Application Study of Modified AAO and MBBR Combined Process in Emergency Treatment of Urban River Wastewater
Aiming at the problem of sewage overflow caused by Xinji River in Dongguan City during the rainy season or high water level of the sewage network,a modified AAO and MBBR combination process was applied.The combined process,using nitrifying liquid twice backflow,so as to achieve better nitrogen and phosphorus removal effect,COD,NH3-N,TP,SS average removal efficiency of 86.5％,93.5％,93.1％,92.4％.COD,NH3-N,TP effluent concentration is better than the Ⅵ class of surface water standards,SS effluent concentration steadily reached the urban wastewater treatment plant class A standards.It has the advantages of small footprint,stable and reliable water quality,high efficiency and energy saving,it effectively reduces the concentration of pollutants in river water and provides application experience for emergency treatment of river sewage.
modified AAO and MBBR combination processriver sewageemergency treatment
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