N2O emission in a partial nitrification system: Dynamic emission characteristics and the ammonium-oxidizing bacteria community
N2O emission in a partial nitrification system: Dynamic emission characteristics and the ammonium-oxidizing bacteria community
复制标题
部分硝化系统中的 N2O 排放：动态排放特征和铵氧化细菌群落
DOI：
10.1016/j.biortech.2012.10.011
复制
发表时间：
2013-01-01
影响因子：
11.4
通讯作者：
Tian, Lin
中科院分区：
文献类型：
--
作者：
Kong, Qiang;Liang, Shuang;Tian, Lin
本研究试图阐明氧化亚氮(N2O)的排放动力学，并研究部分硝化系统中氨氧化细菌(AOB)群落的演变，该系统产生适合厌氧氨氧化工艺的进水。根据长期监测，(0.80+/-0.19，n=7)%的进水氮负荷以N2O的形式排放。在部分硝化过程中，N2O的排放速率在好氧期开始时达到最大值，并在初始峰值后稳定在较低的水平。此外，周期运行初期N2O排放量迅速增加，30 mm后产量下降。根据聚合酶链式反应(PCR)和变性梯度凝胶电泳(DGGE)分析，导致部分硝化系统产生N2O的主要AOB是亚硝化单胞菌。两株亚硝酸单胞菌均为亚硝化单胞菌。Nm33和亚硝酸单胞菌。Nm58在高氨浓度时被富集。(C)2012爱思唯尔有限公司。保留所有权利。
This study attempts to elucidate the dynamics of nitrous oxide (N2O) emission and investigate the evolution of the ammonium-oxidizing bacteria (AOB) community in a partial nitrification system producing an influent suitable for the anammox process. Based on long-term monitoring, (0.80 +/- 0.19, n = 7)% of the incoming nitrogen load was emitted as N2O. During the partial nitrification process, the N2O emission rate reached a maximum at the beginning of the aerobic period and stabilized at a low level after an initial peak. Moreover, the quantity of N2O emission increased quickly at the beginning of the cycle operation and then production slowed after 30 mm. According to polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE) analysis, the dominant AOB causing the N2O emission from the partial nitrification system were Nitrosomonas sp. Both Nitrosomonas sp. Nm33 and Nitrosomonas sp. Nm58 were enriched at high ammonia concentrations. (c) 2012 Elsevier Ltd. All rights reserved.