Industrial ozone generation is used in controlled treatment systems rather than simply releasing ozone into open environments. The generated gas is normally transferred into water, process gas, or a contained treatment chamber where the intended chemical reaction takes place.

Ozone is not normally stored in large quantities for industrial use because it breaks down relatively quickly. Instead, it is generally generated on-site when required. The World Health Organization describes ozone as a strong oxidant used in water treatment and notes that ozone gas can be produced by passing dry air or oxygen through a high-voltage electric field.

How Ozone Generation Works

A common industrial ozone generator uses corona discharge technology. In simple terms, dry oxygen-containing gas passes through an electrical field created between electrodes. The electrical energy separates some oxygen molecules into individual oxygen atoms, which can then combine with other oxygen molecules to form ozone.

A simplified sequence is:

• Gas preparation: Air or oxygen is dried and filtered.

• Electrical generation: A high-voltage electrical field is created inside the ozone cell.

• Oxygen activation: Some O₂ molecules are split into oxygen atoms.

• Ozone formation: Individual oxygen atoms combine with O₂ to create O₃.

• Gas delivery: The ozone-containing gas is transferred to the treatment area.

• Off-gas control: Remaining ozone is destroyed or treated before discharge when required.

Moisture control is important because water vapor can interfere with ozone generation and contribute to unwanted reactions inside the system.

Main Components

An industrial ozone generator can contain several interconnected components.

Ozone generation cells create the electrical discharge needed to produce ozone.

Oxygen or air preparation systems provide suitable feed gas. Oxygen concentration and dryness can influence generator performance.

High-voltage power supplies provide controlled electrical energy to the generation cells.

Cooling systems remove heat produced during electrical operation. Temperature control is important because ozone production and stability are affected by operating temperature.

Ozone concentration monitors measure the concentration of ozone in the generated gas or treatment system.

Injection systems transfer ozone into water or another treatment medium.

Ozone destruct units break down unused ozone before treated gas is released from a closed process.

Importance

Water Treatment

Water treatment is one of the major applications of industrial ozone generation. Ozone can oxidize certain organic compounds and can act as a disinfectant.

The WHO describes ozonation as a water-treatment process that can be used for oxidation of organic chemicals and as a primary disinfectant. It also notes that ozone does not provide a lasting disinfectant residual in distribution systems, so additional treatment may be needed depending on the water system.

Applications can include:

• Drinking-water treatment

• Wastewater treatment

• Process-water treatment

• Industrial water reuse

• Aquaculture water management

• Selected food and beverage water systems

The appropriate ozone dose depends on water chemistry, organic matter, microorganisms, temperature, contact time, and other treatment conditions.

Wastewater Treatment

Ozone can be used in selected wastewater processes to oxidize certain compounds and support treatment objectives. It may be applied as part of an advanced treatment stage after other physical, biological, or chemical processes.

The performance of ozonation depends heavily on the characteristics of the wastewater. Substances in the water can consume ozone before it reaches the intended target, making monitoring and process control important.

Food and Beverage Processing

Ozone can be used in controlled food-processing environments for selected applications involving water, surfaces, equipment, and certain food products.

Because ozone decomposes into oxygen and does not leave the same type of persistent chemical residual as some conventional disinfectants, it has attracted interest in certain processing applications. However, each application needs appropriate concentration, contact time, material compatibility, and regulatory assessment.

Air and Gas Treatment

Industrial ozone systems can also be incorporated into controlled gas-treatment processes. Ozone can react with selected odor-producing compounds and other oxidizable substances.

This is different from using an ozone generator as a general-purpose air cleaner in an occupied room. The U.S. Environmental Protection Agency states that ozone generators should not be used in occupied spaces and that ozone at concentrations within public-health limits has limited effectiveness for controlling indoor air pollutants.

