The 1,4-dioxane is removed by the accelerated oxidation method using ozone and hydrogen peroxide.
1,4-Dioxane is classified by the International Agency for Research on Cancer as Group 2B (possibly carcinogenic to humans), and discussions are currently underway in the Central Environmental Council's Water Environment Subcommittee to establish discharge standards. 1,4-Dioxane is poorly biodegradable and cannot be removed by biological treatments such as conventional activated sludge treatment, coagulation and sedimentation, or sand filtration. Additionally, adsorption treatment using activated carbon has a relatively low adsorption efficiency. Currently, the advanced oxidation process, which has a proven track record in the decomposition of dioxins, is the most effective treatment method.
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basic information
At Kyowa Chemical, 1,4-Dioxane is removed using an advanced oxidation method with ozone and hydrogen peroxide. This advanced oxidation method is characterized by its low initial and running costs since it does not use ultraviolet light, and it can be processed stably through automation.
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Applications/Examples of results
We generate OH (hydroxyl radical), which has an oxidation power about 1.4 times that of ozone, to carry out oxidation treatment.
Company information
Since our founding, we have been working daily to improve water treatment technology with the theme of "restoring natural water." In the treatment of wastewater from meat processing centers, we developed the unique Kyowa-style two-stage oxidation method, establishing ourselves as pioneers in high-concentration treatment. Additionally, at the leachate treatment facility for final disposal sites, we have introduced the first desalination system in the water treatment industry and are expanding it nationwide. Furthermore, based on our additional theme of "purifying water and revitalizing the earth," we are undertaking a new business initiative focused on ultra-high-temperature aerobic fermentation treatment using YM bacteria. At the Environmental Microbiology Research Institute, we have invited the renowned researcher Dr. Tairo Oshima, who is well-known in the field of ultra-high-temperature aerobic microorganisms, to work daily on the creation of technologies and the development of new techniques using microorganisms.