On the other hand, the ozonation process is completely natural and works via UV radiation from the sun. Once the water has been oxidized, the ozone gas turns back into oxygen, which is why ozonated water is considered to be very healthy to drink. All of these impurities are removed when the ozonation process occurs.
The ozone molecule is inorganic and is comprised of three oxygen atoms. This composition means that the ozone molecule exists as a highly reactive gas. There are many additional uses of ozonated water aside from drinking it.
For instance, this water can be used for disinfection and cleaning purposes while also being beneficial for dental use. When looking at the ozonation process, there are numerous advantages that come with using this process to purify water, which include:.
Once the ozonation process has been completed, all viruses, protozoans, and bacteria should be removed from the water.
There are also numerous disadvantages of ozonation that you should take into account, which include:. However, the potency of this process means that there will invariably be some issues to take into account. While ozonated water is commonly used for disinfection and cleaning, it can also be used for water therapy and dental use. The purity of this water makes it beneficial for a variety of reasons. You should start out with one cup of ozonated water in a day before working your way up.
This type of water also helps to reduce the amount of inflammation in your body , which can be helpful for lessening the symptoms of migraines, digestive disorders, and arthritis.
Reduction of disinfection byproducts and improved disinfection Disinfection byproducts DBP are mainly formed during the reaction between organic material and a disinfectant. Ozone is a more effective disinfectant than chlorine, chloramines , and even chlorine dioxide. An ozone dose of 0,4 mg L-1 for 4 minutes is usually effective for pre-treated water low NOM concentration [39].
Several studies proved that ozone, unlike chlorine products, can deactivate resistant micro-organisms see resistant microorganisms page. However, as ozone rapidly decomposes in water, its life-span in aqueous solutions is very short less than one hour. Therefore ozone is less suitable for residual disinfection and can be used only in particular cases mainly in short distribution systems.
Chlorine and chlorine dioxide often replace ozone as a final disinfectant. For primary disinfection prior to the bio filtration , ozone is very suitable. This will lead to a more complete disinfection and a lower disinfectant concentration. Odor and taste elimination Odor and taste production in drinking water can have several causes. Odor and taste forming compounds can be present in raw water, but they can also be formed during water treatment.
These compounds may derive from the decomposition of plant matter, but normally they are a result of the activity of living organisms present in the water [5]. Inorganic compounds such as iron , copper and zinc can also generate some taste.
Another possibility is that the chemical oxidation chlorine treatment leads to an unpleasant tastes and odors. Odor and taste forming compounds are often very resistant.
This causes elimination to be a very intensive process [33]. For the elimination of taste and odor, several processes can be appropriate, such as oxidation, aeration, granular active carbon GAC filtration or sand filtration. Usually, a combination of these techniques is applied. Ozone is more effective for the oxidation of unsaturated compounds. As was the case for the oxidation of pesticides, ozone combined with hydrogen peroxide AOP process is more effective than ozone alone.
While ozone has a short half life in water at typical conditions found in water treatment, it can persist for hours. If down stream corrosion or process contamination are a concern, measures need to be taken to reduce or eliminate the residual of ozone. In some applications such as drinking water treatment ozone residual can create an unsafe working environment. In northern climates, some of the treatment processes might be housed indoors, but open to the ambient air in the building, residual ozone in the water from these processes can enter the work area.
Where this off-gassing can cause a health and safety concern removal of the ozone residual or quenching is employed. There are three basic approaches to decomposing ozone in water: UV radiation, chemicals and activated carbon. One method to decompose and destroy ozone is by UV light. Ultraviolet systems are highly effective for destroying ozone in process water. Chemicals or heat are unwanted processes in most high purity water treatment processes.
This makes UV the method of choice to break down the ozone in a simple flow-through physical process.
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