微量NO2对厌氧氨氧化甲烷化反硝化耦合影响的动力学分析

采用批试验方法，研究微量NO2对颗粒污泥厌氧氨氧化、甲烷化和反硝化耦合的影响。基于Haldane模型建立了厌氧氨氧化的NO2强化函数，估计了强化函数中的最大强化系数（30.55）、NO2半饱和常数（1.96 mg/L）、NO2抑制常数（0.0082 mg/L）和基础速率系数（0.0314）。微量NO2对甲烷化和反硝化动力学可用反竞争性抑制动力学方程进行描述。甲烷化的最大比乙酸盐去除速率为0.15 mg COD/（mg VSS·h），乙酸盐半饱和常数为395 mg COD/L，NO2抑制系数为0.623 mg/L。反硝化的亚硝酸盐氮最大去除速率0.00685 h-1，亚硝酸盐氮半饱和常数 0.214 mg/L，NO2抑制系数为22.4 mg/L。试验中大部分的NOx气体物质出现损失。

The kinetics analysis on effect of trace NO2 on integrating anaerobic ammonium oxidation, methanogenesis and denitrification

The effect of trace NO2 on integrating methanogenesis, denitrification and anaerobic ammonium oxidation was investigated by batch experiment. The function for NO2 apparently to enhance ammonium oxidation was suggested by the Haldane based model. The parameters were estimated, where the half saturate coefficient of NO2 was 1.96 mg/L, inhibition coefficient of NO2 was 0.0082 mg/L, the maximum enhanced rate coefficient was 30.55, the basic rate coefficient was 0.0314. The methanogenesis and denitrification kinetics could be described by uncompetitive inhibition model. The maximum NaAc removal rate, NaAc half saturation constant and NO2 inhibition coefficient in methanogenesis were 0.15 mg COD/（mg VSS·h）, 395 mg COD/L and 0.623 mg NO2/L respectively. The maximum nitrite removal rate, half saturation constant of NO-2-N and NO2 inhibition coefficient in denitrification were 0.00685 h-1, 0.214 mg NO-2-N /L and 22.4 mg NO2/L respectively. The most of NOx in the experiment was lossed.