The key operational constraints of the microbial fuel cell (MFC) technology in achieving its due potential are the high cost of electrodes and the difficulties in scaling up. To address these issues, carbonized corncob anodes were prepared and modified with the hydrogen peroxide (H₂O₂) to increase the oxygenated functional groups favoring the extracellular electron transfer between the microbes and electrodes. Compared to the MFC with anode without any modification, that is, bare anode, the single chambered MFC with 20% H₂O₂ modified anode exhibited excellent electro-catalytic activity and a 91% decrease in the internal resistance (decreased from 35 ± 0.5 to 3.0 ± 0.6 kΩ) along with 89% increase in the maximum power density (increased from 8.8 ± 0.7 to 89.7 ± 0.6 mW/m²). MFCs with 20% H₂O₂ modified anode resulted in high decolorization efficiency of real dye wastewater (RDW) up to 92% which is 18% higher than that of the MFC with the bare anode. In order to boost the power output, the system was designed and studied by electrically stacking the 24 individual units of the MFC with the modified anode into parallel and series configurations. In parallel stacking and series stacking, the power output was 18.9 and 13.5 times higher than the single MFC unit, respectively. The RDW degradation rate was in the order of parallel stack > series stack > single MFC unit.

中文翻译：

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使用 H2O2 改性玉米芯阳极改善染料废水脱色并提高电堆叠微生物燃料电池的功率输出

微生物燃料电池 (MFC) 技术在实现其应有潜力方面的关键操作限制是电极的高成本和扩大规模的困难。为了解决这些问题，制备碳化玉米芯阳极并用过氧化氢 (H ₂ O ₂ ) 进行改性，以增加氧化官能团，有利于微生物和电极之间的细胞外电子转移。与没有任何修改的带阳极的 MFC，即裸阳极相比，含 20% H ₂ O ₂的单室 MFC改性阳极表现出优异的电催化活性，内阻降低 91%（从 35±0.5 降低到 3.0±0.6 kΩ），最大功率密度增加 89%（从 8.8±0.7 增加到 89.7±0.6 mW） /米² )。含 20% H ₂ O _{2 的}MFC改性阳极对真实染料废水（RDW）的脱色效率高达 92%，比采用裸阳极的 MFC 脱色效率高 18%。为了提高功率输出，该系统的设计和研究是通过将带有改良阳极的 MFC 的 24 个独立单元电气堆叠成并联和串联配置。在并联堆叠和串联堆叠中，功率输出分别比单个 MFC 单元高 18.9 倍和 13.5 倍。RDW 降解率的顺序为并联堆 > 串联堆 > 单个 MFC 单元。