A bioelectrochemical upflow anaerobic sludge blanket (BE-UASB) was constructed and compared with the traditional UASB to investigate the role of bioelectrocatalysis in modulating methanogenesis and sulfidogensis involved within anaerobic treatment of high-sulfate methanolic wastewater (COD/SO ratio ≤ 2). Methane production rate for BE-UASB was 1.4 times higher than that of the single UASB, while SO removal stabilized at 16.7%. Bioelectrocatalysis selectively enriched key functional anaerobes and stimulated the secretion of extracellular polymeric substances, especially humic acids favoring electron transfer, thereby accelerating the electroactive biofilms development of electrodes. was the dominant genus (35%) to directly convert methanol to CH. as CO electroreduction methane-producing archaea appeared only on electrodes. exhibited anode-dependence, which provided acetate for sulfate-reducing bacteria ( and ) through synergistic coexistence. This study confirmed that BE-UASB regulated the microbial ecology to achieve efficient removal and energy recovery of high-sulfate methanolic wastewater.

中文翻译：

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生物电化学改变上流式厌氧污泥床中的微生物生态，以增强高硫酸盐甲醇废水的产甲烷作用


构建了生物电化学上流式厌氧污泥床（BE-UASB），并与传统的 UASB 进行比较，研究生物电催化在调节高硫酸盐甲醇废水（COD/SO 比≤ 2）厌氧处理中产甲烷和硫化过程中的作用。 BE-UASB的甲烷产率比单一UASB高1.4倍，而SO去除率稳定在16.7%。生物电催化选择性富集关键功能厌氧菌，刺激细胞外聚合物的分泌，特别是有利于电子转移的腐殖酸，从而加速电极电活性生物膜的形成。是直接将甲醇转化为 CH 的优势属 (35%)。因为CO电还原产生甲烷的古细菌只出现在电极上。表现出阳极依赖性，通过协同共存为硫酸盐还原菌（和）提供乙酸盐。本研究证实BE-UASB通过调节微生物生态实现高硫酸盐甲醇废水的高效去除和能量回收。