臭氧氧化-A2/O工艺处理含吡啶有机废水的研究

摘要

Ozonation-A2/O process has been used for treating pyridine-containing organic wastewater in a factory. The pilot test indicates that the optimal reaction conditions for ozonation process are as follows:reaction time is 120 min,initial pH is 5 and ozone dosage 1.20 g/L. Under these conditions,the removing rates of pyridine and TOC reach 35% and 36%,respectively,and the wastewater B/C ratio increases from 0.22 to 0.36. After treated by Ozonation-A2/O process,the mass concentrations of pyridine,TOC and COD in effluent are all maintained at less than 20 mg/L,90 mg/L and 350 mg/L respectively. The water quality of effluent reaches the third-level standard specified in the 'Integrated Wastewater Discharge Standard'(GB 8978—1996). The effluent can be discharged to the chemical industrial zone where the factory is located for carrying out the subsequent treatment.%采用臭氧氧化-A2/O组合工艺对某企业含吡啶有机废水进行处理.小试试验确定臭氧氧化工艺的最佳反应条件:反应时间为120 min,反应初始pH为5,臭氧投加量为1.20 g/L.此时,废水中吡啶和TOC的去除率分别达到35%和36%,B/C由0.22提高至0.36.经臭氧氧化-A2/O组合工艺处理后,出水中的吡啶、TOC、COD质量浓度分别稳定在20、90、350 mg/L以下,出水水质达到《污水综合排放标准》(GB 8978—1996)中的三级标准,可以排入该企业所在的化工园区集中污水处理厂进行后续处理.