Industrial Process Applications

Depending on the process, ozone can be used in areas such as:

• Pulp and paper processing

• Textile processing

• Aquaculture

• Cooling-water treatment

• Industrial wastewater treatment

• Odor control in controlled systems

• Selected chemical oxidation processes

• Food-processing environments

• Drinking-water treatment

Important Operating Factors

Recent Updates

Greater Use of On-Site Generation

Because ozone is reactive and decomposes relatively quickly, industrial systems generally generate it close to the point where it will be used.

Modern installations can combine ozone generators with oxygen concentrators, gas dryers, injection equipment, sensors, contact tanks, and ozone destruct units. This creates a more integrated treatment process rather than relying on a standalone generator.

Advanced Monitoring

Ozone treatment systems increasingly use sensors and control systems to monitor ozone concentration, gas flow, pressure, temperature, dissolved ozone, and other operating parameters.

Automated controls can adjust generator output according to process requirements. This can help maintain more consistent treatment conditions and reduce unnecessary ozone production.

Oxygen Feed Systems

Industrial ozone generators may use air or concentrated oxygen as the feed gas. Oxygen-fed systems can produce higher ozone concentrations than many air-fed configurations and can be useful where the treatment process requires greater ozone transfer.

Feed-gas selection depends on generator design, required concentration, process conditions, and plant infrastructure.

Improved Cooling and Electrical Systems

Modern ozone generators use controlled power electronics and cooling arrangements to manage the heat associated with ozone production.

Stable temperature and electrical operation can help maintain predictable generator performance. Heat removal can involve air cooling, water cooling, or other engineered arrangements depending on system size.

Water Treatment Technology Development

The WHO's updated Guidelines for drinking-water quality, published in 2026, continue to provide a global framework for managing drinking-water quality through risk-based approaches and appropriate treatment technologies. Ozone remains among the treatment processes described within WHO drinking-water guidance.

WHO material explains that ozone can be used for microbial inactivation and oxidation of selected organic substances. It also emphasizes the importance of water characteristics, ozone dose, contact conditions, monitoring, and control of reaction products.

Greater Attention to Ozone Safety

As industrial ozone use expands across different treatment applications, monitoring exposure has become an important part of system design.

Ozone is a respiratory irritant. NIOSH identifies a ceiling recommended exposure limit of 0.1 ppm, while the U.S. OSHA permissible exposure limit is 0.1 ppm as an eight-hour time-weighted average under its cited occupational standard.

Industrial systems therefore commonly use leak detection, ventilation, enclosed equipment, alarms, interlocks, and ozone destruct systems as appropriate to the application.

Laws or Policies

Regulations Vary by Country

There is no single worldwide law governing every industrial ozone generator. Requirements can vary according to the application, country, workplace, water system, environmental conditions, and equipment design.

A drinking-water plant may face different requirements from a food-processing facility or industrial wastewater plant.

Organizations should therefore identify the regulations that apply to their specific process and location.

Occupational Exposure

Workplace exposure limits are an important consideration because ozone can irritate the respiratory system.

In the United States, OSHA lists an ozone permissible exposure limit of 0.1 ppm as an eight-hour time-weighted average under its air-contaminant requirements. NIOSH also lists a 0.1 ppm ceiling recommended exposure limit.

These figures are examples of U.S. occupational requirements and guidance rather than a universal global limit. Other jurisdictions may use different limits or measurement periods.

Water Treatment Requirements

When ozone is used for drinking-water treatment, the complete water-treatment system must meet the applicable national or regional drinking-water requirements.

The WHO's 2026 drinking-water guidance provides an international technical reference for risk management, treatment selection, monitoring, and water safety. National regulators may establish their own legally enforceable requirements based on local conditions.

Equipment Standards and Certification

Industrial equipment may be subject to electrical, pressure, machinery, environmental, and workplace safety requirements.

In India, for example, the Bureau of Indian Standards provides the Know Your Standard platform for searching applicable Indian Standards by keyword or standard number. BIS also explains that some products become subject to mandatory conformity requirements when specifically covered by government notifications.

