The positive effect of buffers to maintain a sui pH for microorganism growth and increase the electrolyte conductivity in microbial fuel cells (MFCs) encourages more studies on the development of new buffer solutions. The effect of types of biological buffers such as phosphate, tris, succinate, and maleate on power production in dual chamber MFC inoculated by saccharomyces cerevisiae has been examined. Electrochemical impedance spectroscopy has been used for evaluating the performance of the buffered and non-buffered MFC systems. Considering the important impact of buffer type on the resistance of ion migration within the electrolyte and electron transport resistance of the cell components, the internal resistance of the MFC with different used buffers has been obtained and compared. According to the obtained results, the tris buffer solution showed a positive influence on the power output with a power density of 25.41% higher than phosphate.

中文翻译：

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缓冲和非缓冲微生物燃料电池的电化学阻抗谱研究

缓冲液在维持适合微生物生长的 pH 值和增加微生物燃料电池 (MFC) 中的电解质电导率方面的积极作用鼓励对新缓冲溶液的开发进行更多研究。磷酸盐、tris、琥珀酸盐和马来酸盐等生物缓冲液类型对接种酿酒酵母的双室 MFC 发电的影响已经过检查。电化学阻抗谱已用于评估缓冲和非缓冲 MFC 系统的性能。考虑到缓冲液类型对电解质内离子迁移阻力和电池组件电子传输阻力的重要影响，已经获得并比较了使用不同缓冲液的 MFC 的内阻。根据获得的结果，tris 缓冲溶液对功率输出有积极影响，功率密度比磷酸盐高 25.41%。