极化电极增强了上流式厌氧生物电化学反应器中甲烷生产的生物直接种间电子传递。
Polarized electrode enhances biological direct interspecies electron transfer for methane production in upflow anaerobic bioelectrochemical reactor.
机构信息
School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Department of Environmental Engineering, Korea Maritime and Ocean University, Busan, 49112, South Korea.
出版信息
Chemosphere. 2018 Aug;204:186-192. doi: 10.1016/j.chemosphere.2018.03.163. Epub 2018 Mar 24.
The influence of polarized electrodes on the methane production, which depends on the sludge concentration, was investigated in upflow anaerobic bioelectrochemical (UABE) reactor. When the polarized electrode was placed in the bottom zone with a high sludge concentration, the methane production was 5.34 L/L.d, which was 53% higher than upflow anaerobic sludge blanket (UASB) reactor. However, the methane production was reduced to 4.34 L/L.d by placing the electrode in the upper zone of the UABE reactor with lower sludge concentration. In the UABE reactor, the methane production was mainly improved by the enhanced biological direct interspecies electron transfer (bDIET) pathway, and the methane production via the electrode was a minor fraction of less than 4% of total methane production. The polarized electrodes that placed in the bottom zone with a high sludge concentration enhance the bDIET for methane production in the UABE reactor and greatly improve the methane production.
在上流式厌氧生物电化学（UABE）反应器中，研究了极化电极对甲烷产量的影响，这取决于污泥浓度。当极化电极放置在污泥浓度较高的底部区域时，甲烷产量为 5.34 L/L.d，比上流式厌氧污泥床（UASB）反应器高出 53%。然而，当将电极放置在 UABE 反应器中污泥浓度较低的上部区域时，甲烷产量降低至 4.34 L/L.d。在 UABE 反应器中，甲烷产量主要通过增强的生物直接种间电子转移（bDIET）途径得到提高，而通过电极产生的甲烷仅占总产量的不到 4%，是次要部分。将极化电极放置在污泥浓度较高的底部区域可增强 UABE 反应器中甲烷产生的 bDIET，从而大大提高甲烷产量。
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