Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China and Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu, 610041, China E-mail:
Water Sci Technol. 2020 Dec;82(12):2990-3002. doi: 10.2166/wst.2020.544.
In this study, the performance and mechanism of nitrogen removal in sequencing batch reactors (SBRs) with and without zero-valent iron (ZVI) was investigated. The results showed that ZVI had a capacity to promote NH-N conversion, NO-N accumulation and total inorganic nitrogen (TIN) removal, with the TIN removal rate being increased by 29.45%. The ZVI also had a significant impact on microbial community structure by means of high-throughput pyrosequencing, increasing the enrichment of Anammox (anaerobic ammonium oxidation) bacteria Candidatus Brocadia and Feammox (anaerobic ferric ammonium oxidation) bacteria Ignavibacterium. With ZVI addition, the main pathway of nitrogen removal was changed from nitrification-heterotrophic denitrification to Anammox and Feammox.
本研究考察了序批式反应器（SBR）中添加和不添加零价铁（ZVI）时的脱氮性能和机制。结果表明，ZVI 具有促进 NH-N 转化、NO-N 积累和总无机氮（TIN）去除的能力，TIN 去除率提高了 29.45%。ZVI 还通过高通量焦磷酸测序对微生物群落结构产生了显著影响，增加了厌氧氨氧化菌 Candidatus Brocadia 和厌氧铁氨氧化菌 Ignavibacterium 的富集。添加 ZVI 后，氮去除的主要途径从硝化-异养反硝化转变为厌氧氨氧化和铁氨氧化。
