中文摘要：

曝气生物滤池（BAF）是近年来受到广泛关注的一种新型污水处理技术,具有占地面积少、投资费用低、处理效率高、出水水质好等优点。现已被应用于许多污水处理厂的二级处理、深度处理以及污水的回用。实验以陶粒为填料,自行设计了升流式两阶段BAFs（UBAFs）处理模拟生活污水,考察了反应器运行条件对COD与氨氮去除影响,并探讨了UBAFs反应器内氮流失及同步硝化反硝化情况。结果表明,UBAFs对生活污水处理具有良好的净化效果。在进水COD和氨氮浓度分别为200-363 mg/L和16.8-31.3 mg/L条件下,UBAFs处理出水水质均达到《城市污水再生利用城市杂用水水质》（GB/T 18920-2002）标准,能够满足回用要求。通过采用氮平衡分析方法和借助电子扫描电镜技术,初步认为UBAFs反应器脱氮方式是由于在UBAFs第一阶段局部厌氧环境中以传统方式进行硝化反硝化脱氮,第二阶段是在好氧条件下,异养好氧硝化菌的同步硝化反硝化脱氮。

英文摘要：

Biological aerated filters（BAFs） have been paid close attentions due to its advantages of less land requirement,smaller footprint,and higher removal efficiency.They are used widely for secondary and advanced treatment as well as reuse of sewage in many wastewater treatment plants.In order to evaluate performances of up-flow two-stage BAFs（UBAFs） at bench-scale where ceramisite was packed as medium,a series of experiments were carried out with a synthetic sewage water mainly containing organic and ammonium as substrates,which included the effects of operation conditions on removal efficiencies of COD,ammonia,the nitrogen loss and simultaneous nitrification and denitrification performance in the UBAFs reactor.The results showed that performances of UBAFs for sewage treatment were pretty good.Effluent concentrations of both COD and ammonium met the requirememt in the Urban Miscellaneous Water Quality Standard of Urban Wastewater Reclamation and Reuse（GB/T 18920-2002） when the influent concentrations of COD and ammonia were 200-363 mg/L and 16.8-31.3 mg/L,respectively.Analysis of the nitrogen balance and electronic scanning electron microscopy techniques were used to investigate nitrogen removal in UBAFs.In the first stage of the UBAFs,anaerobic heterotrophic denitrification occurred where anoxic condition existed.In the second stage,aerobic heterotrophic de-nitrification was caused by heterotrophic nitrifying bacteria.