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N2O emission and bacterial community dynamics during realization of the partial nitrification process

机译：实现部分硝化过程中的N2O排放和细菌群落动态

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In this study, greenhouse gas emissions and microbial community succession during the realization of the partial nitrification (PN) process were studied. The results show that N _(2) O emission mainly occurred in the aerobic stage and the PN reactor released about 20 mg of N _(2) O gas each cycle. There is a positive correlation between the dissolved N _(2) O concentration and the temperature of a typical cycle. High-throughput sequencing was used to illustrate succession in the microbial community structure. The most significant microfloral change during the PN startup process was that some aerobic bacteria were relatively enriched and some anaerobic bacteria were weeded out. The ammonia oxidizing bacteria (AOB) like Nitrosomonadaceae were enriched on account of the suitable external environment. Pseudomonas whose main function is denitrification declined and Planctomyces (anammox) showed the same tendency. This study comprehensively demonstrates the fluctuations of dissolved and emitted N _(2) O while researching the succession of the microbial community in the culture of the PN process.
机译：在这项研究中，研究了实现部分硝化（PN）过程期间的温室气体排放量和微生物群落演替。结果表明，N _（2）O的排放主要发生在有氧阶段，PN反应器每个循环释放约20 mg的N _（2）O气体。溶解的N _（2）O浓度与典型循环温度之间存在正相关。高通量测序用于说明微生物群落结构的演替。 PN启动过程中最重要的菌群变化是某些需氧菌相对富集，而某些厌氧菌被清除。由于合适的外部环境，富集了诸如亚硝基亚科的氨氧化细菌（AOB）。主要功能为反硝化作用的假单胞菌下降，而扁平菌（厌氧氨氧化菌）表现出相同的趋势。这项研究全面地证明了溶解氮和排放氮_（2）O的波动，同时研究了PN过程文化中微生物群落的演替。

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