高浓度氨氮对IC厌氧反应器运行的抑制性研究
Effect of ammonium on operation of internal circulation reactor
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摘要: 在中温（35±1）℃条件下，以葡萄糖为有机碳源，研究氨氮对IC厌氧反应器运行的影响。实验结果表明，氨氮浓度超过3 036 mg/L时对反应器的运行有抑制作用，随着氨氮浓度的增加，抑制作用更加明显，氨氮对系统的IC50为4 500 mg/L；系统运行过程中VFA低于400 mg/L，pH值和碱度分别维持在7.21～7.62之间和2 356～3 065 mg/L之间；反应器对氨氮的平均去除率为12.67％。在毒性恢复实验中，7 d后COD去除率恢复到93.01％；恢复期系统VFA逐渐降低，从第6 d开始维持在152～162 mg/L之间；出水碱度和pH值维持在1 769～2 298 mg/L和7.09～7.27之间，系统运行稳定。Abstract: The effect of ammonium on the running of internal circulation reactor was studied taking glucose as organic carbon source under mesophilic conditions(35±1)℃.The experimental results showed that when the concentration of ammonium was higher than 3 036 mg/L, the running of IC reactor was inhibited, the corresponding IC50 was 4 500 mg/L, and the effect of inhibition became evident with the concentration of ammonium increasing. During the whole operation, VFA of effluent was lower than 400 mg/L, pH and alkalinity were stabilized at 7.21～7.62, 2 356～3 065 mg/L, respectively. The average removal rate of ammonium was 12.67％. In the toxicity recovery experiment, the removal rate of COD was recuperated to 93.01% after 7 days, and during the period of recuperation, the VFA of system was gradually reduced and stabilized at 152～162 mg/L from the sixth day, the alkalinity and pH were also stabilized at 1 769～2 298 mg/L, 7.09～7.27, respectively. The whole system run stably.
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Key words:
- ammonium /
- internal circulation reactor /
- operation characteristic
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