『Abstract
　Biological nutrient removal (BNR) was investigated in a sequencing batch membrane bioreactor which used carriers instead of activated sludge named a sequencing batch moving bed membrane bioreactor (SBMBMBR). The SBMBMBR performed well on carbon and nitrogen removal at different COD/TN ratios. COD, TN and ammonium nitrogen removal efficiencies averaged at 93.5％, 82.6％ and 95.6％, respectively. The TP removal was closely correlated with the length of anaerobic phase and aerobic phase. When anaerobic time and aerobic time were both 2 h, the average TP removal efficiency reached to 84.1％ at influent TP concentration of 12.4 mg/L. DO in aerobic phase was an important factor affecting nutrient removal, and the optimal DO was about 3 mg/L. There was a small amount of denitrifying phosphorus accumulating organisms (DPAOs) in SBMBMBR which resulted from the anoxic microenvironment existed in the inner of the biofilm. Fluorescence in situ hybridization (FISH) results of microbes showed the composition and spatial structure of the microbial community in the reactor. Furthermore, sequencing batch mode operation was propitious to retard membrane fouling.

Keywords: Sequencing batch moving bed membrane bioreactor; Nitrogen removal; Phosphorus removal; Phosphorus accumulating organisms (PAOs); Specific phosphorus uptake rate test』

1. Introduction
2. Materials and methods
　2.1. Experimental set-up and operating conditions
　2.2. Analytical methods
　2.3. Fluorescence in situ hybridization
　2.4. Experimental procedures
　　2.4.1. General experiments
　　2.4.2. Cyclic studies
　　2.4.3. Batch experiments
3. Results and discussions
　3.1. Performance of the SBMBMBR
　　3.1.1. Organic substance and nitrogen removal
　　3.1.2. Phosphorus removal
　3.2. Effect of DO on nitrogen and phosphorus removal
　3.3. Cyclic studies of SBMBMBR
　3.4. Specific phosphorus uptake rate test
　3.5. The microbiological community and distribution in SBMBMBR
　3.6. Membrane fouling
4. Conclusion
References