摘要：

接种稳定运行的UASB厌氧氨氧化反应器污泥至厌氧发酵罐进行批式实验,研究了进水HCO₃^-浓度对厌氧氨氧化反应的影响.结果表明,当进水HCO₃^-质量浓度 <0.8 g/L时,发酵罐出水pH迅速大幅度升高,抑制了厌氧氨氧化细菌活性,氮去除速率大幅下降;随着进水HCO₃^-质量浓度从0.8 g/L增加到1.2 g/L,厌氧氨氧化细菌的活性增加;进一步提高HCO₃^-浓度,氮去除速率下降,厌氧氨氧化细菌的活性又受到抑制.HCO₃^-对厌氧氨氧化反应的影响表现为提供充足碳源和调节反应器pH的综合作用.

关键词: 厌氧氨氧化, HCO₃^-浓度, pH, 氮去除速率

Abstract:

Batch experiments on the inoculation of the sludge in UASB ANAMMOX reactor that runs steadily to the fermentation tank have been conducted. The influences of influent HCO₃concentration on ANAMMOX reaction are investigated. The results show that when the mass concentration of influent HCO₃is less than 0.8 g/L,the effluent pH of the fermentation tank rise quickly to a great extent,inhibiting the bacterial activity of anaerobic ammonia oxidation,and making the nitrogen removing rate drop to a great extent. With the increase of the influent HCO₃mass concentration from 0.8 g/L to 1.2 g/L,the activity of anaerobic ammonia oxidation bacteria increases. When the concentration of HCO₃is raised further,the nitrogen removing rate decreases,and the activity of anaerobic ammonia oxidation bacteria is inhibited,again. It is concluded that the influences of HCO₃on the ANAMMOX reaction are to supply sufficient carbon source and regulate the reactor pH.

Key words: anaerobic ammonium oxidation(ANAMMOX), HCO₃concentration, pH, nitrogen removing rate

中图分类号: 

• X703