Improved electricity generation, coulombic efficiency and microbial community structure of microbial fuel cells using sodium citrate as an effective additive - 文章详情页

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EI SCIE

摘要：

Cost-effective　and　easy-to-operate　optimization　strategies　are　always　crucial　for　accelerating　the　practical　application　of　microbial　fuel　cells　(MFCs).　In　this　study,　sodium　citrate,　a　widely-used　food　and　industrial　additive　with　the　properties　of　pH　adjustment　and　microbial　degradability,　is　applied　as　anolyte　additive　in　MFCs　to　enhance　the　bioelectricity　generation.　The　maximum　power　density　and　coulombic　efficiency　of　MFC　with　0.2　g　L−1　sodium　citrate　addition　(0.2-Cit　MFC)　is　achieved　as　784.05　mW　m−2　and　56.17%　respectively,　increasing　by　58.33%　and　64.38%　compared　with　that　of　the　MFC　without　sodium　citrate　addition　(0-Cit　MFC).　Electrochemical　impedance　spectroscopy,　cyclic　voltammetry　and　pH　tests　performed　in　each　MFC　cycle　show　that　adding　sodium　citrate　significantly　improves　the　biocatalytic　activity　of　anode,　slows　down　the　performance　decline　tendency　and　restrains　the　sharply-dropped　pH　as　the　operation　cycle　increases.　Besides,　microbial　community　analysis　reveals　that　the　electroactive　biofilm　in　0.2-Cit　MFC　has　the　obviously　higher　population　abundance　and　diversity　than　that　in　0-Cit　MFC.　This　finding　is　important　in　that　sodium　citrate　as　the　bi-functional　and　bio-degradable　additive　can　help　stimulate　the　activity　of　bioanode　and　regulate　the　pH　in　biofilm　region　simultaneously　without　causing　secondary　pollution.　©　2020　Elsevier　B.V.

关键词：

Biofilms Cost effectiveness Cyclic voltammetry Efficiency Electrochemical impedance spectroscopy Electrophysiology Food additives Fuel additives Microbial fuel cells Microorganisms Sodium compounds Sodium metallography

作者机构：

[ 1 ] [Chen, Wenwen]MoE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Department of New Energy Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Liu, Zhongliang]MoE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Department of New Energy Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Li, Yanxia]MoE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Department of New Energy Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Xing, Xiaoye]MoE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Department of New Energy Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Liao, Qiang]MoE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing; 400030, China
[ 6 ] [Zhu, Xun]MoE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing; 400030, China

通讯作者信息：

刘中良
[liu, zhongliang]moe key laboratory of enhanced heat transfer and energy conservation, department of new energy science and engineering, beijing university of technology, beijing; 100124, china

电子邮件地址：

liuzhl@bjut.edu.cn

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