己内酰胺污水处理技术研究

Study on Treatment Technologies of Caprolactam Wastewater

为处理己内酰胺生产废水,基于己内酰胺的生产工艺和废水中污染物的成分来源,分析了芬顿氧化、ABR厌氧、好氧、AOP氧化对己内酰胺废水的处理效果。结果表明,完全利用废水中的残余双氧水进行芬顿氧化,废水中COD去除率可高达30%;ABR厌氧处理对COD去除率达60%,且64%的总氮完全反硝化化为N 2;好氧处理对COD去除率达80%,出水COD降至200 mg/L左右,氨氮降至检测限以下;臭氧-双氧水联用AOP氧化可将COD降至50 mg/L以下,使出水达到石油化工工业的污水综合排放标准一级标准。

In order to treat caprolactam wastewater,based on the production process of caprolactam and the source of pollutants in wastewater,the treatment effect of Fenton oxidation,ABR anaerobic,aerobic and AOP oxidation on caprolactam wastewater was studied.The results show that Fenton oxidation on use of residual hydrogen peroxide from wastewater removes 30%of COD from wastewater;ABR anaerobic treatment removes 60%of COD from wastewater,and 64%of TN completely denitrifies to N 2;aerobic treatment removes 80%of COD,and the COD in effluentis decreases to about 200 mg/L,while the ammonia nitrogen reduces below the detection limit;AOP oxidation with ozone-hydrogen peroxide reduces COD to less than 50 mg/L.The effluent can reach the first class standard of wastewater discharge standard of petrochemical industry.