BCO+BAF工艺深度处理洗涤剂废水

Advanced treatment of detergent wastewater by BCO and BAF process

采用生物接触氧化(BCO)+曝气生物滤池(BAF)组合工艺深度处理洗涤剂废水,研究了溶解氧浓度(DO)、水力停留时间(HRT)对其处理性能的影响。实验结果表明,随着DO浓度的提高,组合工艺对COD和LAS的去除率都随之增加;水力停留时间的增加有利于对COD与LAS的去除,最佳停留时间选为21.2h为宜;在BCO段DO为3.0 mg/L,HRT为20.0 h,BAF段DO为4.0 mg/L,HRT为1.2 h的运行条件下,COD与LAS的去除率分别为90.5%和94.3%,出水COD和LAS均能达到排放标准。

The effects of disolved oxygen concentration( DO) and hydraulic retention time( HRT) on the advanced treatment capacities to treat the detergent wastewater were studied by the experiment adopting the combined process of biological contact oxidation( BCO) and biological aerated filter( BAF). The results showed that the removal rates of the combined process on COD and LAS went up with the increasing of DO concentration. Increasing of HRT was propitious to the removal of COD and LAS,and the optimal time was 21. 2 h. The removal rates of COD and LAS could reach 90. 5% and 94. 3%,respectively under the following conditions: DO concentration of 3. 0 mg / L and HRT of 20. 0 h in BCO stage,DO concentration of 4. 0 mg / L and HRT of 1. 2 h in BAF stage. Thus,the COD and LAS of effluent water could reach the discharge standard.