高浓度亚硝酸盐下产甲烷颗粒污泥反硝化动力学  

Denitrification Kinetics of Methanogenic Granular Sludge at High Nitrite Concentration

作　　者：刘茹[1] 宋英豪[2] 王焕升[2] 贾立敏[2] 林秀军[3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京化工大学环境工程学院,北京100029 [3]北京市环境保护科学研究院,北京100037

出　　处：《中国给水排水》2012年第19期19-23,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07209-003)

摘　　要：采用批式试验的方法研究了不同亚硝酸盐浓度下厌氧颗粒污泥的产气特性,并对颗粒污泥在高亚硝酸盐浓度下的反硝化动力学特性进行了分析。结果表明:①当厌氧颗粒污泥中只含有产甲烷菌时,加入NO2--N后,首先发生反硝化反应。当NO2--N浓度较低时对产甲烷菌的抑制作用较小,反硝化结束后会逐渐恢复产甲烷反应,浓度较高时则会完全抑制产甲烷反应。②高浓度的NO2--N对反硝化具有抑制作用,采用修正后的Monod模型描述了高浓度NO2--N对反硝化速率的影响,得到最大反硝化速率为2.394 mgNO2--N/(mgMLVSS·h),亚硝酸盐氮的半饱和常数为948 mg/L,亚硝酸盐氮抑制反硝化反应的抑制系数为0.003 08;当亚硝酸盐氮浓度>300mg/L时,会对反硝化反应造成抑制。The biogas production characteristics of anaerobic granular sludge at different nitrite concentrations were investigated by batch experiments, and the denitrification kinetics of the sludge at high nitrite concentration were analyzed. When the anaerobic granular sludge contained only methanogens, the denitrification occurred fight after adding nitrite. When a low concentration of nitrite inhibited methanogens slightly, the methanogenic reaction was gradually recovered after the completion of denitrification. Higher nitrite concentration inhibited the methanogenic reaction and denitrification. The effect of high nitrite concentration on denitrification was described using the modified Monod model. The maximum denitrification rate, half saturation constant of nitrite nitrogen and nitrite inhibition coefficient in denitrification were 2. 394 mgNO^-2-N/（mgMLVSS ·h）, 948 mg/L and 0. 003 08, respectively. Nitrite would inhibit denitrification when its concentration exceeded 300 mz/L.

关 键 词：高浓度亚硝酸盐 产甲烷颗粒污泥 反硝化动力学 

分 类 号：X703[环境科学与工程—环境工程]