To enhance the startup and efficient simultaneous nitrification and denitrification for sewage treatment, sequencing batch biofilm reactors (SBBRs) partially coupled with rice husk were established and operated under various intermittent micro-aeration cycles (IMCs) and COD/N ratios under oxygen-limiting intermittent aeration conditions. Experimental results showed that the increase of IMCs with non-aeration/micro-aeration mode of (8 h/4 h)₁ to (2 h/1 h)₄ in a 12 h-cycle accelerated the startup performance and improved NH₄⁺–N and COD removal. NH₄⁺–N, TN and COD removal efficiencies were 98.7 ± 0.9, 89.2 ± 5.2 and 82.9 ± 6.7% at COD/N ratio of 7.6 with the highest IMCs in SBBR, respectively. Higher TN removal efficiencies of 87.2 ± 4.0 and 58.1 ± 3.5% were also achieved at lower COD/N ratio of 5.6 and 2.8, respectively. In SBBRs with various IMCs, facultative denitrifier like genus Acinetobacter and solid-phase denitrifier belonging to Comamonadaceae family were enriched. However, aerobic denitrifiers with function of heterotrophic nitrification like Paracoccus were favored to enrich under higher IMCs condition, and more anoxic denitrifiers like sulfur-based autotrophic denitrifier Thiothrix and heterotrophic denitrifiers like Pseudomonas and Methyloversatilis were observed at lower IMCs condition. Autotrophic nitrifier (Nitrosomonas and Nitrosipra) and heterotrophic nitrifiers both contributed to the efficient nitrification.

中文翻译：

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在具有可生物降解载体的限氧间歇曝气SBBR中同时进行硝化-反硝化和微生物群落特征。

为了增强启动和有效的同时硝化和反硝化用于污水处理的能力，建立了部分与稻壳结合的分批分批生物膜反应器（SBBR）测序，并在各种间歇性微曝气循环（IMC）和COD / N比下以限氧性间歇运行曝气条件。实验结果表明，在12 h周期中，非曝气/微曝气模式（8 h / 4 h）₁至（2 h / 1 h）₄的IMC的增加加速了启动性能并改善了NH ₄ ⁺ -N和COD去除。NH ₄ ⁺在SBBR中具有最高IMC的COD / N比为7.6时，–N，TN和COD去除效率分别为98.7±0.9、89.2±5.2和82.9±6.7％。在较低的COD / N比分别为5.6和2.8时，TN去除效率也更高，分别为87.2±4.0和58.1±3.5％。与各种的IMC SBBRs，象属兼反硝化细菌不动杆菌属和属于固相反硝化Comamonadaceae家庭中富集。然而，在较高的IMC条件下，偏氧亚硝化功能好氧反硝化剂如Paracoccus倾向于富集，而更多的缺氧反硝化剂如硫基自养反硝化剂Thiothrix和异养反硝化剂如Pseudomonas和Pseudomonas。在较低的IMC条件下观察到甲基过饱和。自养硝化细菌（亚硝化单胞和Nitrosipra）和异养硝化细菌的高效硝化都作出了贡献。