公开(公告)号：US20240279091A1

公开(公告)日：2024-08-22

申请号：US18564782

申请日：2022-01-21

Applicant: ORGANO CORPORATION

Inventor： Hironori YUI ,  Kenta SUGA ,  Issei YOSHIDA ,  Fumio SUDO

IPC: C02F1/76 ,  C02F1/70 ,  C02F3/00 ,  C02F3/10 ,  C02F101/34 ,  C02F101/38

CPC classification number: C02F1/766 ,  C02F1/70 ,  C02F3/106 ,  C02F2003/003 ,  C02F2101/34 ,  C02F2101/38 ,  C02F2209/22 ,  C02F2303/185

Abstract: The purpose is to provide a pure water production method and apparatus, which make it possible to prevent the increase in an ion load during a pure water production process, improve the efficiency of a biological treatment and reduce the generation amount of pulverized coal in a method for treating oxidation-treated water in which urea is oxidized and decomposed with a hypohalous acid with biological activated carbon. Provided is a pure water production method including: for adding a hypohalous acid to urea-containing water of interest and performing an oxidation treatment of the urea in an oxidation treatment apparatus; and measuring the concentration of residual chlorine in the oxidation-treated water, then adding hydrogen peroxide to the oxidation-treated water depending on the measured concentration of the residual chlorine, and then performing a biological treatment of the hydrogen peroxide-added water with biological activated carbon in a biological treatment apparatus.