新型黄铁矿驱动自养反硝化生物滤池协同氨氮和硝氮去除。
Synergistic ammonia and nitrate removal in a novel pyrite-driven autotrophic denitrification biofilter.
机构信息
Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, International Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; State Environmental Protection Key Laboratory of Microorganism Application and Risk Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
Civil Engineering, School of Engineering, College of Science and Engineering, National University of Ireland, Galway, Galway H91 TK33, Ireland.
出版信息
Bioresour Technol. 2022 Jul;355:127223. doi: 10.1016/j.biortech.2022.127223. Epub 2022 Apr 26.
Pyrite is one kind of cost-effective electron donors for nitrate denitrification. In this study, a pyrite-driven autotrophic denitrification biofilter was applied for simultaneous removal of NH and NO over the 150-day. The influent NH/NO ratio (0.3-1.7) had less effect on system performance, while for the hydraulic retention times (HRTs, 24-3 h), the removal percentage of both > 90% and removal loading rates of 52.8 and 59.4 mg N/(L·d) for NH and NO removal were obtained at the HRT of 6 h. The 16S rRNA genes analysis showed that Ferritrophicum, Thiobacillus, Candidatus_Brocadia, and unidentified_Nitrospiraceae were predominant. Analyses of nitrogen and sulfur metabolism showed that ammonia was removed by complete nitrification, nitrate was reduced to N, and sulfide was oxidized to sulfate. Dynamics of pollutants within the reactor and microbial activity showed nitrification/Anammox and pyrite-driven autotrophic denitrification were responsible for the synergistic removal of NH/NO in this system.
黄铁矿是一种具有成本效益的电子供体，可用于硝酸盐反硝化。在这项研究中，采用黄铁矿驱动的自养反硝化生物滤池在 150 天内同时去除 NH 和 NO。进水 NH/NO 比（0.3-1.7）对系统性能的影响较小，而水力停留时间（HRTs，24-3 h），在 HRT 为 6 h 时，NH 和 NO 的去除率均>90%，去除负荷率分别为 52.8 和 59.4 mg N/（L·d）。16S rRNA 基因分析表明，Ferritrophicum、Thiobacillus、Candidatus_Brocadia 和未鉴定的_Nitrospiraceae 为优势菌属。氮和硫代谢分析表明，氨通过完全硝化去除，硝酸盐还原为 N，硫化物氧化为硫酸盐。反应器内污染物动力学和微生物活性表明，硝化/厌氧氨氧化和黄铁矿驱动的自养反硝化共同作用是该系统协同去除 NH/NO 的原因。
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