【摘要】 AOA工艺在处理低C/N城市污水时可实现深度脱氮。对用地紧张的污水处理厂，在AOA工艺好氧区投加填料，可提升硝化活性、缩短水力停留时间、减少占地并增强适用性，但针对AOA工艺的优选填料种类尚无系统研究。对聚乙烯流化填料、维纶束固定填料、聚氨酯流化填料进行比选。结果表明，聚乙烯流化填料是AOA工艺好氧区的优选填料。在好氧区HRT从3.5 h缩至2 h的过程中，投加聚乙烯流化填料的装置NH₃-N去除效果最佳。其生物膜EPS含量为39.91 mg/g MLSS,硝化速率为7.46 mg NH₃-N/（g MLSS·h）,均高于其他填料。微生物群落分析显示，聚乙烯流化填料附着生物膜上主要氨氧化菌和亚硝酸盐氧化菌为Nitrosomonas和Nitrospira,相对丰度高于其他填料。更多还原

【Abstract】 The anaerobic/aerobic/anoxic（AOA） process is capable of achieving deep nitrogen removal when dealing with low C/N Municipal Wastewater. For wastewater treatment plants（WWTP） with restricted land availability, adding fillers to the aerobic zone of the AOA process can enhance nitrification activity, shorten the hydraulic retention time（HRT）, reduce land occupation, and enhance applicability. However, there has been no systematic research on the preferred types of fillers for the AOA process. This study compared polyethylene fluidized fillers, vinylon bundle filler, and polyurethane fluidized fillers. The results showed that polyethylene fluidized fillers were the preferred fillers for the aerobic zone of the AOA process. During the process of reducing the HRT in the aerobic zone from 3.5 h to 2 h, the device with polyethylene fluidized fillers had the best NH₃-N removal effect. The extracellular polymeric substances（EPS） content of the biofilm on the fluidized fillers was 39.91 mg/g MLSS, and the nitrification rate was 7.46 mgNH₃-N/（g MLSS·h）, both of which were higher than those of other fillers. Microbial community analysis revealed that the main ammonia-oxidizing bacteria and nitrite-oxidizing bacteria on the biofilm attached to the fluidized fillers were Nitrosomonas and Nitrospira, with relative abundances higher than those of other fillers.更多还原