低温SBR工艺活性污泥代谢特性研究

在(7±1)℃条件下,从污染物的去除效能、生物活性、污泥特性等方面,研究了低温SBR系统中活性污泥的代谢特性.结果表明:低温SBR系统在好氧阶段前40min能够将96%的COD去除,整个运行周期活性污泥对COD的代谢状况良好;由于低温的影响,活性污泥硝化反应过程受到抑制,反硝化过程无法正常进行;低温不是影响SBR反应器中聚磷菌P代谢过程的关键因素,在低温条件下聚磷菌对P的摄取、释放代谢状况良好;活性污泥2,3,5氯化三苯基四氮唑(TTC)和碘硝基四氮唑(INT)电子传递体系(ETS)活性呈现出周期性变化规律,TTC和INT-ETS活性能够有效表征整个运行过程活性污泥的代谢特性;稳定运行的低温SBR系统活性污泥表现出良好的沉降性,MLSS、MLVSS、以及MLVSS/MLSS都高于常温SBR系统.

Activated sludge metabolic features in low temperature sequencing bath reactor

The activated sludge metabolic features of a low temperature SBR system(7 1)℃ were studied for pollutant removal efficiency,bioactivity,and the sludge feature aspects.The low temperature SBR system removed 96% of COD within 40 minutes during the aerobic phase.The whole operation cycle was beneficial to COD degradation.The nitration process was restrained and the denitrifying process was unable to work normally due to the effect of low temperature.The low temperature was not the key factor that affected the phosphorus metabolic process of poly-P bacteria in the SBR reactor,as the poly-P bacteria could absorb and release the phosphorus normally in the low temperature environment.The TTC(2,3,5-triphenyl-tetrazolium chloride) and INT2-(p-indophenols)-3-(p-nitro phenyl)-5-phenyl-tetrazolium Chloride] Electron Transport System(ETS) activity can effectively characterize the operation of activated sludge metabolic properties.Sludge in the stable operated low-temperature SBR system showed good settling.MLSS,MLVSS and MLVSS/MLSS in the low temperature SBR system were higher than that in normal temperature SBR system.