外置除磷设备在农村生活污水处理站改造中的应用

Application of External Phosphorus Removal Equipment in the Transformation of Rural Domestic Sewage Treatment Plant

某农村生活污水处理站建设规模为500m^(3)/d,主体工艺为“A^(2)/O”,由于缺少合理的除磷工艺段,出水TP无法达标。增加外置除磷设备后,处理后的污水水质稳定达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级B标准后排放。本文介绍了外置除磷设备的设计参数、药剂选择、运行效果及运维管理模式,为同类农村地区生活污水处理站提标改造提供参考。

The total scale of a rural domestic sewage treatment plant is 500 m^(3)/d,and the main process is“A^(2)/O”.Due to the lack of suitable phosphorus removal process section,the effluent TP cannot met the standard.After the addition of external phosphorus removal equipment,the treated sewage will be discharged after the water quality met the first level B standard in the“Urban Wastewater Treatment Plant Pollutant Discharge Standard(GB18918-2002)”.This paper introduces the process design parameters,coagulant selection,operation effect and operation management model of external phosphorus removal equipment,which can be used as reference for the upgrading and reconstruction of domestic sewage treatment stations in similar rural areas.