关键词: 城市污水, 环境工程, 序枇式生物膜反应器, 生物除磷

Abstract:

In the biofilm reactor with continuous flow,the removal eficiency of phosphorus is very low,while those of organics and nitrogen are very high.In order to solve these problems,an alternating anaerobic/aerobic sequen-cing-batch biofilm reactor(SBBR)was built up.By reasonably controlling the anaerobic and aerobic time,the municipal wastewater in Guangzhou with low carbon content was then treated,and the eficiency and characteristics of phosphorus removal were investigated.The results show that the mass concentration of total phosphorus(TP)in the effluent reaches 0.085~0.5 mg/L at a influent TP content of 1.65~7.10ms/L.and that the removal rate reaches more than 90% .Moreover.by the further analyses of the characteristics and controlling factors of anaerobic and aerobic phases in SBBR,it is concluded that the alternating anaerobic/aerobic process is the prerequisite of effective phosphorus removal,that the maximum valid amount of released anaerobic phosphorus is key to the efficiently removal of phosphorus in SBBR due to the good correlation among the valid phosphorus release,the organic removal and the phosphorous removal eficiency.

Key words: municipal wastewater, environmental engineering, sequencing-batch biofilm reactor, biological phos-phorus removal