针对曝气生物滤池工艺不具备脱氮除磷功能，特别是在处理工业综合废水时出水不能稳定达标排放的问题，提出了“化学除磷+气浮除油+水解酸化+前置反硝化曝气生物滤池”的全流程处理工艺，并通过中试研究对处理流程以及各个处理单元运行参数进行了优化，在水解酸化2.0 h，投加混凝剂硫化铁量为40.0 mg/L，气浮溶气压力3.5 kg/cm2，AO池125 %回流比，水力停留时间为20.0 min的条件下，其出水达到国家一级A排放标准的要求。并对升级改造的建设和运行费用进行了核算，为同类污水处理厂的升级改造工程提供理论依据和数据支持。

The wastewater treatment plant based on biological aerated filter faces the upgrading reconstruction to achieve the GB code first-level of wastewater discharge. Studies on the advanced treatment process involving chemical phosphorus removal, air-floated oil removal, hydrolysis acidification and the anoxic/oxic biological aerated filter were conducted, the feasibility of the process and the optimal parameters were determined. the feasibility of the process and the optimal parameters were determined. For pre-denitrification, the reflux ratio was 125 %, the hydraulic retention time was 20 min. The cost of construction and operation were calculated. The theoretical evidence and database can be used to the reference for the upgrading reconstruction of the similar wastewater treatment plant.