空气阴极微生物燃料电池的构型优化及其快速测定BOD的性能评价

Configuration optimization of air cathode microbial fuel cell and its performance evaluation for rapid determination of BOD

设计了一种新型双室空气阴极微生物燃料电池(MFC)并将其作为生物传感器,与传统双室空气阴极MFC进行对比,考察其电化学性能及用于快速检测BOD的性能。结果表明:新型空气阴极MFC可有效提高功率密度并降低内阻,其功率密度最高为897 mW·m^(-2),而内阻最低为92Ω;该MFC可用于直接快速检测高浓度有机物的BOD,对醋酸钠底物的线性检测限为1280 mg·L^(-1),在此底物浓度下MFC的检测时间为31.2~66 h,线性可决系数R2为0.97~0.99;对于GGA底物的线性检测限为1250 mg·L^(-1),在此底物浓度下MFC的检测时间为33~67 h,线性可决系数R^(2)为0.98。本研究可为MFC型BOD检测传感器的性能优化提供参考。

A new dual-chamber air cathode MFC was designed and compared with the traditional dual-chamber air cathode MFC to examine the electrochemical performance and the performance for rapid detection of BOD.Results show that the new designed air cathode MFC can effectively increase power density reaching up to897 mW·m^(-2) and reduce internal resistanceto as low as 92Ω.Moreover,it can be used to directly and quickly detect BOD of organic compounds with high concentration,with the linear detection limit of sodium acetate being 1280 mg·L^(-1),response time at this concentration being 31.2~66 h,and the linear coefficient of determination R^(2) being 0.97~0.99.The linear detection limit of GGA can reach 1250 mg·L^(-1).The response time at this concentration is 33~67 h,and the linear coefficient of determination R^(2) is 0.98.Our results provide a new pathway for the performance optimization of the MFC type BOD detection sensor.