Toshiba's Ozone Technology provides
Water Purification


-Ozone Generator System-


Ozone Generator System
  • Client

    Toshiba Infrastructure Systems & Solutions Corporation

  • Services

    water purification

  • Technologies

    Ozone Technology

  • Dates



Why Ozone?

Effect of Ozone

Effect of Ozone

Advantages of Ozone Treatment

1 Ozone is a powerful oxidant, stronger than chlorine. Therefore, ozone is used to disinfect, deodorize, decolorize and decompose organic substances in water. Ozone is also used to prevent trihalomethane formation in water.

2 Ozone molecules are unstable in water, decaying to ordinary diatomic oxygen. Therefore, ozone systems have low impact on the environment.

3 Since ozone generators need only a feed gas and electrical power, ozone can be generated on-site as necessary without any need for transportation or storage.

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Ozone Generator System TGOGS

Principles of Ozone Generation

Silent discharge produces a large volume of ozone efficiently.
It continuously occurs without sparks when a high alternating-current voltage is applied between two electrodes placed parallel to each other through a dielectric material.
When dry air or oxygen flows between the electrodes, oxygen atoms(O) are ionized, and ozone(O3) is formed by recombination of ionized oxygen atoms(O) and unionized oxygen molecules(O2).

Principles of Ozone Generation
High Efficiency and Low Power Consumption
  • Accurate and narrow discharge gap
  • Designed using simulation technology
High Safety Level
  • Rigorous testing
  • Substantial test facility
High Reliability and Durability
  • Discharge tubes equipped with their own fuse
  • Stainless steel high-voltage electrodes
Easy Maintenance
  • Light and easy-to-handle parts
  • Simple structure
Long Life
  • Corrosion-resistance high-voltage electrode
  • Develop new technology at in-house research laboratories

History of Toshiba's Ozone Generator System

  • Launched a large cylindrical ozone generator
  • Performed ozonation to oxidize NOx in exhaust gas from thermal power generation
  • Developed a flat plate ozone generator
  • Introduced a high-frequency (1 kHz) power device and cylindrical type ozone generator to achieve high ozone concentrations and improve efficiency
  • Applied ozone generator system for discoloration of treated water from night soil disposal plants in Japan
  • Supplied the largest scale (31 kg/h) air-fed ozone generator
  • Supplied an oxygen-fed ozone generator
  • Developed a coplanar discharge ozone generator
  • Introduced ozone generators for advanced water treatment to reduce trihalomethanes in tap water, and for advanced sewerage treatment to reclaim water
  • Supplied a high-concentration air-fed model (3 wt%)
  • Developed optimized ozone injection control system utilizing fluorescence intensity
  • Developed generators with enhanced energy-saving and ozone concentration performance
  • Japan Invention Awards: Japan Business Federation Award Invention of an ozone-based chemical decontamination technology
  • Japan Ozone Association's Technology Award Development of an ozone-based chemical decontamination technology for nuclear power plants
  • Developed the TGOGS™ high-efficiency ozone generator series
  • Introduced fluorescent control method for the first time in a water purification plant in Japan to reduce bromic acid, inject optimized ozone and adapt to sudden changes in the quality of influent water

Wide-ranging Applications

Municipal Use


Water Purification Plants

Advanced water treatment method
ozone treatment procedure differs according to the purpose of treatment. The ozone injection point is determined according to the expected effect or the type of substance to be treated.

  • Reduction of trihalomethanes (THMs)
  • Improvement of odor and color
  • Reduction of organic compounds
  • Disinfection
  • Removal of inorganic materials such as iron and manganese
Water purification plant

Sewerage Treatment Plants

  • Disinfection
  • Improvement of odor and color
Sewerage treatment plants

Industrial Use



  • Reduction of chemical oxygen demand (COD)
  • Improvement of odor and color
  • Decomposition of persistent substances such as endocrine disruptors and medicines
Suitable for Application in:
  • Dye works
  • Oil and gas plants
  • Food and beverage factories
  • Iron-making factories
  • Pharmaceutical plants
  • Metal plating factories
  • Sugar factories
  • Leachate treatment plants
  • Pulp and paper plant
  • ...and more

Cooling Water for Thermal Power Generation Plants

  • Disinfection
  • Prevention from scaling
Advantages of Ozone Purification
  • Reduction of operation and maintenance costs
  • Reduction of blowdown and make-up water
  • Since ozone is decomposed into oxygen, no harmful substances are left or mixed into blowdown water.
Cooling water for thermal power generation plants

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System Configuration

Toshiba provides flexible system configurations tailored to suit your particular treatment requirements and capacities.
The configurations of ingredient gas suppliers, cooling systems, waste ozone decomposition systems and reaction tanks are customized according to the inflow water quality, treatment capacities, and places of installation.
Toshiba considers various situations when offering ozone treatment systems with reliability, economic efficiency and maintainability.

System Configuration

Layout of Devices

Toshiba proposes a suitable system layout, considering electrical equipment; piping for ingredient gas, cooling water and gases containing ozone; ease of operation and maintenance; work environment safety; and efficient use of installation space.

Example of containerized type

Example of containerized type

Example of layout and piping

Example of layout and piping

Monitoring and Control

Toshiba offers good monitoring and control systems using reliable electrical and instrumentation technologies cultivated over many years of experience.

Monitoring and control

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Product Line-up

Oxygen fed
Ozone production: to 120 kg O3 /h
Concentration: to 13 wt%
Specific energy: 7 to 8 kWh/kg O3*
Regulation range: 10 to 100%

* "With cooling water inlet temperature of 15 ?

Air fed
Ozone production: to 50 kg O3 /h
Concentration: to 3 wt%
Specific energy: 14 kWh/kg O3*
Regulation range: 10 to 100%

* “With cooling water inlet temperature of 15 ?

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