| 内容提要: |
Anaerobic ammonium oxidation (anammox) process has been paid close attention in wastewater treatment field because of its energy saving advantages. The lab-scale anammox biofilm reactors fed with different total nitrogen (TN) from 100 mg/L to 500 mg/L were operated for 120 days. The TN removal efficiency maintained around 80% at TN concentration in influent less than 400 mg/L, and then reduced to 66% when the concentration of TN increased to 500 mg/L. Microbial community analysis revealed that Candidatus_Brocadia and Candidatus_Kuenenia were the predominate anammox genus during the operation period. The abundance of Candidatus_Brocadia had an increase with the increased of influent TN concentrations, indicating that Candidatus_Brocadia could adapt to higher nitrogen concentration. |