首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
硫酸盐和Fe(Ⅱ)EDTA-NO/Fe(Ⅲ)EDTA厌氧还原过程特性及微生物群落分析
摘要点击 1374  全文点击 549  投稿时间:2017-04-23  修订日期:2017-05-23
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  同步烟气脱硫脱硝  硫酸盐还原  Fe(Ⅱ)EDTA-NO  Fe(Ⅲ)EDTA  微生物群落分析
英文关键词  simultaneous flue gas desulfurization and denitrification  sulfate reduction  Fe(Ⅱ) EDTA-NO  Fe(Ⅲ) EDTA  microbial community analysis
作者单位E-mail
张玉 大连理工大学环境学院, 工业生态与环境工程教育部重点实验室, 大连 116024 zhangyu@dlut.edu.cn 
万方 大连理工大学环境学院, 工业生态与环境工程教育部重点实验室, 大连 116024  
周集体 大连理工大学环境学院, 工业生态与环境工程教育部重点实验室, 大连 116024  
中文摘要
      在生物法烟气脱硫技术(Bio-FGD)和络合吸收生物还原脱硝技术(BioDeNOx)基础上,提出了生物结合络合吸收同步脱硫脱硝的工艺思路,该工艺利用加入Fe(Ⅱ) EDTA的碱性吸收液同时吸收烟气中的二氧化硫(SO2)和一氧化氮(NO).本研究在厌氧反应器中实现烟气脱硫脱硝吸收产物硫酸盐和Fe(Ⅱ) EDTA-NO/Fe(Ⅲ) EDTA的同步去除.结果表明,水力停留时间为16 h,pH维持在7.0时,硫酸盐的平均去除率为95.16%,Fe(Ⅱ) EDTA-NO的平均去除率为96.61%.硫酸盐的还原产物主要以液相中硫离子和气相中硫化氢的形式存在,Fe(Ⅱ) EDTA-NO的最终还原产物为N2.反应运行的各个阶段均可实现Fe(Ⅲ) EDTA的还原,但还原率会随HRT降低而下降.第5阶段反应器中主要的硫酸盐还原菌为Desulfomicrobium,同时存在异养反硝化菌Pseudomonas与两种硫自养反硝化菌SulfurimonasSulfurovum,并发现了两种具有还原单质硫功能的菌属ThermovirgaMesotoga.
英文摘要
      Based on biological flue gas desulfurization technology (Bio-FGD) and chelating absorption-biological regeneration technology (BioDeNOx), simultaneous desulfurization and denitrification by biological methods combined with chelating absorption technology has been proposed in this study. This technique uses an alkaline absorption liquid with Fe(Ⅱ) EDTA to absorb the SO2 and NO in the flue gas. In this study, an attempt is made to simultaneously remove sulfate (SO42-) and Fe(Ⅱ) EDTA-NO/Fe(Ⅲ) EDTA, which are the SO2 and NO absorption byproducts in an anaerobic reactor. The results indicate that average removal efficiencies for SO42- and Fe(Ⅱ) EDTA-NO of 95.16% and 96.61%, respectively, were achieved when the hydraulic residence time (HRT) and pH were controlled at 16 h and 7.0. The reduction products of SO42- were mainly in the form of S2- in the liquid phase and hydrogen sulfide (H2S) in the gas phase, while the reduction products of Fe(Ⅱ) EDTA-NO was N2. The reduction of Fe(Ⅲ) EDTA could be achieved at all stages of the operation, however, the reduction rate decreases with a reduction in the HRT. In the fifth stage, the main sulfate-reducing bacteria (SRB) in the reactor was Desulfomicrobium, a heterotrophic denitrifying bacteria, Pseudomonas, and two types of sulfur autotrophic denitrifying bacteria, Sulfurimonas and Sulfurovum, which coexisted. Two genera of bacteria that can also reduce sulfur, Thermovirga and Mesotoga, were also identified in the reactor.

您是第51721395位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2