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[1]鲍白翎,杨厚云,苏馈足,等.微生物电合成系统还原二氧化碳产甲烷的电势依赖性[J].应用与环境生物学报,2017,23(06):968-973.[doi:10.3724/SP.J.1145.2017.01008]
　BAO Bailing,YANG Houyun,et al.Influence of cathodic potential on methane production from CO2 in a microbial electrosynthesis system[J].Chinese Journal of Applied & Environmental Biology,2017,23(06):968-973.[doi:10.3724/SP.J.1145.2017.01008]
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微生物电合成系统还原二氧化碳产甲烷的电势依赖性()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
23卷
期数:
2017年06期
页码:
968-973
栏目:
微生物资源发掘与生物合成专栏论文
出版日期:
2017-12-25

文章信息/Info

Title:
Influence of cathodic potential on methane production from CO2 in a microbial electrosynthesis system
作者:
鲍白翎;  杨厚云;  苏馈足;  穆杨
1合肥工业大学土木与水利工程学院 合肥 230009 2中国科学技术大学化学与材料科学学院 合肥 230026
Author(s):
BAO Bailing1;  2;  YANG Houyun2;  SU Kuizu1** & MU Yang2**
1 School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China 2 School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
关键词:
微生物电合成系统（MES）; 二氧化碳; 甲烷; 阴极电势; Methanobacterium
Keywords:
microbial electrosynthesis system (MES);  carbon dioxide;  methane;  cathode potential;  Methanobacterium
分类号:
TM911.45 : X172
DOI:
10.3724/SP.J.1145.2017.01008
摘要:
二氧化碳（CO2）资源化利用是近年来的一个研究热点，利用生物电化学系统还原CO2生产能源物质是一种新兴技术. 在微生物电合成系统（MES）中利用混合微生物富集阴极功能微生物，评估阴极电势对其还原CO2产甲烷的影响. 当阴极电势从-0.70 V降低到-0.90 V vs Ag/AgCl时，MES产甲烷的量和速率都在增加，最大的产甲烷量和速率分别达到了0.265 mol/m2和0.025 mmol/h. 与此同时，MES的电流密度从0.002 A/m2增加到0.18 A/m2，阴极产甲烷的库伦效率在49%和90%之间. 当阴极电势更负时，MES阴极几乎不产甲烷. 扫描电镜分析（SEM）表明，有多种不同形态的微生物吸附在阴极碳毡上，它们的形态主要呈杆状和球状. 16S rDNA测序分析表明Methanobacterium是MES阴极生物膜上优势的产甲烷菌. 本研究表明，微生物电合成系统还原CO2产甲烷的阴极电势必须控制在适当的范围内，才能高效地还原CO2产甲烷. （图8 表1 参36）
Abstract:
Carbon dioxide utilization has been an important research topic in recent years. The use of bioelectrochemical systems capable of reducing CO2 to produce energy is an emerging technology. This study evaluated the effect of cathodic potential on methane production from CO2 in microbial electrosynthesis systems (MESs) with a mixed-culture biocathode. As the cathodic potential was decreased from ?0.70 V to ?0.90 V vs. Ag/AgCl, the yield and rate of methane production increased; the maximum amount and highest rate of methane production in MESs reached up to 0.265 mol/m2 and 0.025 mmol/h, respectively. The current density of the MES increased markedly, from 0.002 A/m2 to 0.18 A/m2, while the coulombic efficiency of methane production in the cathode increased from 49% to 90%. When the cathodic potential was more negative, the cathode of the MES produced negligible amounts of methane. Scanning electron microscope (SEM) confirmed that a variety of microorganisms were attached to the cathode carbon felt, and the morphologies of these microorganisms were mainly in the shapes of rods and spheres. 16S rDNA sequencing analysis revealed that Methanobacterium was the predominant methanogen in the biofilm on the cathode of the MES. These results suggest that the cathodic potential in MESs must be controlled within an appropriate range, to efficiently produce methane from CO2.

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相似文献/References:

[1]蒋永,苏敏,张尧,等.生物电化学系统还原二氧化碳同时合成甲烷和乙酸[J].应用与环境生物学报,2013,19(05):833.[doi:10.1088/1748-9326/5/3/034011]
　JIANG Yong,SU Min,ZHANG Yao,et al.Simultaneous Production of Methane and Acetate from Carbon Dioxide with Bioelectrochemical Systems[J].Chinese Journal of Applied & Environmental Biology,2013,19(06):833.[doi:10.1088/1748-9326/5/3/034011]
[2]张尧,张闻杰,蒋永,等.生物电化学系统固定二氧化碳同时产生乙酸和丁酸[J].应用与环境生物学报,2014,20(02):174.[doi:10.3724/SP.J.1145.2014.00174]
　ZHANG Yao,ZHANG Wenjie,JIANG Yong,et al.Simultaneous microbial electrosynthesis of acetate and butyrate from carbon dioxide in bioelectrochemical systems[J].Chinese Journal of Applied & Environmental Biology,2014,20(06):174.[doi:10.3724/SP.J.1145.2014.00174]

更新日期/Last Update: 2017-12-25