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首页> 外文期刊>RSC Advances >Composition and role of the attached and planktonic microbial communities in mesophilic and thermophilic xylose-fed microbial fuel cells
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Composition and role of the attached and planktonic microbial communities in mesophilic and thermophilic xylose-fed microbial fuel cells

机译：嗜苯胺和嗜热木糖喂养的微生物燃料电池中附着和浮游微生物群落的组成和作用

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摘要

A mesophilic (37 degrees C) and a thermophilic (55 degrees C) two-chamber microbial fuel cell (MFC) were studied and compared for their power production from xylose and the microbial communities involved. The anodeattached, membrane-attached, and planktonic microbial communities, and their respective active subpopulations, were determined by next generation sequencing (Illumina MiSeq), based on the presence and expression of the 16S rRNA gene. Geobacteraceae accounted for 65% of the anodeattached active microbial community in the mesophilic MFC, and were associated to electricity generation likely through direct electron transfer, resulting in the highest power production of 1.1 W m(-3). A lower maximum power was generated in the thermophilic MFC (0.2 W m(-3)), likely due to limited acetate oxidation and the competition for electrons by hydrogen oxidizing bacteria and hydrogenotrophic methanogenic archaea. Aerobic microorganisms, detected among the membraneattached active community in both the mesophilic and thermophilic MFC, likely acted as a barrier for oxygen flowing from the cathodic chamber through the membrane, favoring the strictly anaerobic exoelectrogenic microorganisms, but competing with them for xylose and its degradation products. This study provides novel information on the active microbial communities populating the anodic chamber of mesophilic and thermophilic xylose-fed MFCs, which may help in developing strategies to favor exoelectrogenic microorganisms at the expenses of competing microorganisms.
机译：研究了嗜热（37℃）和嗜热（55℃）的双室微生物燃料电池（MFC），并与涉及的微生物和微生物社区的电力产生相比。基于16S rRNA基因的存在和表达，通过下一代测序（Illumina miseq）测定AnodeataThed，膜附着和氏植物微生物群和它们各自的活性亚群。 Geobacteraceae占嗜培素MFC中的65％的AnodeatiChed活性微生物群落，并且通过直接电子转移可能与发电有关，导致1.1W m（-3）的最高功率产生。在嗜热MFC中产生较低的最大功率（0.2W m（-3）），可能由于乙酸盐氧化有限，通过氢氧化细菌和氢脱氢甲烷型古代电子竞争。在嗜渗嗜热和嗜热MFC中膜的活性群落中检测到的有氧微生物，可能作为从阴极室通过膜流动的氧气的屏障，优先于严格的厌氧的外部微生物，但与木糖和其降解产物竞争。该研究提供了有关填充嗜培素和嗜热木糖喂养的MFCs阳极室的活性微生物群体的新颖信息，这可能有助于在竞争微生物的费用下开发有利于外部微生物的策略。

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  • 来源
    《RSC Advances》 |2018年第6期|共12页
  • 作者

    Dessi Paolo; Porca Estefania; Haavisto Johanna; Lakaniemi Aino-Maija; Collins Gavin; Lens Piet N. L.;

  • 作者单位

    Tampere Univ Technol Lab Chem &

    Bioengn POB 541 FI-33101 Tampere Finland;

    Natl Univ Ireland Galway Sch Nat Sci Microbial Communities Lab Univ Rd Galway H91 TK33 Ireland;

    Tampere Univ Technol Lab Chem &

    Bioengn POB 541 FI-33101 Tampere Finland;

    Tampere Univ Technol Lab Chem &

    Bioengn POB 541 FI-33101 Tampere Finland;

    Natl Univ Ireland Galway Sch Nat Sci Microbial Communities Lab Univ Rd Galway H91 TK33 Ireland;

    Tampere Univ Technol Lab Chem &

    Bioengn POB 541 FI-33101 Tampere Finland;

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  • 正文语种 eng
  • 中图分类 化学;
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