外阻对双室微生物燃料电池性能的影响  

Effect of External Resistance on the Performance of Two-Chamber Microbial Fuel Cell

作　　者：荣宏伟[1] 王佳 储昭瑞 张朝升[1] 方茜[1] RONG Hongwei;WANG Jia;CHU Zhaorui;ZHANG Chaosheng;FANG Qian(Guangdong Engineering Research Center for Water Quality Safety and Pollution Control, Guangzhou University, Guangzhou 510006, China)

机构地区：[1]广州大学广东省水质安全及污染控制工程技术研究中心,广东广州510006

出　　处：《水处理技术》2019年第1期46-50,共5页Technology of Water Treatment

基　　金：国家自然科学基金(51778155;21477027);广东省科技计划项目(2014A020216049);广东省自然科学基金(2017A030313310);广州大学研究生创新研究资助计划(2017GDJC-M44)

摘　　要：实验分析了阴极硝化耦合阳极反硝化微生物燃料电池在不同外阻(10、100、500Ω和无穷大)下,电池的产电性能、阴极液和阳极液的电导率以及脱氮除碳能力的变化情况。结果表明,在低电阻下,输出的稳定电流较大,有机物降解速率较快,TN去除率较高。当外阻为10Ω时,输出的稳定电流是3.61 m A,COD的去除速率最快为10.33mg/(L·h),在运行160 h时TN去除率达到100%。MFC运行过程中,阳极溶液的电导率逐渐减小,阴极溶液的电导率逐渐增大。当外阻为10Ω时,阴阳极溶液的电导率差最大。CV扫描表明外阻对阳极生物膜氧化还原能力有影响,且低电阻下阳极形成的生物膜上产电活性菌的氧化能力越强。The electrochemical performance, ionic conductivity of cathode and anode solutions and simultaneous carbon and nitrogen removal of cathode nitrification coupled to anode denitrification in a microbial fuel cell were analyzed at different resistances. The results showed that the output stable current, the degradation rate of organics and the removal rate of total nitrogen were better in the MFC operated with small external resistances. The highest output stable current of 3.61 mA, the fast organic degradation rate of 10.33 mg/(L·h) and total nitrogen removal rate of 100% at 160 h were achieved from the MFC working at 10 Ω. During the operation of MFC, the ionic conductivity of anode solution gradually decreased and the ionic conductivity of cathode solution gradually increased. When the external resistance was 10 Ω, the difference between the ionic conductivity of the cathode solution and the anode solution was the largest. Cyclic voltammetry (CV) displayed that the external resistance had an effect on the redox ability of the anodic biofilm, and oxidation ability of the electrochemical activity bacteria on the anodic biofilm under low resistance was stronger.

关 键 词：微生物燃料电池 外阻 产电性能 脱氮除碳 循环伏安法 

分 类 号：TM911.45[电气工程—电力电子与电力传动]