SNAD生物膜厌氧氨氧化活性的氨氮抑制动力学研究

发布时间：2018-05-28 13:30

本文选题：SNAD生物膜 + 厌氧氨氧化　；参考：《中国环境科学》2016年10期

【摘要】：通过批试实验研究了氨氮浓度对SNAD生物膜厌氧氨氧化性能的影响.SNAD生物膜反应器以生活污水为进水.进水NH_4~+-N和COD浓度平均值分别为70mg/L和180mg/L,出水NH_4~+-N,NO_2~--N,NO_3~--N和COD浓度平均值分别为2mg/L,2mg/L,7mg/L和50mg/L.SNAD生物膜具有良好的厌氧氨氧化活性.初始NH_4~+-N和NO_2~--N浓度都为70mg/L时,厌氧氨氧化批试NH_4~+-N、NO_2~--N和TIN去除速率分别为0.121kg N/(kg VSS·d),0.180kg N/(kg VSS·d)和0.267kg N/(kg VSS·d).采用Haldane模型可以很好的拟合氨氮浓度对厌氧氨氧化活性的影响.在高FA和低FA工况下氨氮浓度对厌氧氨氧化活性的抑制动力学常数相差不大.M1(FA浓度为0.7~20.4mg/L)和M2(FA浓度为6.3~190.5mg/L)的最大NO_2~--N理论去除速率r_(max)分别为0.209kg N/(kg VSS·d)和0.221kg N/(kg VSS·d),氨氮半饱和常数Ks分别为9.5mg/L和6.1mg/L,氨氮自身抑制常数KI分别为422mg/L和597mg/L.氨氮(而不是游离氨)对SNAD生物膜的厌氧氨氧化活性起主要抑制作用.
[Abstract]:The effect of ammonia concentration on anaerobic ammonia oxidation performance of SNAD biofilm was studied by batch test. The wastewater was used as influent in SNAD biofilm reactor. The average concentration of NH _ 4 ~ -N and COD were 70mg/L and 180 mg / L, respectively. The average concentration of NH _ 4 ~ -N ~ -N and COD was 2 mg / L ~ 2 mg / L and 7 mg / L 50mg/L.SNAD biofilm respectively, and the effluent NH _ 4 ~ -N ~ -N and 50mg/L.SNAD biofilm had good anaerobic ammonia oxidation activity. When the initial NH4 ~ -N and NO_2~--N concentrations were 70mg/L, the removal rates of N and TIN were 0.180 kg N/(kg VSS / d and 0.180 kg / N/(kg VSS / d, respectively. The effect of ammonia concentration on anaerobic ammonia oxidation activity can be well fitted by Haldane model. The inhibitory kinetic constants of ammonia nitrogen concentration on anaerobic ammonia oxidation activity under high FA and low FA conditions were not different. The maximum theoretical NO_2~--N removal rates of 0.7 ~ 20.4 mg / L and 6.3 ~ 190.5 mg / L of M2(FA were 0.209kg N/(kg VSS _ d and 0.221kg N/(kg VSS _ d, respectively. The constant Ks is 9.5mg/L and 6.1 mg / L, and the ammonia nitrogen self-inhibition constant Ki is 422mg/L and 597 mg / L, respectively. Ammonia nitrogen (rather than free ammonia) mainly inhibits the anaerobic ammonia oxidation activity of SNAD biofilm.
【作者单位】：北京工业大学建筑工程学院;
【基金】：国家水体污染控制与治理科技重大专项(2014ZX 07201-011) 16人才培养质量建设-双培养计划新兴专业建设(004000542216031) 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】：X703

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