不同碳源添加量对地表流人工湿地污水脱氮效果影响  

Effect of Different Carbon Source Additives on Nitrogen Removal Efficiency of Surface Flow Artificial Wetland Wastewater

作　　者：黄鑫 谭佩阳 侯志勇[1] 谢永宏[1] 于晓英[2] 李阳 HUANG Xin;TAN Peiyang;HOU Zhiyong;XIE Yonghong;YU Xiaoying;LI Yang(Key Laboratory of Agroecological Processes,Institute of Subtropical Agroecology,Chinese Academy of Sciences,Dongting Lake Wetland Ecosystem Observation and Research Station,Chinese Academy of Sciences,410125;School of Horticulture,Hunan Agricultural University,410128;Hunan Kaidi Engineering Technology Co.,Ltd.,Changsha,China 410004)

机构地区：[1]中国科学院亚热带农业生态研究所农业生态过程重点实验室,中国科学院洞庭湖湿地生态系统观测研究站,湖南长沙410125 [2]湖南农业大学园艺学院,湖南长沙410128 [3]湖南凯迪工程科技有限公司,湖南长沙410004

出　　处：《水处理技术》2025年第1期102-107,共6页Technology of Water Treatment

基　　金：湖南省-国家自然科学基金委区域创新发展联合基金(u19A2051);湖南省科技创新平台计划(2022PT1010);国家自然科学基金项目(41601106);湖南省自然基金项目(2017JJ3374)。

摘　　要：为强化人工湿地的脱氮效能,本研究以地表流人工湿地系统作为对象,试验选取南荻、美人蕉和玉米芯作为外加碳源脱氮材料,探讨在相同进水浓度下各碳源材料为1、1.5、2 g/L时对系统脱氮效果的影响。试验结果显示:三组脱氮材料实验组去除NO3--N的效率显著高于对照组,系统运行前期实验组NO_(3)^(-)-N平均去除率高达99.5%;实验组系统出水有机碳,铵态氮,硝态氮和总氮的各浓度均低于其进水浓度,并没有造成水质恶化的现象,且在平稳期实验组总氮浓度显著低于对照组,可见三种植物可以作为外加碳源脱氮材料;1、1、1.5 g/L分别为南荻、美人蕉、玉米芯的最适添加量,污水中TN浓度分别降到(4.50±0.10)、(3.75±0.29)、(2.28±0.27)mg/L,TN去除率分别可达到64.0%、70.0%、81.8%,适量添加湿地植物碳源,有利于提高地表流人工湿地脱氮效率。In order to enhance the denitrification efficiency of artificial wetlands,this study takes the surface flow artificial wetland system as the object,and selects Triarrhena lutarioripari,Canna indica,and Corn cobs as external carbon source denitrification materials.The study explores the impact of different carbon source materials at 1,1.5 and 2 g/L under the same influent concentration on the denitrification efficiency of the system.The experimental results showed that the efficiency of removing NO_(3)^(-)-N in the experimental group of three denitrification materials was significantly higher than that in the control group.In the early stage of system operation,the average removal rate of NO3--N in the experimental group was as high as 99.5%;The concentrations of organic carbon,ammonium nitrogen,nitrate nitrogen,and total nitrogen in the effluent of the experimental group were all lower than their influent concentrations,and there was no deterioration in water quality.Moreover,during the stable period,the total nitrogen concentration in the experimental group was significantly lower than that in the control group,indicating that the three plants can be used as external carbon source denitrification materials.1,1 and 1.5 g/L were the optimal addition amounts for T.lutarioripari,C.indica,and C.cobs,respectively.The TN concentration in wastewater was reduced to(4.50±0.10),(3.75±0.29)and(2.28±0.27)mg/L,respectively.The TN removal rates could reach 64.0%,70.0%,and 81.8%,respectively.Adding appropriate amounts of wetland plant carbon sources is beneficial for improving the nitrogen removal efficiency of surface flow constructed wetlands.

关 键 词：地表流人工湿地 外加碳源 碳源添加量 脱氮 

分 类 号：X703.1[环境科学与工程—环境工程]