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首页> 外文期刊>Environmental Science & Technology >Hydrochar-Facilitated Anaerobic Digestion: Evidence for Direct Interspecies Electron Transfer Mediated through Surface Oxygen-Containing Functional Groups
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Hydrochar-Facilitated Anaerobic Digestion: Evidence for Direct Interspecies Electron Transfer Mediated through Surface Oxygen-Containing Functional Groups

机译：烃类促进的厌氧消化：通过表面含氧官能团介导的直接种间电子转移的证据。

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摘要

Acceleration of the anaerobic digestion (AD) process is crucial to achieving energy-efficient recycling of organic wastes. Hydrochar is produced by hydrothermal liquefaction of biomass, yet its application in the AD process is rarely reported. The present study showed that sewage sludge-derived hydrochar (SH) enhanced the methane production rate of glucose by 37%. SH increased the methane production rate from acetate but did not affect acidification and the methane production rate from H_2/CO_2- SH enhanced hydrogenotrophic methanogenesis, which could be due to direct interspecies electron transfer (DIET) by converting H~+, e~-, and CO_2 to methane. Trichococcus and Methanosaeta were dominant in the AD process with SH. Label-free proteomic analysis showed Methanosaeta was involved in DIET as reflected by the up-regulation of proteins involved in hydrogenotrophic methanogenesis. Hydrochars derived from corn straw (CH), Enteromorpha algae (EH), and poplar wood (PH), as well as activated carbon (AC), were also tested in the AD process. SH, CH, and EH obviously increased the methane production rates, which were 39%, 15%, and 20% higher than the control experiment, respectively. It was neither electrical conductivity nor the total redox property of hydrochars and AC but the abundances of surface oxygen-containing functional groups that correlated to the methane production rates.
机译：加速厌氧消化（AD）过程对于实现高能效的有机废物回收至关重要。 Hydrochar是由生物质的水热液化产生的，但很少在AD工艺中应用。本研究表明，污水污泥衍生的碳氢化合物（SH）使葡萄糖的甲烷生成率提高了37％。 SH增加了乙酸盐产生的甲烷的产率，但没有影响酸化作用，H_2 / CO_2- SH产生的甲烷的产量提高了氢营养型甲烷生成的能力，这可能是由于通过转换H〜+，e〜-，直接种间电子转移（DIET）和CO_2转化为甲烷。毛球菌和甲烷菌在SH的AD过程中占主导地位。无标记蛋白质组学分析表明，甲烷菌参与了DIET，这反映在氢营养型甲烷生成中涉及的蛋白质上调。还从AD流程中测试了源自玉米秸秆（CH），Enteromorpha海藻（EH）和杨木（PH）以及活性炭（AC）的水炭。 SH，CH和EH明显提高了甲烷生成率，分别比对照实验高39％，15％和20％。既不是电导率也不是烃和AC的总氧化还原特性，而是与甲烷产生速率相关的表面含氧官能团的丰度。

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  • 来源
    《Environmental Science & Technology》 |2020年第9期|5755-5766|共12页
  • 作者

    Shuang Ren; Muhammad Usman; Daniel C. W. Tsang; Sompong O-Thong; Irini Angelidaki; Xiangdong Zhu; Shicheng Zhang; Gang Luo;

  • 作者单位

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Shanghai 200438 China;

    Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Kowloon Hong Kong China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Shanghai 200438 China Department of Biology Faculty of Science Thaksin University Phathalung 93110 Thailand;

    Department of Environmental Engineering Technical University of Denmark DK-2800 Kgs Lyngby Denmark;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Shanghai 200438 China Shanghai Technical Service Platform for Pollution Control and Resource Utilization of Organic Wastes Shanghai 200438 China;

    Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Shanghai 200438 China Shanghai Technical Service Platform for Pollution Control and Resource Utilization of Organic Wastes Shanghai 200438 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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