Method and device for sewage treatment

• Main Authors: Zhaoguang Yang, Haipu Li, Jingjing Yao, Nadi Yuan, Qingqing Dong, Ximei Dai, Siyuan Pan
• Format: Patent
• Language: English
• Published: 07.09.2022
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

A sewage treatment device comprises a treatment tank, a power and electric control unit, and a gas supply and tail gas recovery unit. The treatment tank is provided with a liquid inlet 30, liquid outlet 18, gas inlet and exhaust gas outlet 25. An external recycling circuit comprising a pump 32 is provided to circulate liquid from the liquid outlet to the liquid inlet. The treatment tank may contain a treatment unit comprising a micro-nano aeration disk 19, a cathode 21, a three-dimensional particle electrode 22, a ferrate adding port 23 and an anode 24. The gas inlet communicates with the micro-nano aeration disk to supply gas thereto, wherein the gas can be air, pure oxygen or ozone. When an air source or pure oxygen source is used, the system generates hydrogen peroxide in-situ. The air source or pure oxygen source can be used as oxygen sources for an ozone generator 10. When ozone is utilised, the sewage treatment device can function as a combined electrocatalytic ozone and potassium ferrate treatment system. A persulfate layer can be located between the cathode and the anode.