公开(公告)号：US11787717B2

公开(公告)日：2023-10-17

申请号：US17057050

申请日：2020-02-24

Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Weiqing Han ,  Tao Cui ,  Kajia Wei ,  Wei Li ,  Lianjun Wang ,  Xiaodong Liu ,  Xiuyun Sun ,  Jiansheng Li ,  Jinyou Shen

IPC: C02F9/00 ,  C02F1/461 ,  C02F1/467 ,  C02F1/66 ,  C02F101/34 ,  C02F101/38

CPC classification number: C02F9/00 ,  C02F1/4672 ,  C02F1/46109 ,  C02F1/66 ,  C02F2001/46133 ,  C02F2001/46171 ,  C02F2101/34 ,  C02F2101/38 ,  C02F2201/4614 ,  C02F2301/046 ,  C02F2305/026

Abstract: The present invention discloses an electrocatalytic Fenton oxidation-electrochemical oxidation coupling process and apparatus for efficient treatment of chemical wastewater, and belongs to the field of sewage treatment. The process includes an electrocatalytic Fenton oxidation step, an electrochemical oxidation step, and a pH adjustment step. A spacing between a cathode and an anode in the electrocatalytic Fenton oxidation step is controlled, so that oxygen produced at the anode reacts at the cathode to produce H2O2. The treatment requirements can be met without external aeration or external addition of H2O2, and meanwhile, the efficiency of COD removal by electro-Fenton oxidation is effectively improved. Further, by connecting a pH adjusting tank with the electrocatalytic Fenton oxidation-electrochemical oxidation coupling apparatus in series, a coupling treatment process with near-zero production of iron sludge is realized.