人工湿地对污水厂尾水强化脱氮处理的改进设计  

Improved Design of Artificial Wetland for Enhanced Denitrification Treatment of Wastewater Treatment Plant Tail Water

作　　者：王自业 WANG Ziye(Beijing China Railway Ecological&Environment Design Institute Co.,Ltd.,Beijing 102600,China)

机构地区：[1]北京中铁生态环境设计院有限公司,北京102600

出　　处：《供水技术》2023年第3期29-33,共5页Water Technology

摘　　要：针对污水厂尾水碳氮比低,TN含量高、难去除的问题,设计开发了以复合垂直流人工湿地为主,辅以生态塘-表流湿地的组合人工湿地系统,通过研究人工湿地脱氮机理及其影响因素,提出采用外加碳源来提高碳氮比,并利用上行垂直流人工湿地单元的缺氧环境进行脱氮。本设计根据大量研究和工程实例所总结的优秀经验,规模化应用人工湿地的先进工艺到实际工程中,实现污水厂尾水由地表水环境质量Ⅴ类提高至Ⅳ类,并大幅削减TN。In response to the problems of low carbon to nitrogen ratio,high TN content,and difficulty in removal in the tail water of sewage treatment plants,a composite vertical flow constructed wetland system was designed and developed,mainly supplemented by ecological ponds and surface flow wetlands.By studying the denitrification mechanism and influencing factors of the constructed wetland,it was proposed to use an external carbon source to improve the carbon to nitrogen ratio,and to use the anaerobic environment of the upstream vertical flow constructed wetland unit for denitrification.Based on the excellent experience summarized from a large number of research and engineering examples,this design applies the advanced technology of artificial wetlands on a large-scale basis to practical projects,achieving the improvement of the tail water quality of sewage treatment plants from ClassⅤto ClassⅣ,and significantly reducing TN.

关 键 词：污水厂出水 复合垂直流 人工湿地 碳源 脱氮 

分 类 号：TU992.3[建筑科学—市政工程]