Water pollution is a major problem that affects both our environment and public health. Contaminants in water can cause serious health problems, and some can even be lethal. Ozone has been shown to be an effective treatment method for water pollution, and it’s a much more sustainable option than traditional methods like chlorination. Ozone is a natural gas that is created when pure oxygen molecules are split into three separate atoms.

When ozone is injected into polluted water, the extra oxygen atom binds to pollutants and eliminates them from the water. Ozone is also very effective at killing bacteria, making it an ideal treatment method for wastewater. In addition to being environmentally friendly and effective at removing pollutants, ozone is also cost-effective. It’s a relatively new technology,

Ozone is commonly used in water treatment because of its excellent disinfection and oxidation qualities. Ozone is utilized in a variety of applications and ways, each with its own set of rules and procedures for implementing and delivering it.

Ozone has a wide range of applications and purposes in water treatment. Ozone may be used as a disinfectant, decolorizer, deodorizer, detoxifier, precipitator, coagulant, and flavor remover. As a result, when there is a need to treat any of these water concerns, or particularly if pathogens are suspected, ozone should be utilized because it is such an efficient biocide.

Ozone is a non-toxic, chemical-free water treatment technique that eliminates chemicals and residuals while also lowering by-products and new residuals in water. There are no remaining residues in the water after ozone treatment because to the fact that ozone breaks down back to only oxygen. Ozone can also lower chemical demands as it coagulates and precipitates a variety of chemicals on its own, and it’s also a decent flocculation agent. As a result of this, it may help to decrease other chemical requirements in treatment plants.

Oxidation With Ozone

Oxidation with ozone is a cost-effective method for lowering chemical expenses and energy use. Ozone is the most powerful and efficient broad spectrum biocidal or disinfectant available. The Ct (concentration & time) for Giardia cysts inactivation using free chlorine is around 100 times greater than that achieved with ozonation. For viruses, the chlorine Ct is about six times greater than the ozone Ct. The US EPA recommends ozonization as the best disinfectant for Cryptosporidia due to its effectiveness in killing.

Ozone is a less hazardous alternative to other chemicals. There is less need to apply significant dosages of a long-lasting poison to water that will become drinking water in the future. When chlorine is utilized in water treatment, the amount of chlorine needed is significantly reduced because it is only required as a residual in the distribution system at low concentrations. This reduces the risk of generating carcinogenic THMs and other chlorine by-products.

Ozone has a long track record of safety and efficacy. It may also reduce overall chemical usage since it is able to disinfect without adding additional chemicals that will subsequently have to be removed.

What Can Ozone Treat In Water?

Ozone may be used to oxidize basically anything that is oxidation-able. Ozone can react with all substances, except inert gases. Any molecule that is not in its final state of oxidation may be oxidized by ozone. Even some fully oxidized molecules may react with the radicals and other started reactions produced when ozone decomposes in water.

Ozone can be utilized in water treatment where Chlorine (Cl2), Chlorine dioxide (ClO2), Potassium permanganate (KMnO4), Ultraviolet light (UV), Hydrogen peroxide (H2O2), Oxygen (O2) or aeration are used or considered for usage. Ozone is also used to treat some other fungi, such as Aspergillus and Fusarium. Ozone can be combined with other treatments, including the Advanced Oxidation Processes (AOPs), for particular situations or issues.

Ozone is recognized for its capacity to decrease the molecular weight of molecules, including those from bacteria cell walls or a carbon source that causes water coloration or poor taste.

Ozone-treated water may need to be filtered or settled, as ozone tends to coagulate and precipitate a variety of contaminants.

In general, water quality issues that are frequently treated with acid, peroxide, chlorine, or other oxidants may benefit from ozonated treatment.

When the problem with water quality cannot be solved with ozone, it is likely that no other available oxidant will succeed.

Ozone can be used to treat the following contaminants or issues:

  • Metals – Iron, Manganese and many other
  • BOD & COD – reacts quickly, as ozone is a really active form of oxygen
  • Bacteria – all known, including iron bacteria
  • Organics – algae, color, other carbon compounds
  • Protozoans – all known, including Cryptosporidium, Giardia and all Amoebae
  • Viruses – all known
  • Minerals – dyes, inorganics, and others
  • The Hydroxyl Radical (OH-), created by the combination of ozone and UV or hydrogen peroxide, is a more powerful oxidation product than either substance used alone. 

Bottom Line

Ozonation is an effective water treatment process that can be used to improve the quality of drinking water and wastewater. It is a versatile method that can be customized for each application, making it a good choice for many facilities.