked and never will. Ozone is as a gaseous Chemical, enhances the wash process, which limits (but does not eliminate) hot water and overall water use. Savings can still be very good with a 70-80% reduction in hot water and a 20-25% reduction in overall water. With this moderate approach in mind, paybacks can generally still be achieved in less than two years. Most importantly the laundry quality can improve while reducing Green House Gas and VOC (Volatile Organic Compounds) emissions and reduce waste water treatment.