人工湿地处理低污染水中硝氮的影响因素研究  

Research on influencing factors of nitrate removal from low-polluted water by constructed wetland

作　　者：代碧莹 张丹 高俊 兰书焕 李旭东[1,2] 谢翼飞 王臣[1,2] DAI Bi-ying;ZHANG Dan;GAO Jun;LAN Shu-huan;LI Xu-dong;XIE Yi-fei;WANG Chen(Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China;Environmental Microbiology Key Laboratory of Sichuan Province,Chengdu 610041,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院成都生物研究所,四川成都610041 [2]四川省环境微生物重点实验室,四川成都610041 [3]中国科学院大学,北京100049

出　　处：《应用化工》2022年第8期2319-2322,2326,共5页Applied Chemical Industry

基　　金：中国科学院战略生物资源服务网络计划“生物资源衍生库”项目(KFJ-BRP-009);甘肃省住房和城乡建设厅科研项目(JK2020-33);中国科学院战略生物资源能力建设项目(KFJ-BRP-017-59);四川省重点研发项目(2020YFS0021);四川省环境治理与生态保护重大科技专项(2019YFS0504)。

摘　　要：为探究低污染水中硝氮去除影响因素,以污水处理厂尾水为研究对象,构建水平潜流人工湿地,分析不同碳源添加量、水力负荷、温度及挂膜方式对硝氮去除效果的影响。研究表明,硝氮去除率与碳源添加量呈正相关,当投加30 mg/L COD_(cr)时硝氮去除率达到100%。另外,在投加30 mg/L COD_(cr)的常温条件下,水力负荷变化[0.51~1.28 m^(3)/(m^(2)·d)]对硝氮去除效果影响不大。而低温条件将会限制硝氮的去除,但通过人工挂膜的方式可提高湿地系统的抗寒能力,提升硝氮出水效果,最大水力负荷为0.77 m^(3)/(m^(2)·d)。由此获得的运行参数,可为处理低污染水中硝氮的工程应用提供理论依据和科学指导。In order to explore the factors affecting the removal of nitrate in low-polluted water,a horizontal subsurface flow constructed wetland was constructed with the tail water of a sewage treatment plant as the research object,and the removal effect of nitrate under different carbon source addition,hydraulic load,temperature and filming method was analyzed.Studies have shown that the nitrate removal rate is positively correlated with the amount of carbon source added.When 30 mg/L COD_(cr) is added,the nitrate removal rate reaches 100%.In addition,under normal temperature conditions where 30 mg/L CODcr is added,changes in hydraulic load[0.51~1.28 m^(3)/(m^(2)·d)]have little effect on the removal of nitrate nitrogen.Low temperature conditions will limit the removal of nitrate and nitrogen,but the artificial filming method can improve the cold resistance of the wetland system and enhance the effect of nitrate outflow.The maximum hydraulic load is 0.77 m^(3)/(m^(2)·d).The operating parameters thus obtained can provide theoretical basis and scientific guidance for the engineering application of nitrate treatment in low-polluted water.

关 键 词：低污染水 硝氮 水平潜流人工湿地 影响因素 

分 类 号：TQ085.4[化学工程] X[环境科学与工程]