Abstract:

The combined process,optimized two-stage A/O+advanced oxidation,has been used for treating integrated printing and dyeing wastewater. The results show that after being treated by the two-stage A/O biochemical treatment process,NH₃-N,TN,TP,BOD₅ of the tail water are 2.34,9.75,0.67,13.1 mg/L respectively. After the tail water is treated by Fenton or ozone oxidation process,the effluent COD,and chroma are lower than 60 mg/L and 30 times,respectively. It is met than the First-B of the Discharge Standard of Pollutants in Urban Sewage Treatment Plants. The reaction conditions of Fenton oxidation are as follows:pH is 4-5,hydrogen peroxide 600 mg/L,ferrous sulfate 120 mg/L,and PAM 2 mg/L. The cost of chemicals treatment per ton of water is ￥1.22,lower than the cost of the ozone oxidation method.

Key words: wastewater in a printing and dyeing industrial park, two-stage A/O, Fenton oxidation, ozone oxidation

摘要：

采用优化两级A/O+高级氧化组合工艺处理印染综合废水.结果表明,通过两级A/O生化处理工艺后,尾水NH₃-N、TN、TP、BOD₅分别为2.34、9.75、0.67、13.1 mg/L,尾水采用Fenton或臭氧氧化后出水COD、色度分别低于60 mg/L及30倍,达到《城镇污水处理厂污染物排放标准》一级B标准.Fenton氧化的反应条件为:pH 4~5,双氧水、硫酸亚铁、PAM的投加质量浓度分别为600、120、2 mg/L,吨水药剂处理成本为1.22元,低于臭氧氧化的成本.

关键词: 印染工业园废水, 两级A/O, Fenton氧化, 臭氧氧化

CLC Number: 

• X703