Abstract
KEYWORD: sequencing batch biofilm reactor (SBBR); aeration amount; simultaneous nitrification and denitrification (SND) ABSTRACT: A pilot scale sequencing batch biofilm reactor (SBBR) for treating wastewater was used for the purpose of investigating treatment performance under different aeration flows(10m3/h 、 12m3/h、14m3/h、16m3/h、18m3/h、20m3/h、22m3/h、24m3/h),by analyzing the changeable concentration of COD、NH4+-N、NH3--N NH2--N and TN both influent and effluent. To find the optimum condition of aeration, provide a reference for practical engineering application. The exper- imental results showed that, the amount of aeration have less effect on COD removal efficiency but on nitrogen removal. The SBBR could achieve a higher degree of SND, and TN removal could maintain around 62% , the quality of effluent meet level 1B standard of 《Discharge standard of pollutants for municipal wastewater treatment plant 》When the aeration flow was controlled the range of 16~18mg/L.
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