厌氧和高级化学氧化联合深度处理高浓度印染废水

Combination of Anaerobic Treatment and Advanced Oxidation Process for High Strength Printing and Dyeing Wastewater Tertiary Treatment

采用ABR厌氧+好氧生物法处理COD约为3 000 mg/L的印染废水,ABR池的HRT为22 h,对COD的去除率约为30%,污泥负荷为1.2 kg COD/(kg MLSS·d),B/C值从0.16提高到了0.19。经过好氧处理后BOD_5<5 mg/L,采用O_3和生物滤池组合工艺进一步处理尾水,m_(O3)∶m_(COD)为4∶1,生物滤池的HRT为9 h,处理后的尾水COD<50 mg/L,水质澄清,能满足回用要求。

The combination process of anaerobic baffled reactor （ABR） and aerobic reactor was used to treat the printing and dyeing wastewater. The COD of raw wastewater was about 3 000 mg/L. from 0. 16 to 0. 19. The effluent of ABR was treated in the aerobic treatment process. The effluent BOD5 of the aerobic process was less than 5 mg/L. In the advanced treatment process, e.g. combination of O3 oxidation and biological filter, when mO3： mCOD ratios was controlled as 4 ： 1 and HRT was kept as 9 h, the final effluent COD was below 50 mg/L. The final water quality could meet the requirements of reuse.