城市生活污水SNAD生物膜脱氮特性  

Nitrogen removal performance of SNAD biofilm cultured by domestic wastewater

作　　者：郑照明[1] 李军[1] 侯爱月 马静[1] 杜佳[1] 赵白航[1] 杨京月 ZHENG Zhao-ming;LI Jun;HOU Ai-yue;MA Jing;DU Jia;ZHAO Bai-hang;YANG Jing-yue(National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China)

机构地区：[1]北京工业大学国家工程实验室,北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京100124

出　　处：《中国环境科学》2017年第4期1322-1330,共9页China Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2014ZX 07201-011);国家自然科学基金青年基金(51308010);教育部博士点新教师(20131103120017);北京市博士后工作经费资助项目(2015ZZ-10)

摘　　要：通过批试实验研究了同步亚硝化、厌氧氨氧化和反硝化(SNAD)生物膜的脱氮性能.SNAD生物膜具有良好的厌氧氨氧化和反硝化活性.厌氧氨氧化NH_4^+-N、NCV-N和总无机氮(TIN)去除速率分别为0.121,0.180,0.267kgN/(kgVSS·d);反硝化和亚硝态氮氧化活性分别为0.211,0.053kg NO_2^--N/(kg VSS·d).SNAD生物膜厌氧氨氧化适宜的pH值范围为5~9,生物膜有助于缓解pH值对厌氧氨氧化菌的抑制作用.SNAD生物膜对NO_2^--N和FNA的抑制作用表现出良好的耐受能力.当NO_2^--N浓度分别为100,150mg/L时,对应的FNA浓度分别为70,100ng/L,厌氧氨氧化NH_4^+-N去除速率分别为0.087,0.029kg N/(kg VSS·d).扫描电镜显示,在SNAD生物膜表面主要是一些短杆菌.在SNAD生物膜内部主要为火山口状细菌,应为厌氧氨氧化菌.The nitrogen removal performance of simultaneous partial nitrification,anaerobic ammonium oxidization and denitrification(SNAD)biofilm was investigated in batch tests.The SNAD biofilm performed good anammox and denitrification activities.The NH4+-N,NO2--N and total inorganic nitrogen(TIN)removal rates of anammox activity were0.121,0.180and0.267kg N/(kg VSS·d),respectively.The denitrification and nitrite oxidation activities were0.211and0.053kg NO2--N/(kg VSS·d),respectively.The suitable pH ranges for anammox activity were5.0to9.0.The the inhibition effect of pH on the anammox bacteria could be largely relieved by biofilm.Besides,the SNAD biofilm was found to perform high tolerance to the inhibition of NO2--N and free nitrous acid(FNA).The NH4+-N removal rates for anammox process were0.087and0.029kg N/(kg VSS·d)with the NO2--N concentrations of100mg/L(FNA concentration of70μg/L)and150mg/L(FNA concentration of100μg/L),respectively.The SEM observations indicated that the bacteria in the outer part of the SNAD biofilm were mainly short rod-shaped.In the inner part of the SNAD biofilm,the bacteria were mainly crater-shaped,which should be anammox bacteria.

关 键 词：SNAD生物膜 脱氮特性 厌氧氨氧化 亚硝态氮 pH值影响 

分 类 号：X703.5[环境科学与工程—环境工程]