Effect of Cathodic Biofilm on the Performance of Air-Cathode Single Chamber Microbial Fuel Cells

Bulletin of the Korean chemical society

Sunghyun Kim¹  Jalal Ahmed¹ 

关键词: Microbial fuel cell;    Cathodic biofilm;    Coulombic efficiency;    Internal resistance;    Extracellular polymeric substance;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Biofilm formation is inevitable in a bioelectrochemical system in which microorganisms act as a sole biocatalyst. Cathodic biofilm (CBF) works as a double-edged sword in the performance of the air-cathode microbial fuel cells (MFCs). Proton and oxygen crossover through the CBF are limited by the robust structure of extracellular polymeric substances, composition of available constituents and environmental condition from which the biofilm is formed. The MFC performance in terms of power, current and coulombic efficiency is influenced by the nature and origin of CBF. Development of CBF from different ecological environment while keeping the same anode inoculums, contributes additional charge transfer resistance to the total internal resistance, with increase in coulombic efficiency at the expense of power reduction. This study demonstrates that MFC operation conditions need to be optimized on the choice of initial inoculum medium that leads to the biofilm formation on the air cathode.

【 授权许可】

Unknown