臭氧联用技术深度处理腈纶废水的效果对比

将臭氧分别与超声波、H2O2、紫外光等联用，深度处理干法腈纶生产厂生化池出水，对各种联用技术的处理效果进行了研究。实验结果表明：在进水流量2 L/min、反应时间30 min、臭氧加入量3.5 g/（L?h）的条件下，当超声功率为300 W时，臭氧-超声联用技术的COD去除率为30.0%；当H2O2加入量为0.4 mL/L时，臭氧-H2O2联用技术的COD去除率为50.7%；当紫外灯功率为40 W时，臭氧-紫外光联用技术的COD去除率为49.9%；在各种联用技术中，臭氧-H2O2联用技术的运行成本最低（为7.5 元/t），且处理后出水COD为143 mg/L，达到《<污水综合排放标准>（GB8978—1996）中石化工业COD标准值修改单》中的一级排放标准。综合考虑，臭氧-H2O2联用技术是深度处理干法腈纶废水的最优工艺。

Comparison between Ozonation-combined Processes on Advanced Treatment of Acrylic Fiber Wastewater

The ozonation processes combined with ultrasonic,H₂O₂ and UV respectively were used in the advanced treatment of bio-treated effluent in an acrylic fiber plant with dry process. The treatment effects were studied. Under the conditions of influent flow 2 L/min,reaction time 30 min and O₃ dosage 3.5 g/(L·h),the COD removal rate of the O₃-ultrasonic process is 30.0% when the ultrasonic power is 300 W,the COD removal rate of the O₃-H₂O₂ process is 50.7% when the H₂O₂ dosage is 0.4 mL/L,the COD removal rate of the O₃-ultraviolet process is 49.9% when the UV lamp power is 40 W. The running cost of the O₃-H₂O₂ process is the lowest (7.5 yuan/t),and the effluent COD is 143 mg/L,which can meet the first grade discharge standard of GB 8978-1996. Considering comprehensively,the O₃-H₂O₂ process is the optimum process for advanced treatment of the wastewater in acrylic fiber production with dry process.