中文摘要：

采用UASB／SBBR组合工艺处理垃圾渗滤液，通过控制游离氨（FA）浓度使系统实现亚硝酸型同步硝化反硝化（SND），在此基础上考察了序批式生物膜反应器（SBBR）对总氮和氨氮的去除特性，同时深入分析了亚硝酸型SND的形成机理。试验结果表明：经过60个周期的运行，SBBR系统实现了亚硝酸型SND，且对总氮和氨氮有较高的去除率。当DO为2mg／L左右时，对TN和NH4＋—N的平均去除率分别可达58．95％和95％以上，曝气结束时的SND脱氮率最高可达34．3％。另外，试验发现FA是SBBR系统内亚硝酸型SND形成的主要因素。当FA在13．00～29．84mg／L范围内变化时，亚硝态氮的积累率从初始的1．7％逐渐上升到93．01％，并能稳定维持在90％以上。

英文摘要：

On the basis of achieving simultaneous nitrification and denitrification （SND） via nitrite through controlling the concentration of free ammonia （FA） in landfill leachate in UASB-SBBR system, the removal of total nitrogen and ammonia nitrogen in SBBR system was investigated, with deep analysis of mechanism of SND via nitrite. The results indicate that SND via nitrite is achieved in SBBR with high removal efficiency of total nitrogen and ammonia nitrogen after 60 cycles. When the concentration of dissolved oxygen is about 2 mg/L, the average removal rates of TN and NH4＋ - N are 58.95% and above 95% respectively, and the maximum efficiency of SND at the end of aeration is 34.3%. FA is the main factor for formation of SND via nitrite in SBBR system. When the concentration of FA is between 13.00 and 29. g4 mg/L, the nitrite accumulation ratio is increased from 1.7% to 93.01% gradually and is maintained at above 90%.