Fe(Ⅱ)EDTA络合吸收耦合H_(2)-MBfR处理NO效能  

Performance of NO removal using Fe(II)EDTA complexing absorption coupled with H_(2)-MBfR.

作　　者：刘婉婷 钱飞跃[1,2] 赵俊杰 徐正慧 王建芳 缪润珠[1] LIU Wan-ting;QIAN Fei-yue;ZHAO Jun-jie;XU Zheng-hui;WANG Jian-fang;MIAO Run-zhu(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;National Local Joint Engineering Laboratory of Urban Domestic Wastewater Resource Utilization Technology,Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material,Suzhou 215009,China;Tianping College,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]城市生活污水资源化利用技术国家地方联合工程实验室,江苏高校水处理技术与材料协同创新中心,江苏苏州215009 [3]苏州科技大学天平学院,江苏苏州215009

出　　处：《中国环境科学》2024年第3期1335-1346,共12页China Environmental Science

基　　金：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)。

摘　　要：构建Fe(Ⅱ)EDTA络合吸收耦合H_(2)-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H_(2)-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%.An integrated system of Fe(II)EDTA complexing absorption coupled with H_(2)-based membrane biofilm reactor(H_(2)-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 H_(2)-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.

关 键 词：氢自养膜生物膜反应器(H_(2)-MBfR) 烟气脱硝 络合吸收 影响因素 

分 类 号：X511[环境科学与工程—环境工程]