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This paper study on the SBBR (Sequencing Batch Biofilm Reactor) and the SBR(Sequencing Batch Reactor Activated Sludge Process), discussing about the physical properties and biological natures of the biomembrane and the CODcr’s, NH4+-N’s removal efficiency of the two reactors in the domesticated process, the experimental results indicates that when the HRT is 12h, aeration is 150L/h, the value of PH is between 7.2 and 7.5, the temperature is 25℃, although the concentration of the suspended sludge in the SBBR reactor is lower than those in the SBR, the biomass liveweights are much higher than those in the SBR’s. The SBBR has a higher pollutant retention efficiency and a better adaptation about to the changing of the feed water’s quality and other adverse environmental conditions. When the sludge are domesticated maturely, the concentration of the feed water’s COD and the NH4+-N are 2100mg/l and 525mg/l respectively,the SBBR’s removal rate about the two factors are 94% and 90.2% respectively, the SBR’s are 93% and 86.1%.On the bases of the study, through changing the aeration of the SBBR system to achieve simultaneous nitrification denitrification of this technic, through changing parameters of DO,the value of PH, temperature and C/N in the reactor to investigate the experiment’s effects, and earn the best control area of each parameter. We can get the following conclusions from the experiment:The method of SBBR has a good removal efficiency in COD, at the condition of different value of PH,the concentration of DO, temperature and the value of C/T, the removal rate of COD are higher than 80%, this indicates that the biological membrane has a better ability in adapting external environment. This experiment confirms the best technological parameters of the simultaneous nitrification denitrification denitrifying technic:the value of PH is 7.5, the optimum temperature is 28℃, the concentration of DO is 2-4 mg/l,the best value of C/N is 4.5. Using the process of SBBR, the concentration of COD in the feed water is kept to 2100mg/l, the concentration of NH4+-N is between 300mg/l and 900mg/l, the system can get a better water quality of effluent, the removal rate of NH4+-N are all higher than 90%, the removal rate of TN are all higher than 70%,the accommodation range of C/N is very broad. The best parameters of this experiment are as follows, the value of feed water’s PH is 7.5,the value of DO is between 2mg/l and 4mg/l, the HRT is 12h,the temperature is 28℃,besides the feed water’s concentration of CODcr is 2100mg/l and ammonia nitrogen is 500mg/l, the effluent water’s concentration of CODcr, ammonia nitrogen and TN are 110mg/L,5mg/L,58mg/l respectively, the removal rates are 94.7%,98.8%,90.2% respectively,the removal rates are all high, and exam the reliability of the optimal condition.
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