芦苇碳源水平潜流人工湿地强化农田退水脱氮效能研究  

Nitrogen removal of Phragmites Australis packed horizontal surface flow constructed wetland for agricultural runoff treatment

作　　者：常洋[1,2] 王文富 王冠峰 闫国凯 王欢 董伟羊 王海燕[1] 储昭升[2] CHANG Yang;WANG Wenfu;WANG Guanfeng;YAN Guokai;WANG Huan;DONG Weiyang;WANG Haiyan;CHU Zhaosheng(Research Center for Water Pollution Control Technology,Chinese Research Academy of Environmental Sciences,Beijing 100012;State Environmental Protection Key Laboratory for Lake Pollution Control,National Engineering Laboratory for Lake Pollution Control and Ecological Restoration,Chinese Research Academy of Environmental Sciences,Beijing 100012;Bureau of Ecology and Environment of Zhumadian City,Zhumadian 463000;Sanmenxia Institute of City Planning and Exploring,Sanmenxia 472000)

机构地区：[1]中国环境科学研究院环境污染控制工程技术研究中心,北京100012 [2]中国环境科学研究院,国家环境保护湖泊污染控制重点实验室,湖泊水污染治理与生态修复技术国家工程实验室,北京100012 [3]驻马店市生态环境局,驻马店463000 [4]三门峡市规划勘测设计院,三门峡472000

出　　处：《环境科学学报》2024年第1期275-282,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.52170173);国家水体污染控制与治理科技重大专项(No.2012ZX07105-002)。

摘　　要：以洱海地区硝酸盐占比高、C/N比低的农田退水为处理对象,将经济易得的芦苇(Phragmites Australis)碎段投加于水平潜流湿地(Horizontal Subsurface Flow Construction Wetland,HSFW)构建PHSFW湿地,并研究其对模拟农田退水中氮的强化去除效能.结果表明:①投加芦苇碎段的PHSFW湿地的启动速度及脱氮效能优于未投加芦苇的PHSFW_(0)湿地,在工况1(进水TN为(18.2±1.6)mg·L^(-1)、HRT=3 d、第29~41 d)和工况2(进水TN为(17.6±0.7)mg·L^(-1)、HRT=2d、第42~81 d)条件下PHSFW的TN平均去除率分别为77.0%±9.0%和68.9%±7.0%,与PHSFW_(0)相比分别提高了56.0%和50.3%;②在工况4(进水TN为(16.7±0.7)mg·L^(-1)、HRT=3 d、第130~149 d)条件下,PHSFW脱氮效能最高,其出水TN可满足《地表水环境质量标准》(GB 3838-2002)Ⅳ类水标准;③PHSFW在工况1出现了较为明显的TP、COD_(Mn)、NH_(4)^(+)-N和NO_(2)^(-)-N积累情况,运行稳定后在工况4条件下,出水COD_(Mn)、NH_(4)^(+)-N、NO_(2)^(-)-N浓度可满足地表水Ⅲ类水标准.PHSFW具有优异的脱氮效能,但仍应采取相关措施以避免湿地运行初期阶段出水COD_(Mn)、NH_(4)^(+)-N、NO_(2)^(-)-N和TP的积累.To treat the low carbon/nitrogen(C/N)ratio and high nitrate proportion agricultural runoff of Erhai Lake region,the economical and easily obtained Phragmites Australis pieces were supplied as external carbon source,which were packed into the horizontal subsurface flow constructed wetland(HSFW),and the enhanced nitrogen removal efficiency was extensively investigated.The results were as follows:①Both of the startup speed and nitrogen removal efficiency of the HSFW packed with Phragmites Australis(PHSFW)were remarkably higher than those of the control HSFW(PHSFW_(0)),i.e.without Phragmites Australis addition.Under operation condition I((18.2±1.6)mg·L^(-1)influent TN,3 d HRT,29~41 d period)and II((17.6±0.7)mg·L^(-1)influent TN,2 d HRT,42~81 d period),the average TN removal of PHSFW were 77.0%±9.0%and 68.9%±7.0%,which were 56.0%and 50.3%higher than those of HSFW0.②Under operation condition IV((16.7±0.7)mg·L^(-1)influent TN,3 d HRT,130~149 d period),the nitrogen removal of PHSFW was the highest,and the effluent TN could meet the Class IV standard of Environmental Quality Standards for Surface Water(GB 3838-2002)in China.③Significant TP,COD_(Mn),NH_(4)^(+)-N,and NO_(2)^(-)-N accumulation was occurred during operation condition I period.Under the operation condition IV,i.e.the stable period of PHSFW,the effluent COD_(Mn),NH_(4)^(+)-N,and NO_(2)^(-)-N could meet the Class III standard of Environmental Quality Standards for Surface Water(GB 3838-2002)in China.PHSFW has excellent nitrogen removal performance.However,certain measures should be taken to avoid the accumulation of COD_(Mn),NH_(4)^(+)-N,and NO_(2)^(-)-N in the effluent during operation condition I period.

关 键 词：水平潜流人工湿地 芦苇碳源 强化脱氮 低碳氮比农田退水 效能 

分 类 号：X703[环境科学与工程—环境工程]