Nitrogen removal from summer to winter in a field pilot-scale multistage constructed wetland-pond system

作     者：Tao Wang Liping Xiao Hongbin Lu Shaoyong Lu Jiaxin Li Xiaochun Guo Xiaoliang Zhao Tao Wang;Liping Xiao;Hongbin Lu;Shaoyong Lu;Jiaxin Li;Xiaochun Guo;Xiaoliang Zhao

作者机构：National Engineering Laboratory for Lake Pollution Control and Ecological RestorationState Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu(SEPSORSLD)State Environmental Protection Key Laboratory for Lake Pollution ControlState Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of Environmental SciencesBeijing 100012China School of Environmental and Municipal EngineeringQingdao University of TechnologyQingdao 266033China College of Environmental Science and EngineeringLiaoning Technical UniversityFuxin 123000China College of Water SciencesBeijing Normal UniversityBeying 100875China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2022年第34卷第1期

页      面：249-262页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：supported bythe Ministry of Science and Technology of China(No.2015FY110900) the National Natural Science Foundation of China(No.41877409) the Major Science and Technology Program for Water Pollution Control and Treatment of China(No.2018ZX07208008) 

主　　题：Multistage constructed wetland-pond Total nitrogen Air temperature change Emergent plants Polluted surface water 

摘      要：A pilot-scale multistage constructed wetland-pond(MCWP)system with apre-ecological oxidation pond,two-stage horizontal subsurface flow constructed wetland(HSCW)and surface flow constructed wetland(SFCW)as the core and postsubmerged plant pondas the process was used to treat actual polluted river water in the field,and the variation in nitrogen removal from summer to winter was *** results showed that the average total nitrogen(TN)removal efficiency in the MCWP was approximately 40.74%.The significant positive correlation between the daily highest temperature and the TN removal efficiency of the whole system was fitted with a nonlinear curve(R^(2)=0.7192).The TN removal load rate in the HSCWs was 2.7–3.7 times that in the *** SFCW,which had high-density plants(35 plants/m^(2)),increased the proportion of nitrogen removed by plant harvesting and microbial *** TN transformed by Iris pseudacorus *** for 54.53%in the ***,bacteria completed the nitrogen cycle in the SFCW through a variety of nitrogen removal *** research not only investigated the TN removal performance in an MCWP system but also made it possible to predict the TN removal efficiency according to the daily highest temperature from summer to winter in the field.