High-efficient treatment of coking wastewater through multi-dimensional catalytic oxidation

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High-Efficiency Treatment of Coking Wastewater through Multidimensional Catalytic Oxidation Author/Source: China Chemical Industry News Date: 2019-02-22 Clicks: 1 A coal coking plant in Shanxi has built a new wastewater treatment facility using the multidimensional catalytic oxidation technology developed by Jiangsu Bomeide Environmental Protection Technology Co., Ltd., to treat wastewater generated in coal tar chemical processing. The water treatment plant has been in operation for 6 months now, and the quality parameters of the treated water meet the standards required for enterprise reuse (class III discharge standards). The coal tar chemical wastewater from this enterprise in Shanxi has a complex composition, containing components such as oil, ammonia nitrogen, sulfides, and volatile phenols; the COD level in this wastewater is as high as 40,000 mg/L. Jiang Aoqi, general manager of Bomei De, explained that the COD level of the wastewater treated by this project is below 500 mg/L, with a removal rate of over 90%. The color intensity is removed by more than 95%, while volatile phenols and cyanides are removed at a rate of over 96%. Benzene derivatives and other similar compounds are removed at a rate of over 95%. “Given the complex composition of wastewater, we adopted multi-dimensional catalytic oxidation technology. Under the presence of surface catalysts, this technology utilizes a strong oxidant—hydrogen peroxide—to catalytically oxidize organic pollutants in wastewater at normal temperature and pressure, directly oxidizing and effectively removing these organic pollutants. At the same time, during the degradation of COD, the chromophoric double bonds in organic molecules such as azo groups, nitro groups, thiohydroxyl groups, and carbimino groups are broken, thereby achieving decolorization. This also effectively increases the BOD/COD ratio, making it easier for the substance to be biodegraded. ”Jiang Aoqi said. The efficient surface catalysts (various rare metals) used in this technology are supported on activated carbon, subjected to multiple impregnations, and treated at high temperatures. During the catalytic oxidation process, this catalyst exhibits excellent degradation performance on wastewater containing benzene rings, with a high removal rate of COD. Jiang Aoqi emphasized.