| The difference of SBBR performance and nitrogen transformation mechanism which caused by four different influent patterns was researched in this paper. Through variance analysis of SBBR performance, microbial community structure and nitrogen transformation, the results indicated that, on the one hand the dispersed influent pattern displayed higher anti-load ability than the centralized one, under the same efficiency, COD and ammonia load of the dispersed M4 reached 2,540 mg.L-1.d-1 and 540 mg.L-1.d-1 respectively compared with 2,000 mg.L-1.d-1 and 420 mg.L-1.d-1 by the centralized M1; on the other hand, considering the dispersed influent pattern, the closer influent mood was to the cycle mood of operation, the higher the nitrogen transformation efficiency was, which finally led residual nitrogen concentration declined. |
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