内蒙古某污水厂一级A提标改造工程设计及运行

Design and Operation of Class A Upgrading and Reconstruction Project of a Sewage Plant in Inner Mongolia

我国北方冬季因气温较低,往往造成污水处理厂除氮效果不佳,出水水质较差,仅能达到一级B标准。为提升污水处理能力,实现水资源的可持续发展,需要对原污水处理厂进行提标改造。以内蒙古某污水处理厂为例,综合考虑其原水进水中化学需氧量(COD)、悬浮物(SS)指标高,以及冬季屠宰废水流量剧增等因素,选用"A/A/O-MBBR+高效沉淀池+连续砂滤池"的工艺对污水厂进行改造;投入使用后,污水处理厂运行良好,脱氮除磷及降低SS效果明显,出水水质达到一级A标准,年节约费用220余万元。

Due to the low temperature in winter in northern China,the nitrogen removal effect of sewage treatment plant is often poor,and the effluent quality is poor,which can only reach the first level B standard.Taking a sewage treatment plant in Inner Mongolia as an example,the process of"A/A/o-MBBR+high efficiency sedimentation tank+continuous sand filter"is selected to reconstruct the sewage treatment plant considering the high COD and SS indexes in the raw water inflow and the sharp increase of the flow of slaughterhouse wastewater in winter.After being put into use,the sewage treatment plant is in good operation with obvious effects of denitrification,phosphorus removal and SS reduction.The effluent quality reaches grade A standard,and the annual cost is saved more than 2.2 million yuan.