Overview of Ozone Generation Technology
Release date:
2021-07-19
Currently, there are many methods for artificially producing ozone. Based on their underlying principles, these methods can be categorized into photochemical, electrochemical, atomic radiation, electrolysis, and corona discharge techniques. The atomic radiation method is used extremely rarely; in the pharmaceutical and food industries, the electrolysis-based ozone generation technology is predominantly employed. In wastewater treatment applications, the corona discharge method is more commonly used to produce ozone sources.
Corona discharge synthesis of ozone is currently one of the most widely used ozone-generation technologies. This technology can achieve an ozone production rate of over 500 kg/h per unit. The corona discharge method—also known as silent discharge or glow discharge—is a technique in which a dry oxygen-containing gas stream is passed through a corona discharge zone to generate ozone. Commonly used feed gases include oxygen, air, and oxygen-containing mixed gases that may contain nitrogen, chlorine, carbon dioxide, or other inert diluent gases. Most applications involve wastewater treatment, during which nitrogen oxides may be produced.
The electrolytic ozone technology features a novel PEM membrane that uses low-voltage DC current to electrolyze deionized water through solid-state membrane electrodes. At the special anode-solution interface, water is separated into hydrogen and oxygen molecules via proton exchange. Hydrogen is directly released from the cathode solution interface, while oxygen molecules, upon being excited by electrons generated under high-density current at the anode interface, gain energy and combine to form ozone molecules. Compared with conventional corona discharge generators, this method offers the following advantages: The ozone gas produced has a much higher concentration—several times greater by weight than that produced by corona discharge generators, reaching up to 20% (over 250 mg/L). Moreover, the ozone gas produced contains no nitrogen oxides (NOx) and is free of carcinogenic substances. During operation, the system exhibits excellent resistance to environmental humidity, maintaining stable ozone production even in highly humid conditions up to 85%. Thanks to the use of low-voltage DC electrolysis, the process generates neither electromagnetic interference nor noise, ensuring no disruption when operating alongside other sensitive instruments. Due to its high ozone concentration, the same amount of ozone introduced into water using this method can achieve significantly higher residual ozone levels, making it ideal for sterilizing and disinfecting drinking water as well as for producing high-concentration ozonated water (a powerful disinfectant). This technology boasts a remarkably long service life—several times longer than that of corona discharge ozone generators—and the membrane electrodes have an exceptionally long lifespan. It finds wide-ranging applications in the pharmaceutical and food industries, as well as in hospitals, households, and other settings for the preservation and disinfection of spaces and food products.
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