废铁屑强化高盐条件下厌氧氨氧化系统脱氮研究

徐浩哲; 秦曼瑜; 厉曾一; 张钘昱; 刘文如

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (11) : 6112-6119.

水污染与控制

废铁屑强化高盐条件下厌氧氨氧化系统脱氮研究

徐浩哲¹, 秦曼瑜¹, 厉曾一¹, 张钘昱¹, 刘文如^1,2

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Nitrogen removal in ANAMMOX system enhanced by waste iron scrap under high salinity conditions

XU Hao-zhe¹, QIN Man-yu¹, LI Zeng-yi¹, ZHANG Xing-yu¹, LIU Wen-ru^1,2

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摘要

通过上流式厌氧污泥床(UASB)反应器研究在不同盐度进水中废铁屑对厌氧氨氧化(ANAMMOX)系统脱氮效能的影响.结果表明,废铁屑对提升ANAMMOX脱氮效能有一定的促进作用.在2.75%~3%盐度下,氮去除负荷(NRR)从(0.39±0.12)kg/(m³·d)上升到(2.88±0.09)kg/(m³·d),而在盐度达到3.5%时系统崩溃.比厌氧氨氧化活性(SAA)出现了先上升,在3.5%盐度时下降的趋势.通过分析胞外聚合物(EPS)发现,废铁屑的投加有助于蛋白质/多糖(PN/PS)的下降,促进形成紧密的颗粒污泥.微生物分析显示,高盐度降低了反应器中ANAMMOX菌(AnAOB)(CandidatusKuenenia)的丰度.值得注意的是,一种潜在的新型ANAMMOX细菌(Brocadiaceaeunclassified)始终占据主导地位(占比54.1%),表明该菌可能在高盐条件下维持氮去除性能中起到了关键作用.本文研究结果可为ANAMMOX工艺处理高盐废水提供理论支撑.

Abstract

The effect of scrap iron on the nitrogen removal performance of theanaerobic ammonium oxidation (ANAMMOX) system under different salinity influents was investigated using anUpflow Anaerobic Sludge Blanket (UASB) reactor. The results showed that scrap iron had a positive effect on enhancing the nitrogen removal efficiency of the ANAMMOX process. Under salinity conditions ranging from 2.75% to 3%, the nitrogen removal rate (NRR) increased from 0.39±0.12kg/(m³·d) to 2.88±0.09kg/(m³·d). However, when the salinity reached 3.5%, the system collapsed. With the addition of scrap iron, the specific anammox activity (SAA) first increased and then decreased at 3.5% salinity. Extracellular Polymeric Substances (EPS) analysis indicated that the addition of scrap iron contributed to a decrease in theProtein/polysaccharide(PN/PS)ratio, promoting the formation of dense granular sludge. Microbial community analysis revealed that high salinity reduced the abundance of AnAOB(CandidatusKuenenia) in the reactor. Notably, a potentially novel AnAOB (Brocadiaceaeunclassified), consistently dominated the community (accounting for 54.1%), suggesting that this strain may play a key role in maintaining nitrogen removal performance under high-salinity conditions. The results of this paper could provide theoretical support for the treatment of high-salt wastewater by the ANAMMOX process.

导出引用

徐浩哲, 秦曼瑜, 厉曾一, 张钘昱, 刘文如. 废铁屑强化高盐条件下厌氧氨氧化系统脱氮研究[J]. 中国环境科学. 2025, 45(11): 6112-6119

XU Hao-zhe, QIN Man-yu, LI Zeng-yi, ZHANG Xing-yu, LIU Wen-ru. Nitrogen removal in ANAMMOX system enhanced by waste iron scrap under high salinity conditions[J]. China Environmental Science. 2025, 45(11): 6112-6119

中图分类号： X703

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