基于A/O工艺的己内酰胺废水脱氮技术研究  

Research on Denitrification Technology of Caprolactam Wastewater Based on A/O Process

作　　者：李雪珺 凌文华 姚国栋 周仰原[1] 赵建夫[1] Li Xuejun;Ling Wenhua;Yao Guodong;Zhou Yangyuan;Zhao Jianfu(State Key Laboratory of Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Tongji University,Shanghai 200092;Zhejiang Baling Hengyi Caprolactam Co.,Ltd.,Hangzhou 311228,China)

机构地区：[1]同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092 [2]浙江巴陵恒逸己内酰胺有限责任公司,浙江杭州311228

出　　处：《广东化工》2022年第1期12-15,共4页Guangdong Chemical Industry

基　　金：国家重点研发计划项目(2018YFC1902103)。

摘　　要：生物法是石化行业废水处理中的常用方法之一,A/O工艺是常见的污水处理方法,两级A/O工艺则可以强化硝化和反硝化过程,对高含氮有机废水来说是较为理想的水处理手段。针对某化工企业的己内酰胺废水处理工艺,研究了A/O工艺和两级A/O工艺对己内酰胺废水的脱氮率影响。研究结果表明,A/O工艺对己内酰胺废水的脱氮效率仅为53.6%,投加甲醇碳源后,脱氮率可提升至85.0%,出水总氮可降至40 mg/L。两级A/O串联工艺对己内酰胺废水的脱氮率在投加甲醇碳源后,出水总氮可降至11.2 mg/L,脱氮率可达96.2%,两级A/O工艺可以有效提高总氮去除率。Biological method is one of the commonly used methods in wastewater treatment in petrochemical industry. A/O process is a common sewage treatment method, and two-stage A/O process can strengthen the nitrification and denitrification process, which is more suitable for high-nitrogen organic wastewater.Ideal water treatment method. Aiming at the caprolactam wastewater treatment process of a chemical enterprise, the influence of A/O process and two-stage A/O process on the denitrification rate of caprolactam wastewater was studied. The research results show that the denitrification efficiency of the A/O process for caprolactam wastewater is only 53.6 %. After adding methanol carbon source, the denitrification rate can be increased to 85.0 %, and the total nitrogen in the effluent can be reduced to 40 mg/L. The denitrification rate of caprolactam wastewater by the two-stage A/O tandem process can be reduced to 11.2 mg/L in the effluent after the addition of methanol carbon source, and the denitrification rate can reach 96.2 %. The two-stage A/O process can effectively improve Total nitrogen removal rate.

关 键 词：两级A/O 己内酰胺废水 脱氮 碳源 活性污泥 

分 类 号：TQ[化学工程]