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For wastewaters from industries such as coal chemical industry, new materials, petrochemical industry, smelting and non-ferrous metals, electronics, and pharmaceuticals—which contain pollutants like high COD, high ammonia nitrogen, high organic nitrogen, high salt, cyanide, heavy metals, and refractory organic substances—the company has mature technical means including "advanced catalytic oxidation, anaerobic denitrification, and hardness & fluoride removal". It also selects appropriate pretreatment technologies based on the specific characteristics of different water qualities to effectively remove characteristic pollutants and improve the biodegradability of the wastewater.