颗粒污泥厌氧氨氧化动力学特性及微量NO2的影响

采用批试验方法,研究了颗粒污泥厌氧氨氧化动力学特性及微量NO₂的影响.用Haldane模型描述厌氧氨氧化反应动力学,得到最大氨氮反应速率6.65×10^-3 mg·(mg·h)^-1、氨氮半饱和常数87.1 mg·L^-1和抑制常数1 123 mg·L^-1,亚硝态氮半饱和常数15.39 mg·L^-1和抑制常数159.5 mg·L^-1.微量NO₂对厌氧氨氧化具有强化作用,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48.79、NO₂半饱和常数2 480 mg·m^-3、NO₂抑制常数4.22 mg·m^-3和基础速率系数0.018 2.试验中大部分的NO_x出现损失.

Effect of Trace NO2 and Kinetic Characteristics for Anaerobic Ammonium Oxidation of Granular Sludge

The effect of trace NO₂ and kinetic characteristics for anaerobic ammonium oxidation of granular sludge was investigated by batch experiment. The sludge anammox rates could be described by the Haldane model. The kinetic parameters were determined, where the maximum anammox rate was 6.65×10^-3 mg·(mg·h)^-1. The half saturate coefficient and inhibition coefficient for ammonium nitrogen were 87.1 mg·L^-1and 1 123 mg·L^-1 respectively, and the half saturate coefficient and inhibition coefficient for nitrite nitrogen were 15.39 mg·L^-1 and 159.5 mg·L^-1 respectively. Trace NO₂ apparently enhanced anammox under trace NO₂ atmosphere conditions. The function for NO₂ to enhance anammox was suggested by the Haldane based model. The parameters in the function were estimated, where the maximum enhancing anammox coefficient was 48.79, and the half saturate coefficient and inhibition coefficient for NO₂ were 2 480 mg·m^-3 and 4.22 mg·m^-3 respectively, and the basic rate coefficient was 0.018 2. The most of NO_x in the experiment was lost.