超声-Fenton法处理甲硝唑制药废水的研究

Study on treatment for pharmaceutical wastewater of metronidazole by ultrasound-Fenton process

实验采用超声-Fenton法处理甲硝唑废水.通过测定COD值的变化得到处理的效果,通过静态实验研究Fe^(2+)投加量、H_2O_2投加量、pH值和超声反应时间对COD去除率的影响.正交实验结果表明,各因素影响显著性的先后顺序为H_2O_2投加量>Fe^(2+)投加量>pH值>超声反应时间.研究结果表明,对于COD为1 010.5 mg/L的甲硝唑制药废水,在Fe^(2+)的投加量为0.06 mol/L,H_2O_2投加量0.25 mol/L,pH值为3,超声时间为60 min的条件下,COD去除率可达到95%,处理后COD质量浓度为50.5 mg/L,达到国家一级排放标准.说明超声-Fenton法对甲硝唑制药废水有良好的处理效果.

Ultrasound-Fenton process was used to treat metronidazole wastewater.The treatment effect could be known by measuring the change of COD value.The effect on the COD removal was studied in these static experiments of the Fe^2＋ dosage,H2O2 dosage,pH value and the reaction time of ultrasound.The results of the orthogonal experiment showed that the decreasing sequence of those factors on influencing significance were H2O2,Fe^2＋,pH and ultrasound treating time.The study results indicated that for the simulated wastewater of metronidazole with a concentration of 1 010.5 mg/L.The COD removal ratio could reach the maximum of （95%） when the concentration of Fe^（2＋） was 0.06 mol/L,H2O2 was 0.25 mol/L,pH value was 3 and ultrasound reaction time was 60 min and on these conditions the concentration of COD in the effluent decreases to 50.5 mg/L,which can meet the first level of national discharging standard of pharmaceutical wastewater.It illustrated that the ultrasonic-Fenton method had good effect on the treatment of metronidazole pharmaceutical wastewater.