| 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 operational temperature of anammox system was one of the obstacles to its full-scale application. The lab-scale anammox biofilm reactors fed with influent total nitrogen (TN) of 100 mg/L were operated for 110 days with the temperature declined from 36 ℃ to 15 ℃. The TN removal efficiency reduced from 80% to 66% when the temperature declined from 36 ℃ to 15 ℃. However, the concentration of quorum sensing molecular showed a decrease from 36 ℃ to 15 ℃ both in water and biomass phase, especially for C6-HSL and C8-HSL. Microbial community analysis revealed that Candidatus_Kuenenia was the predominate anammox genus during the operation period. The abundance of anammox bacteria increased in continuity even in the ambient and low temperature. Results from this study indicated that the ambient and low temperature reduced the bacteria communication through quorum sensing system. |