In the innovative realm of green energy solutions, plant microbial fuel cells (PMFCs) have emerged as a promising frontier, embodying a greener technological approach. However, PMFC is not yet viable for large-scale application due to its low voltage generation. This study explores the integration of PMFC technology in paddy field, using activated biochar as electrode material to enhance voltage production while reducing methane emission. According to the findings, rice PMFCs equipped with activated biochar achieved the highest power density, reaching an impressive 106.67 mW m of anode area, significantly outperforming SMFCs, which peaked at 38.28 mW m when integrated with a biochar anode. Additionally, rice-PMFCs emitted 38 % less methane than the normal rice plant, while the reduction was 27.1 % for rice plants equipped with activated biochar, with no significant change in plant yield observed. Furthermore, PMFCs reduced greenhouse gas emissions by 70 % and 67 % compared to traditional coal and natural gas-based power plants, respectively. In summary, activated biochar shows promise as a potent alternative to traditional graphite electrodes in PMFCs.

中文翻译：

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增强稻田生物发电并减少甲烷排放：在植物微生物燃料电池中使用活性生物炭的新方法

在绿色能源解决方案的创新领域，植物微生物燃料电池（PMFC）已成为一个有前途的前沿领域，体现了一种更绿色的技术方法。然而，由于PMFC产生的电压较低，尚不适合大规模应用。本研究探索了PMFC技术在稻田中的集成，使用活性生物炭作为电极材料来提高电压产生，同时减少甲烷排放。研究结果显示，配备活性生物炭的稻米 PMFC 实现了最高的功率密度，阳极面积达到了令人印象深刻的 106.67 mW m2，明显优于 SMFC，在与生物炭阳极集成时，SMFC 的峰值功率为 38.28 mW m2。此外，水稻-PMFC 的甲烷排放量比普通水稻少 38%，而配备活性生物炭的水稻则减少了 27.1%，但植物产量没有明显变化。此外，与传统燃煤发电厂和天然气发电厂相比，PMFC 分别减少了 70% 和 67% 的温室气体排放。总之，活性生物炭有望成为 PMFC 中传统石墨电极的有效替代品。