模块化移动床人工湿地脱氮效果及N_(2)O排放研究  

A Study on Nitrogen Removal Effect and N_(2O) Emission of Modular Moving Bed Constructed Wetland

作　　者：李子千 魏俊 胡丽萍 郭聪 孔令为 李凌 施文卿 LI Zi-qian;WEI Jun;HU Li-ping;GUO Cong;KONG Ling-wei;LI Ling;SHI Wen-qing(College of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing 21004,Jiangsu,China;Power China Huadong Engineering Corporation Limited,Hangzhou 311122,Zhejiang,China;Key Laboratory of Coastal Environment and Resources of Zhejiang Province,School of Engineering,Westlake University,Hangzhou 310030,Zhejiang,China;Westlake Ecological Environment(Hangzhou)Co.,Ltd.,Hangzhou 310030,Zhejiang,China)

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]西湖大学工学院,浙江省海岸带环境与资源研究重点实验室,浙江杭州310030 [4]西湖生态环境(杭州)有限公司,浙江杭州310030

出　　处：《湿地科学与管理》2024年第5期52-58,共7页Wetland Science & Management

基　　金：浙江省科技厅“领雁”计划项目(2023C03133);浙江省自然科学基金联合基金重点项目(LHZ22E090001)。

摘　　要：模块化移动床人工湿地(Modular Moving Bed Constructed Wetland,MMB-CW)因其去除效率高和抗堵塞等优势逐渐成为研究热点。本研究构建了轻质陶粒填充的MMB-CW,研究了不同填充度条件下MMB-CW的脱氮效果与N_(2)O的排放特征。结果表明:陶粒填充的MMB-CW具有良好的NH_(4)^(+)-N和NO_(3)^(-)-N去除效果,脱氮效果随陶粒填充度升高而增强(P<0.05)。在MMB-CW系统启动运行过程中,高陶粒填充度有利于促进硝化-反硝化耦合脱氮。当MMB-CW系统稳定时,100%填充度NH_(4)^(+)-N和NO_(3)^(-)-N的去除率分别为21.8%和43.7%,N_(2)O排放通量为0.6 mg/(m^(2)·d),与现有研究人工湿地N_(2)O排放通量相比处于较低水平。该研究为扩大MMB-CW技术的实际应用提供了一定的理论依据。Modular moving bed-constructed wetlands have emerged as a research hotspot due to its advantages such as high removal efficiency and anti-clogging.In this study,a lightweight ceramsite-filled MMB-CW was constructed,and the nitrogen removal effect and N_(2)O emission characteristics of the MMB-CW were investigated under different filling conditions.The results indicated that MMB-CW filled with ceramsite exhibited excellent removal efficiencies for NH_(4)^(+)-N and NO_(3)^(-)-N,with denitrification efficiency increasing as ceramsite filling extent increased (P<0.05).Throughout the startup operation of the MMB-CW system,the high ceramsite filling extent was conducive to the promotion of nitrificationdenitrification coupled nitrogen removal.Under stable conditions of the MMB-CW system,the removal rates of NH_(4)^(+)-N and NO_(3)^(-)-N were 21.8%and 43.7%,respectively,at 100%filling,with an N_(2)O emission flux of 0.6 mg/(m^(2)·d),presenting lower levels compared to existing research on N_(2)O emission flux in constructed wetlands.This study provides a theoretical basis for expanding the practical application of MMB-CW technology.

关 键 词：模块化移动床人工湿地 氧化亚氮排放 抗堵塞 脱氮效果 

分 类 号：X5[环境科学与工程—环境工程]