Achieving fast start-up of anammox process by promoting the growth of anammox bacteria with FeS addition
Achieving fast start-up of anammox process by promoting the growth of anammox bacteria with FeS addition
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添加FeS促进厌氧氨氧化菌生长，实现厌氧氨氧化工艺的快速启动
DOI：
10.1038/s41545-020-00088-w
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发表时间：
2020-10
期刊：
影响因子：
11.4
通讯作者：
Jinglan Hong
中科院分区：
文献类型：
--
作者：
Chunzhen Zou;Beibei Guo;Xuming Zhuang;Liying Ren;Shou-Qing Ni;Shakeel Ahmad;Zhuangming Qiao;Zhaojie Cui;Jinglan Hong
研究了硫化亚铁对厌氧氨氧化工艺脱氮性能及微生物群落的影响。在反应器启动阶段，FeS能显著提高亚硝酸盐和总氮的去除率。FeS的加入增加了反应器中铁离子的含量，促进了血红素的合成，血红素参与了多种酶的形成。与对照相比，FeS反应器中厌氧氨氧化菌的丰度提高了29%，thenirS基因（编码含血红素的cd 1型亚硝酸还原酶）的表达量提高了近一倍。群落中亚硝酸还原酶（产氨酶）的含量增加了26.4%。微生物群落中功能菌和酶含量的差异导致两个反应器的脱氮率（NRR）存在差异。高通量结果表明，FeS提高了微生物群落的丰富度和多样性，增强了微生物群落的代谢功能。FeS的加入没有改变Ca的优势地位。两个反应堆都有。但FeS的加入降低了异养硝化细菌的相对丰度，这可能与FeS抑制S2−的产生有关。
The effects of FeS on nitrogen removal performance and microbial community of anammox process were studied. During the start-up period, the removal efficiencies of nitrite and total nitrogen were significantly improved by FeS. The addition of FeS increased the content of iron ions in the reactor and promoted the synthesis of hemec, which was involved in the formation of various enzymes. Compared with the control, the abundance of anammox bacteria in the FeS reactor was increased by 29%, and the expression level of thenirSgene (encoding cd1type nitrite reductase containing heme) was nearly doubled. The content of nitrite reductase (ammonia-forming) in the community was increased by 26.4%. The difference in functional bacteria and enzyme contents in the microbial community resulted in a difference in nitrogen removal rate (NRR) between the two reactors. High-throughput results indicated that FeS increased the richness and diversity of microbial community and enhanced the metabolic function of the microbial community. The addition of FeS did not change the dominant position ofCa. Kueneniain both reactors. But the relative abundance of heterotrophic denitrifying bacteria was reduced with FeS, which may be related to the inhibition effect of S2−produced by FeS.
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