Strengthening the direct interspecies electron transfer (DIET) is an effective strategy to improve the performance of anaerobic digestion (AD) process. In this study, the polyaniline functionated activated carbon (AC-PANi) was prepared by chemical oxidative polymerization. This material possessed pseudo-capacitance properties as well as excellent charge transfer capability. The experimental results demonstrated that the incorporation of AC-PANi in AD process could efficiently increase the chemical oxygen demand (COD) removal (18.6 %) and daily methane production rate (35.3 %). The AC-PANi can also act as an extracellular acceptor to promote the synthesis of adenosine triphosphate (ATP) and secretion of extracellular enzymes as well as cytochrome (Cyt-C). The content of coenzyme F on methanogens was also shown to be increased by 60.9 % with the addition of AC-PANi in AD reactor. Overall, this work provides an easy but feasible way to enhance AD performance by promoting DIET between acetate-producing bacteria and methanogens.

中文翻译：

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通过超级电容器材料增强厌氧过程中的电子转移：聚苯胺功能活性炭


加强直接种间电子转移（DIET）是提高厌氧消化（AD）过程性能的有效策略。本研究通过化学氧化聚合制备了聚苯胺功能活性炭（AC-PANi）。该材料具有赝电容特性以及优异的电荷传输能力。实验结果表明，在AD过程中加入AC-PANi可以有效提高化学需氧量（COD）去除率（18.6％）和日甲烷产量（35.3％）。 AC-PANi还可以作为细胞外受体，促进三磷酸腺苷（ATP）的合成和细胞外酶以及细胞色素（Cyt-C）的分泌。 AD反应器中添加AC-PANi后，产甲烷菌中辅酶F的含量也增加了60.9%。总体而言，这项工作提供了一种简单但可行的方法，通过促进产乙酸菌和产甲烷菌之间的饮食来增强 AD 性能。