Abstract: A kind of advanced treatment process of tail water in chemical industrial parks-the combined process Fenton + BAF is introduced. The process running effect shows that when the system influent COD is about 140 mg/L, the COD removing rate by the combined process can reach 55%,of which the COD removing rate by Fenton oxidation process reaches 40%,and that by BAF process reaches 30%. The effluent water quality can stably reach the standard. The running cost of the system is about RMB 2.94 per ton. The HRT of traditional Fenton oxidation pond can be optimized to 3 h. Within the first 2.5 h of HRT time,the reduction range of wastewater COD and ammonia nitrogen of BAF pond is relatively high,the COD reduction capacity can reach 20%.

Key words: Fenton oxidation, biological aerated filter, tail water of chemical industrial parks

摘要： 介绍了一种化工园区尾水深度处理工艺——Fenton+BAF组合工艺。工艺运行效果表明：当系统进水COD在140 mg/L左右时，组合工艺对COD的去除率可达到55%，其中Fenton氧化工艺COD去除率达到40%，BAF工艺COD去除率达到30%，出水水质能够稳定达标，系统运行费用约2.94元/t。传统Fenton氧化池的HRT可优化至3 h；BAF池在前2.5 h的停留时间内，对废水COD、氨氮的削减幅度相对较高，COD削减量可达到20%。

关键词: Fenton氧化, 曝气生物滤池, 化工园区尾水

CLC Number: 

• X703.1