城镇污水厂尾水人工湿地生态组合系统处理效果研究

STUDY ON CONSTRUTED WETLAND ECOLOGICAL COMBINATION SYSTEM OF TREATMENT EFFECT IN URBAN SEWAGE PLANT

以北京市安南湿地为研究对象,采用“前置塘+复合潜流湿地+表流湿地”人工湿地生态组合系统净化城镇污水厂尾水,阐述了人工湿地生态组合系统的布置和设计基本情况,采用水质监测、植物长势等方式,对其2022年1—6月运行效果进行分析和评估。结果表明:城镇污水处理厂尾水执行北京DB 11890—2012《城镇污水处理厂水污染物排放标准》B标准的微污染水经人工湿地生态组合系统净化后,NH_(3)-N、TP和COD均可达到地表水Ⅲ类水质标准,效果理想。监测数据结果也表明,填料“陶粒+沸石+火山岩+石灰石+碎石”组合对有机物、氮磷的净化能力较好,工程应用中可以借鉴。人工湿地生态组合系统在城镇污水厂尾水处理中形成了可循环的生态系统,达到物种共生的功能。研究结果能够为城镇污水处理厂尾水生态处理技术提供数据支撑和理论基础,为以后湿地生态系统的推广和示范研究提供直接的理论依据和实践经验。

This article takes the Annan wetland of Beijing as the research object,using the"front pond+composite underwater wetland+surface flow wetland"of artificial wetland ecological combination system purifies tail water of urban sewage plant,This article expounds the basic situation of the artificial wetland ecological combination system layout and design,adopts the methods of water quality monitoring,plantngrowth assessment,and analyzes and evaluates the running affect from January to June 2022.The results showed that the slightly polluted water of the tailwater of the urban sewage treatment plant was purified by the constructed wetland ecological combination system,the tailwater of the urban sewage treatment plant performs the class B of Discharge Standards for Water Pollutants from Urban Sewage Treatment Plants(DB11890-2012),the effluent concentration of NH_(3)-N,TP and COD cr could reach the classⅲof surface water quality standard,and the effect was ideal.The results of monitoring data also show that the combination of filling"ceramsite+zeolite+volcanic rock+limestone+gravel"has a good purification ability of organic matter,nitrogen and phosphorus,which can be used for reference in engineering application.The constructed wetland ecological combination system forms a recyclable ecosystem in the treatment of the tail water of the urban sewage plant and achieved the function of species symbiosis.The research results can provide data support and theoretical basis for the ecological treatment technology in tailwater of urban sewage treatment plants,and provide direct theoretical basis and practical experience for the promotion and demonstration of wetland ecosystem in the future.