城市生活污水SNAD生物膜脱氮特性

发布时间：2018-05-13 05:21

本文选题：SNAD生物膜 + 脱氮特性　；参考：《中国环境科学》2017年04期

【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.
[Abstract]:The denitrification properties of simultaneous nitrification, anaerobic ammonia oxidation and denitrifying SNAD biofilm were studied by batch test. SNAD biofilm had good anaerobic ammonia oxidation and denitrification activity. The removal rates of NH4 ~ -NCV-N and TINs were 0.121 ~ 0.180 ~ 0.267 kg N / kg VSS dl, respectively, while denitrification and nitrite oxidation activities were 0.211 ~ -0.053 kg NO_2~--N/(kg VSS d).SNAD biofilm with a suitable pH range of 5 ~ 9, respectively, and the biofilm was helpful to alleviate the pH value of anaerobic ammonia oxidation in anaerobic ammoxidation biofilm. The inhibitory effect of SNAD biofilm on NO_2~--N and FNA showed good tolerance. When the concentration of NO_2~--N is 100150mg/L, the corresponding FNA concentration is 70100ng / L, and the removal rate of NH4- N by anaerobic ammoxidation is 0.087 ~ 0.029kg N/(kg VSS DU, respectively. Scanning electron microscopy (SEM) showed that there were some short bacilli on the surface of SNAD biofilm. The main bacteria in SNAD biofilm are crater bacteria, which should be anaerobic ammonia-oxidizing bacteria.
【作者单位】：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;
【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)
【分类号】：X799.3

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