Similar conformity systems exist in many other regions through national standards organizations and regulatory authorities.

Indoor Air Restrictions

Ozone generators require particular caution when used for air treatment. EPA guidance states that ozone generators should not be used in occupied spaces because ozone can irritate the airways.

Industrial applications should therefore distinguish between contained process treatment and direct ozone release into occupied areas.

Tools and Resources

Ozone Concentration Monitors

Ozone monitors measure the amount of ozone present in gas streams or surrounding areas. They can be used for process control, leak detection, and workplace monitoring.

Dissolved Ozone Sensors

For water-treatment systems, dissolved ozone measurement can help determine how much ozone remains in treated water.

This information can help operators understand whether the treatment system is receiving and transferring ozone as intended.

Oxygen Concentrators

Oxygen concentrators can provide a more concentrated oxygen feed for ozone generators. The appropriate configuration depends on generator capacity and required ozone concentration.

Ozone Destruct Units

Ozone destruct systems remove residual ozone from off-gas before discharge. Thermal, catalytic, and other technologies can be used depending on the installation.

Contact Tanks and Diffusers

In water treatment, ozone can be transferred into water through diffusers, injectors, or other gas-liquid contact systems.

The WHO describes systems in which ozone-enriched gas is introduced into water through diffusers inside contact tanks, followed by treatment of remaining off-gas.

Process Control Systems

Programmable controllers, sensors, flow meters, pressure sensors, temperature monitoring, and alarms can be integrated into industrial ozone systems.

These tools help coordinate ozone generation with water flow, gas flow, contact conditions, and safety controls.

Technical and Regulatory Resources

Useful references include:

• WHO drinking-water guidance: Provides international information on ozonation and water-treatment processes.

• OSHA ozone information: Provides U.S. occupational exposure information.

• NIOSH Pocket Guide: Provides chemical hazard and exposure information for ozone.

• National standards bodies: Provide equipment and process requirements applicable to individual countries.

• Manufacturer technical documentation: Provides information about generator capacity, feed-gas requirements, operating conditions, and maintenance procedures.

FAQs

What are Industrial Ozone Generators?

Industrial Ozone Generators are machines that produce ozone gas for controlled applications such as water treatment, wastewater treatment, selected food-processing operations, gas treatment, and industrial oxidation processes.

How do Industrial Ozone Generators work?

Most industrial systems create ozone by passing dry air or oxygen through a high-voltage electrical field. The electrical energy separates some oxygen molecules, allowing oxygen atoms to combine with O₂ and form O₃.

Where are Industrial Ozone Generators used?

Industrial Ozone Generators are used in drinking-water treatment, wastewater treatment, aquaculture, selected food and beverage applications, pulp and paper processing, textile processes, controlled gas treatment, and other oxidation applications.

Is ozone safe to breathe?

Ozone can irritate the eyes and respiratory system, and elevated exposure can create significant health hazards. Industrial systems should therefore use appropriate containment, monitoring, ventilation, alarms, and exposure controls. OSHA and NIOSH publish occupational exposure information for ozone.

Can ozone generators be used in occupied rooms?

Direct ozone generation in occupied spaces requires particular caution. EPA states that ozone generators should not be used in occupied spaces because ozone can irritate the airways. Industrial ozone applications are generally designed around controlled and contained treatment processes rather than unrestricted release into occupied areas.

Conclusion

Industrial Ozone Generators produce ozone on-site for controlled oxidation and treatment applications across water, wastewater, food processing, industrial processes, and selected gas-treatment systems. Corona discharge technology, oxygen preparation, cooling, monitoring, injection, and residual-ozone control are important parts of modern ozone-generation systems. Recent developments emphasize automation, process monitoring, efficient oxygen use, and stronger attention to exposure control. Because regulations vary between countries and applications, industrial ozone systems should be designed and operated according to the relevant technical, workplace, environmental, and water-quality requirements.