某城市生活污水处理厂提标改造技术探讨

Discussion on up-grading technology of a municipal sewage treatment plant

近年来随着人们生活水平的不断提升,对环境保护的信念也越来越高,特别是地方行政主管部门针对污水处理排放标准日益严苛,使得先前已建造的老旧污水厂面临巨大挑战。以四川某城市生活污水处理厂提标改造工程为例,对改造老旧污水厂的思路及技术进行探讨,经工程验证,采用“粗细格栅及提升泵房+旋流沉砂池+超细格栅+A 2/O生化池+二沉池+高效沉淀池+反硝化生物滤池+紫外消毒渠”工艺可有效降低BOD 5,COD Cr,NH 3-N,TN,SS,TP等指标参数(其中,BOD 5为五日生化需氧量,COD Cr为化学需氧量,NH 3-N为氨氮,TN为总氮,SS为总悬浮颗粒物,TP为总磷)。

In recent years,with the continuous improvement of people’s living standards,people’s faith in environmental protection has become higher and higher.Especially for the increasingly stringent discharge standards of sewage treatment by local administrative departments,which makes the old sewage plants that have been built before face great challenges.In this paper,taking the upgrading project of a municipal sewage treatment plant in Sichuan Province as an example,the idea and technology of upgrading the old sewage treatment plant are discussed.Through the engineering verification,the process-coarse and fine grid and lifting pump room+whirling grit chamber+ultra-fine grid+A 2/O biochemical tank+secondary sedimentation tank+high efficiency sedimentation tank+denitrifying biological filter+UV disinfection channel,can effectively reduce BOD 5,COD Cr,NH 3-N,TN,SS,TP and other index parameters(BOD 5 is five-day biochemical oxygen demand,COD Cr is chemical oxygen demand,NH 3-N is ammonia nitrogen,TN is total nitrogen,SS is total suspended particles,TP is total phosphorus).