Introduction to Ozonation

Ozonation is the process of introducing ozone gas (O3) into a substance, typically water, to purify and disinfect it. Ozone is an unstable form of oxygen (O2) with a powerful oxidizing effect, making it effective at destroying a wide range of pollutants and harmful microorganisms, such as bacteria, viruses, and algae. Ozonation replaces chlorine and other chemical disinfectants in water treatment, offering an environmentally friendly and efficient alternative.

Ozone is a triatomic form of oxygen with the chemical formula O3. Its three oxygen atoms strongly influence its reactivity; the extra oxygen atom can easily attach to other substances. That means ozone is an unstable molecule that decomposes into oxygen molecules. So, it must be generated on-site as used. The Typical half-life of ozone at 20 C is 3 days and 20 minutes when ozone is dissolved in water.

Industrial ozone generation is typically done using a process in which high-voltage electrical energy is applied to an oxygen-rich gas mixture. It is simply a diffused spark through a dielectric to spread out the electrical discharge to a large area. In this method, the electric charge applied to the electrodes causes some oxygen molecules to split apart and temporarily combine with other oxygen molecules making a molecule of three oxygen atoms (O3).

The ozonation process involves introducing ozone gas into the water being treated. This can be done using a venturi injector to dissolve ozone directly into the water. Once ozone is in the water, it reacts with contaminants and pollutants, breaking down their chemical structures and rendering them harmless. Ozone is a strong oxidant and virucide widely used for drinking water disinfection and wastewater treatment plants. The effectiveness of a biocide in the ozonation system is normally described by its concentration-time or CT value, which is defined as a product of the average concentration of ozone(residual ozone) multiplied by the exposure time

Ozonated water is water that has been infused or treated with ozone (O3). It readily reacts with other substances, often breaking them down or neutralizing contaminants. When ozone is introduced into water, it serves several purposes, including:

1. Disinfection: Ozonated water is commonly used as a disinfectant because ozone kills bacteria, viruses, and other microorganisms. It can be used in water treatment plants, swimming pools, and even for cleaning and sanitizing purposes in various industries.
2. Wastewater Treatment: Ozone can be employed in wastewater treatment to break down organic and inorganic pollutants, making the water cleaner and safer for the environment.
3. Food and Beverage Processing: Ozonated water is sometimes used in the food and beverage industry to sanitize and disinfect food products, equipment, and packaging.
4. Drinking Water Treatment: Some municipalities use ozone as part of their drinking water treatment process to disinfect and remove impurities from the water supply.
5. Laundry and Cleaning: Ozonated water can be used in commercial laundry operations and industrial cleaning processes due to its sanitizing and stain-removing properties.

1. Ozone: Ozone is generated on-site using ozone generators. The cost of ozone generation equipment and maintenance can vary. Still, overall, Ozone is considered cost-effective due to its fast action and high disinfection efficacy. Ozone systems require an initial investment but can result in long-term cost savings.
2. Chlorine: Chlorine-based disinfectants are widely available and relatively inexpensive. However, costs can vary depending on the concentration and form of chlorine (e.g., liquid chlorine, chlorine gas, or solid chlorine compounds). Handling and storage of chlorine products may also incur additional costs.
3. UV-C Light: UV-C light systems can have higher upfront costs for installation and equipment purchases. Additionally, UV-C lamps require periodic replacement, which adds to the maintenance cost.

Ozone is a very strong oxidant and virucide widely used for disinfection; it destroys bacteria by inducing protoplasmic oxidation, resulting in cell wall disintegration.

• Ozone is an excellent broad-spectrum oxidizing.
• Ozone is a strong chemical oxidant
• Reduces the toxicity of organic compounds
• can be combined with UV or Peroxide to generate hydroxyl radicals to create an advanced oxidation process

The effectiveness of a biocide in the ozonation system is normally described by its concentration-time or CT value, which is defined as a product of the average concentration of ozone( residual) multiplied by the exposure time

Ozonation is an efficient and effective way to purify water, offering a range of benefits over traditional methods such as chlorination. Here are some of the key benefits of ozonation for drinking water purification:

1. Powerful Disinfection: Ozone is a highly reactive oxidizing agent, which makes it effective at destroying a wide range of pathogens, including bacteria, viruses, and algae. It is also effective at destroying other harmful contaminants such as pesticides and organic matter.
2. Safe and Environmentally Friendly: Unlike chemical disinfectants such as chlorine, ozone is not toxic to humans or the environment. Ozone breaks down into oxygen after use, leaving no harmful residuals in the water. This makes it a safer and more environmentally friendly alternative to traditional water purification methods.
3. Faster and More Efficient: Ozonation is faster and more efficient than traditional water purification methods, such as chlorination. In many cases, ozonation can be completed in a fraction of the time required for conventional methods, and it is often more effective at achieving desired levels of water purity.
4. Improves Water Quality: Ozonation not only disinfects water but also enhances its overall quality. Ozone oxidizes and removes organic matter, improving the taste and odour of the water. It also helps to clarify the water by removing impurities, resulting in a clearer, more transparent appearance.
5. Cost-Effective: While the initial investment for ozonation equipment may be higher than traditional water purification methods, the overall cost is often lower. This is because ozonation is faster and more efficient, reducing the amount of time and resources required for water treatment. In addition, the lack of toxic residuals means that there are no disposal costs associated with ozonation, making it a more cost-effective option in the long term.

Feed Gas:
Oxygen-feed ozone generators are the best choice for all industrial applications.

We recommended using PSA Oxygen concentrators to produce Ozone
oxygen concentrator produces oxygen with 90-95% of purity
Oxygen feed Ozone generator results in a concentration of 4-20 wt.%
Air feed Ozone generator results in a very lower concentration of 1-3 wt.% (not suitable for ozonation)
Air-feed generators are not suitable for most industrial applications. Remember that only 21% of air is oxygen this significantly affects the ozone concentration that a generator can achieve. In addition, inside the cells, the remaining 78% of the nitrogen will form nitric oxide deposits. In this way, ozone production will gradually decrease after a few months. lear more

Ozone Generators:
Absolute Ozone® – ozone generators are equipped with a Dielectric Barrier Plasma Discharge cell. Air-colled Absolute Ozone® generators produce ozone at very high concentrations, typically in the range of 5 to 16 wt.%.

• Low Oxygen Requirement 2-3 slpm for 1 ppd of ozone
• High-Pressure Range 10-120 PSIG working pressure
• PCOP System – Pressure Compensated Ozone Production System
• Air Cooled, works well at up to +40C, no need to pay for water, water conditioning & air conditioning systems
• No Maintenance, no serviceable parts, leakproof construction tested at up to 150 PSIG, reliable, less operating cost.
• 5 Years Warranty & “Right on Spec” Performance Warranty, The only warranty that guarantees performance, in the ozone industry
  Check this article to learn how to size an ozone generato

Ozone Mass Transfer:
Ozone needs to be dissolved in water. Ozone is partially soluble in the liquid; its solubility depends on factors such as temperature, pressure, and concentration. However, high mass-transfer efficiencies can be achieved with appropriate methods and equipment. Venturi-based mass transfer systems are preferred for dissolving ozone in water due to their simplicity, economy, and effectiveness. A venturi injector is about 90% efficient and can be up to 99% efficient at dissolving ozone into the water.