US/UV/混凝多重协同臭氧氧化处理航空工业荧光废水的研究

Study on the combined treatment of fluorescence wastewater from aviation industry by US/UV/coagulation multiple synergistic ozone oxidation treatment technology

航空工业荧光废水采用US/UV/混凝多重协同臭氧氧化处理工艺进行处理,固定紫外强度为110 W,考察了超声强度、臭氧流量、氧化时间、废水pH值、絮凝剂种类、絮凝剂投加量等对处理效果的影响。结果表明,最佳絮凝反应选择Al 2Cl n(OH)6-n作为絮凝剂,投加量为6 mL/L,pH值为7,静置时间为40 min;超声氧化选择超声强度为320 W,臭氧流量为50 mg/min,反应时间为60 min,反应pH为7。经过超声臭氧氧化-絮凝联合工艺处理后出水COD的质量浓度为403.2 mg/L,去除率达到85.6%,悬浮物浓度为7.12 mg/L,色度为20倍,pH值为7,出水水质达到2016年8月1日实施的GB/T 31962—2015《污水排入城镇下水道水质标准》的要求。

The fluorescent wastewater of the aviation industry is treated by US/UV/coagulation multiple synergistic ozone oxidation treatment process,with a fixed UV intensity of 110 W,and the influence of factors such as ultrasonic intensity,ozone flow rate,oxidation time,wastewater pH value,flocculant type,and flocculant dosage on the wastewater treatment effect was investigated.The results show that the best flocculation reaction is Al 2Cl n(OH)6-n as the flocculant,the dosage is 6 mL/L,the pH is 7,and the standing time is 40 min;the ultrasonic intensity is 320 W and the ozone flow rate is 50 mg/min,the reaction time is 60 min,and the reaction pH is 7.After ultrasonic ozone oxidation-flocculation combined process,the mass concentration of COD in the effluent is 403.2 mg/L,the removal rate is 85.6%,the concentration of suspended matter is 7.12 mg/L,the chroma is 20 times,the pH value is 7,and the effluent quality reaches the requirements of GB/T 31962—2015“Water Quality Standard for Sewage Discharged into Urban Sewers”implemented on August 1,2016.