PDF(Pubmed)
Abstract：
Microbial fuel cells (MFCs) have the potential to directly convert the chemical energy in organic matter into electrical energy, making them a promising technology for achieving sustainable energy production alongside wastewater treatment. However, the low extracellular electron transfer (EET) rates and limited bacteria loading capacity of MFCs anode materials present challenges in achieving high power output. In this study, three-dimensionally heteroatom-doped carbonized grape (CG) monoliths with a macroporous structure were successfully fabricated using a facile and low-cost route and employed as independent anodes in MFCs for treating brewery wastewater. The CG obtained at 900 °C (CG-900) exhibited excellent biocompatibility. When integrated into MFCs, these units initiated electricity generation a mere 1.8 days after inoculation and swiftly reached a peak output voltage of 658 mV, demonstrating an exceptional areal power density of 3.71 W m-2. The porous structure of the CG-900 anode facilitated efficient ion transport and microbial community succession, ensuring sustained operational excellence. Remarkably, even when nutrition was interrupted for 30 days, the voltage swiftly returned to its original level. Moreover, the CG-900 anode exhibited a superior capacity for accommodating electricigens, boasting a notably higher abundance of Geobacter spp. (87.1%) compared to carbon cloth (CC, 63.0%). Most notably, when treating brewery wastewater, the CG-900 anode achieved a maximum power density of 3.52 W m-2, accompanied by remarkable treatment efficiency, with a COD removal rate of 85.5%. This study provides a facile and low-cost synthesis technique for fabricating high-performance MFC anodes for use in microbial energy harvesting.
摘要：
微生物燃料电池(MFCs)具有将有机物中的化学能直接转化为电能的潜能,使它们成为与废水处理一起实现可持续能源生产的有前途的技术。然而,MFC阳极材料的低细胞外电子转移(EET)速率和有限的细菌负载能力在实现高功率输出方面提出了挑战。在这项研究中,使用简便且低成本的路线成功制造了具有大孔结构的三维杂原子掺杂碳化葡萄（CG）整体料，并将其用作MFC中的独立阳极，用于处理啤酒废水。在900°C下获得的CG（CG-900）表现出优异的生物相容性。当集成到MFC中时，这些单位在接种后仅1.8天就开始发电，并迅速达到658mV的峰值输出电压，证明了3.71Wm-2的特殊面积功率密度。CG-900阳极的多孔结构促进了有效的离子传输和微生物群落演替，确保持续的卓越运营。值得注意的是,即使营养中断了30天，电压迅速恢复到原来的水平。此外，CG-900阳极表现出优异的容纳电原的能力，拥有明显较高的Geobacterspp。(87.1%)与碳布(CC，63.0%）。最值得注意的是,在处理啤酒废水时，CG-900阳极的最大功率密度为3.52Wm-2，处理效率高，COD去除率为85.5%。这项研究提供了一种简便且低成本的合成技术，用于制造用于微生物能量收集的高性能MFC阳极。
