中文摘要：

为提高脱氮性能，采用序批式反应器（SBR）培养亚硝化活性污泥。SBR在常温（15～30℃）下运行了110d，周期为8h（曝气为5h、缺氧为3h），采用间歇式曝气，曝气阶段的溶解氧控制在1．2～1．4mg／L。结果表明，亚硝化工艺的进水负荷可达0．24kgNH4^＋-N／（m^3·d），对氨氮的去除率稳定在80％以上，亚硝化率维持在90％以上。同时通过每半个月置换一次污泥上清液，解决了反应器因NO2^-累积造成的污泥浓度降低和处理效果不稳定的问题。对亚硝化污泥胞外聚合物（EPS）的分析表明，TB—EPS对污泥沉降性能的贡献明显大于LB—EPS。经驯化后污泥Zeta电位的电负值降低，表明亚硝化工艺的污泥沉降性能更好。此外，当亚硝化活性污泥驯化成功后反应器能在较高负荷下稳定运行。

英文摘要：

In order to improve nitrogen removal performance, short-cut nitrification activated sludge was cultivated in SBR for 110 days at normal temperatures （ 15 to 30 ℃ ）. The operation cycle of SBR was 8 hours with aeration of 5 h and non-aeration of 3 h. The DO was controlled at 1.2 to 1.4 mg/L in intermittent aeration phase. The results show that the influent loading rate of short-cut nitrification process can reach 0.24 kgNH4＋ - N/（ m3 ~ d）, and the removal rate of ammonia nitrogen and the nitro- sation rate are over 80% and 90% respectively. The problems of low sludge concentration and instable treatment efficiency in the reactor due to NO2- - N accumulation are resolved by replacing sludge superna- rant once per semi-month. The analysis of the extracellular polymeric substances （EPS） indicates that the contribution of TB-EPS to sludge settleability is higher than that of LB-EPS. The Zeta potential of the domesticated sludge is decreased, indicating that the settleability of sludge in short-cut nitrification process is better. In addition, after the short-cut nitrification activated sludge is successfully domesticated, the reactor can be stably operated at high loading rate.