改性赤泥絮凝—臭氧氧化处理模拟印染废水

Treatment of Simulated Dyeing Wastewater by Modified Red Mud Flocculation-Ozone Oxidation Process

采用改性赤泥絮凝—臭氧氧化法处理直接酸性大红4BS、活性黄KD-3G、分散红S-R、酸性黑ATT、硫化黑BRN等不同类型的5种模拟印染废水。对比了单独改性赤泥絮凝、单独臭氧氧化和改性赤泥絮凝—臭氧氧化三种方法在处理不同模拟印染废水时的COD及色度去除效果。实验结果表明:改性赤泥絮凝—臭氧氧化法对不同类型模拟印染废水的COD及色度去除效果均明显优于单独改性赤泥絮凝法和单独臭氧氧化法;在臭氧使用量减少50%的情况下,5种模拟印染废水的COD去除率为88.9%～96.6%,脱色率均高于99.0%。

Five kinds of simulated dyeing wastewaters containing different dyes of direct acid red 4BS,reactive yellow KD-3G,disperse red S-R,acid black ATT and sulphur black BRN were treated by modified red mud flocculation-ozone oxidation process.Three processes,modified red mud coagulation,ozone oxidation and modified red mud flocculation-ozone oxidation,were contrasted on the removal effects of COD and chroma of the different wastewaters.The experimental results show that: The removal efficiency of the modified red mud flocculation-ozone oxidation process is the best;By this process,the removal rates of COD in the 5 kinds of wastewaters are 88.9%-96.6% and the decolorization rates are all above 99.0% with 50% decrease of ozone dosage.