不同电子传递途径对厌氧消化耦合生物电化学系统产甲烷贡献的分析。
Contribution analysis of different electron transfer pathways to methane production in anaerobic digestion coupled with bioelectrochemical system.
机构信息
College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
出版信息
Sci Total Environ. 2022 Nov 25;849:157745. doi: 10.1016/j.scitotenv.2022.157745. Epub 2022 Jul 31.
The contribution analysis of different electron transfer pathways to CH production was investigated in bioelectrochemical anaerobic digestion (BEAD). It demonstrates that the indirect interspecies electron transfer (IIET) pathway and the direct interspecies electron transfer (DIET) pathways contributed to 41.7 % and 58.3 % of the CH production in the BEAD reactor, respectively. The DIET pathway was further divided into DIET via electrode (eDIET) and biological DIET (bDIET) in the bulk solution, and contributed 11.1 % and 47.2 % of CH production, respectively. This indicates that the dominant electron transfer pathway for CH production is from the bulk solution, rather than on the polarized electrode. The electroactive microorganisms were well enriched in the bulk solution by the electric field generated between anode and cathode. The enriched electroactive microorganisms significantly improved the CH production in the bulk solution through the bDIET pathway.
研究了生物电化学厌氧消化（BEAD）中不同电子传递途径对 CH 生成的贡献。结果表明，间接种间电子转移（IIET）途径和直接种间电子转移（DIET）途径分别为 BEAD 反应器中 CH 生成的 41.7%和 58.3%。DIET 途径进一步分为通过电极的 DIET（eDIET）和在本体溶液中的生物 DIET（bDIET），分别贡献了 11.1%和 47.2%的 CH 生成。这表明 CH 生成的主要电子传递途径是从本体溶液，而不是在极化电极上。通过在阳极和阴极之间产生的电场，电活性微生物在本体溶液中得到了很好的富集。通过 bDIET 途径，富集的电活性微生物显著提高了本体溶液中的 CH 生成。
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