Gasoline Degradation and Electricity Generation in Microbial Fuel Cell

• Main Authors: Pei-han Hsieh, 謝佩含
• Other Authors: I-Yuang Hsu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/49733877107824081043

碩士 === 中臺科技大學 === 安全與防災科技研究所 === 100 === Gasoline and sodium acetate aqueous solution were used in microbial fuel cells (MFCs) under several different operating conditions for electricity generation. Though variations in electrolyte composition, cathode air flow rate and substrate concentrations would affect the electricity generation, but they were not as significant as the variations in external resistance. For experiments using sodium acetate as the electron donor, the maximum stable potential was raised from 130 to 331 mV when the external resistance was switched from 100 Ω to 1000 Ω; however, the corresponding current and power densities were decreased 74 and 32 %, respectively. The Columbic Efficiency (CE) was decreased from 27 to 4 %, and the half-saturation constant was also reduced from 277 to 147 mg/L COD. Adding the mixture of toluene/MTBE as the co-substrate of sodium acetate did not raise the maximum stable potential, but prolonged the period of that and enhanced the electricity generation. For MFCs using gasoline aqueous solution as the substrate, the performance of electricity generation was much worse than previous MFCs using sodium acetate. It was only 1.3 mV generated despite the gasoline was degraded. The degradation rate of components in gasoline was ethyl benzene > p-xylene > toluene > benzene > o-xylene > MTBE. The addition of sodium acetate as the co-substrate or neutral red as the electron shuttle both did raise the electricity generation.