Hydrogen peroxide decomposition system, hydrogen peroxide decomposition device, and method for decomposing hydrogen peroxide

Abstract

The present invention provides a hydrogen peroxide decomposition system that can effectively decompose hydrogen peroxide contained in a liquid to be treated while reducing equipment costs. The hydrogen peroxide decomposition system in the embodiment includes a plurality of hydrogen peroxide decomposition devices 1, 2, and 3, each of which includes a decomposition tank 10 that stores activated carbon 11 for decomposing hydrogen peroxide contained in a liquid to be treated, a storage tank 20 for storing the liquid to be treated that has passed through the activated carbon 11 of the decomposition tank 10, and a circulation feed section 30 that feeds the liquid to be treated stored in the storage tank 20 to the activated carbon 11. In the plurality of hydrogen peroxide decomposition devices 1, 2, and 3, the liquid to be treated in the hydrogen peroxide decomposition device 3 at the final stage is discharged when the hydrogen peroxide concentration of the liquid to be treated in the hydrogen peroxide decomposition device 3 at the final stage is below a target concentration, and the liquid to be treated in each of the hydrogen peroxide decomposition devices 1, 2, other than the final stage, is fed to the hydrogen peroxide decomposition device at the next stage, and the plurality of hydrogen peroxide decomposition devices 1, 2, and 3 are configured so that the liquid to be treated in each of the hydrogen peroxide decomposition devices is circulated below a predetermined temperature.

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