Fe(II)EDTA络合吸收耦合H<sub>2</sub>-MBfR处理NO效能

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摘要构建Fe(II)EDTA络合吸收耦合H₂-MBfR一体化系统,驯化具有同步反硝化及铁还原能力的混合菌种,在维持反应体系稳定反硝化性能的基础上,探究进水Fe(II)EDTA浓度、pH值对NO去除效率的影响,分析微生物群落结构.结果表明,Fe(II)EDTA络合吸收耦合H₂-MBfR还原一体化系统对NO具有稳定去除效能,最大去除效率为99.50%.提高初始Fe(II)EDTA浓度有助于Fe(II)EDTA-NO的生成,且体系内的NO平均去除速率随着Fe(II)EDTA浓度的提升而提升.在Fe(II)EDTA浓度为10mmol/L时,NO最大去除速率达到44.68mg/(m³·h).pH值升高则不利于Fe(II)EDTA-NO的生成,控制pH值为6更适合一体化系统运行.微生物群落结构分析发现一体化阶段优势菌门Proteobacteria、Bacteroidetes和Firmicutes,在该反应器中承担着重要的功能和作用,其丰度占比分别为50.35%,16.43%,14.98%.

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	刘婉婷
	钱飞跃
	赵俊杰
	徐正慧
	王建芳
	缪润珠

关键词 ：氢自养膜生物膜反应器(H₂-MBfR), 烟气脱硝, 络合吸收, 影响因素

Abstract：An integrated system of Fe(II)EDTA complexing absorption coupled with H₂-based membrane biofilm reactor (H₂-MBfR) was constructed and a mixed bacterial strain capable of simultaneous denitrification and iron reduction was domesticated. Based on the maintenance of the stable denitrification of the reduction system, the effects of Fe(II)EDTA concentration and pH on NO removal efficiency were investigated and the microbial community structure was analyzed. The results showed that the Fe(II)EDTA complexing absorption coupled with H₂-MBfR reduction integrated system had a stable NO removal efficiency, and the maximum removal efficiency was 99.50%. Elevating the initial Fe(II)EDTA concentration facilitated the formation of Fe(II)EDTA-NO, subsequently enhancing average NO removals in the system. The maximum removal rate of 44.68mg/(m³·h) was achieved at a Fe(II)EDTA concentration of 10mmol/L. Increasing the pH hindered the accumulation of Fe(II)EDTA-NO, and maintaining a pH of 6proved more suitable for optimal operation of the integration system. The microbial community structure analysis revealed that the dominant phylum in the integration stage were Proteobacteria, Bacteroidetes and Firmicutes, played important roles in this system, with abundance of 50.35%, 16.43% and 14.98%, respectively.

Key words： hydrogen-based membrane biofilm reactor(H₂-MBfR) flue gas denitrification complexing absorption influencing factors

收稿日期: 2023-07-25

PACS:

X511

基金资助:国家自然科学基金资助项目(51878430);江苏省自然科学基金资助项目(BK20211339);江苏省研究生科研与实践创新计划项目(KYCX23_3352)

作者简介: 刘婉婷(1998-),女,江苏南京人,苏州科技大学环境科学与工程学院硕士研究生,主要研究方向为污染控制与资源.发表文章1篇.844655170@qq.com.

引用本文:

刘婉婷, 钱飞跃, 赵俊杰, 徐正慧, 王建芳, 缪润珠. Fe(II)EDTA络合吸收耦合H₂-MBfR处理NO效能[J]. 中国环境科学, 2024, 44(3): 1335-1346. LIU Wan-ting, QIAN Fei-yue, ZHAO Jun-jie, XU Zheng-hui, WANG Jian-fang, MIAO Run-zhu. Performance of NO removal using Fe(II)EDTA complexing absorption coupled with H₂-MBfR. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1335-1346.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I3/1335

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