己内酰胺生产废水深度脱氮技术研究  

Research on Advanced Nitrogen Removal Technology of Industrial Wastewater from Caprolactam Production

作　　者：翁晓姚 周仰原[2] 姚国栋 WENG Xiaoyao;ZHOU Yangyuan;YAO Guodong(Shanghai Chengtou WaterCo.,Ltd.,Shanghai 200002,China;State Key Laboratory of Pollution Control and Resources Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海城投水务<集团>有限公司,上海200002 [2]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

出　　处：《净水技术》2022年第S02期127-132,共6页Water Purification Technology

基　　金：国家重点研发计划项目(2018YFC1902103)。

摘　　要：己内酰胺生产废水具有COD高、氨氮高、组分复杂、可生化性差等特点,属于难处理的化工废水。尽管现有废水处理工艺出水氨氮质量浓度可降至1 mg/L以下,但TN普遍仍较高(质量浓度>100 mg/L)。针对某企业己内酰胺生产废水深度脱氮需要,以及改造场地受限的实际,探讨了将现有O池分隔出部分空间,改造为AO池,形成二级AO串联工艺的可行性;设计搭建了1 m^(3)/h中试处理装置,研究了该串联工艺结合投加碳源对TN去除的影响。结果表明:不需新增场地,通过将现有O池改造,组成二级AO串联工艺,结合投加碳源,可将己内酰胺生产废水TN质量浓度稳定降至20 mg/L以下。研究为高氮化工废水的深度脱氮处理提供参考。The wastewater of caprolactam production has distinctive characteristics, including high COD and ammonia nitrogen,complex components, and poor biodegradability. It belongs to the chemical wastewater which is difficult to treat. Although ammonia nitrogen of effluent could descend to 1 mg/L, TN usually was above 100 mg/L. In view of the need for deep denitrification of caprolactam wastewater from an enterprise and the fact that the reconstruction site was limited, the feasibility of partial separation of the existing O tank into an AO tank to form a two-stage AO series process was discussed. A pilot plant with 1 m^(3)/h flow was built and the influence of this process with carbon source for TN removal was investigated. The results showed the TN mass concentration of caprolactam production wastewater could be stably reduced to below 20 mg/L by transforming the existing O tank to form a two-stage AO series process with carbon source. This study provides a support for advanced nitrogen removal of industrial high nitrogen wastewater.

关 键 词：己内酰胺 废水处理 脱氮 二级AO 反硝化 

分 类 号：X703[环境科学与工程—环境工程]