Method for removing COD (Chemical Oxygen Demand) in red mud leachate through catalytic ozonation

• Main Authors: HE FEI, LI JIANZHANG, WANG HAIFENG, LIU DEKUAN, LUO YONGFEI
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2023
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a method for removing COD (Chemical Oxygen Demand) in red mud leachate through catalytic ozonation, and belongs to the technical field of sewage treatment. The method comprises the following steps: pretreating the red mud leachate, and carrying out catalytic ozonation on the obtained liquid material to obtain an oxide material; a catalyst used for catalytic ozonation is a manganese-based catalyst; and deoxidizing the oxide material to obtain treated effluent. According to the method disclosed by the invention, the strong oxidizing property of ozone is utilized, and organic matters in the red mud leachate are oxidized and decomposed into CO2 and H2O under the action of the manganese-based catalyst, so that the content of COD (Chemical Oxygen Demand) is reduced, and efficient removal of COD in the red mud leachate is realized. After the leachate is treated by the method, the COD (Chemical Oxygen Demand) in the effluent is less than 30mg/L. 本发明提供了一种臭氧催化氧化去除赤泥渗滤液中COD的方法，属于污水处理技术领域。本发明将赤泥渗滤液