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https://hdl.handle.net/20.500.14094/90005012
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2024-03-29
18:36 集計
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90005012 (fulltext)
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メタデータID
90005012
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open access
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タイトル
Changes in the microbial consortium during dark hydrogen fermentation in a bioelectrochemical system increases methane production during a two-stage process
著者
Sasaki, Kengo ; Sasaki, Daisuke ; Tsuge, Yota ; Morita, Masahiko ; Kondo, Akihiko
著者ID
A0278
研究者ID
1000050558301
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/profile/ja.543788ae48fc1b54520e17560c007669.html
著者名
Sasaki, Kengo
佐々木, 建吾
ササキ, ケンゴ
所属機関名
科学技術イノベーション研究科
著者ID
A0276
研究者ID
1000000650615
著者名
Sasaki, Daisuke
佐々木, 大介
ササキ, ダイスケ
所属機関名
科学技術イノベーション研究科
著者名
Tsuge, Yota
著者名
Morita, Masahiko
著者ID
A1715
研究者ID
1000040205547
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/profile/ja.a324eb4a1b052e53520e17560c007669.html
著者名
Kondo, Akihiko
近藤, 昭彦
コンドウ, アキヒコ
所属機関名
科学技術イノベーション研究科
収録物名
Biotechnology for Biofuels
巻(号)
11
ページ
173-173
出版者
BioMed Central
刊行日
2018-06-22
公開日
2018-07-11
抄録
Background: Bioelectrochemical systems (BESs) are an innovative technology developed to influence conventional anaerobic digestion. We examined the feasibility of applying a BES to dark hydrogen fermentation and its effects on a two-stage fermentation process comprising hydrogen and methane production. The BES used low-cost, low-reactivity carbon sheets as the cathode and anode, and the cathodic potential was controlled at - 1.0 V (vs. Ag/AgCl) with a potentiostat. The operation used 10 g/L glucose as the major carbon source. Results: The electric current density was low throughout (0.30-0.88 A/m(2) per electrode corresponding to 0.5-1.5 mM/day of hydrogen production) and water electrolysis was prevented. At a hydraulic retention time of 2 days with a substrate pH of 6.5, the BES decreased gas production (hydrogen and carbon dioxide contents: 52.1 and 47.1%, respectively), compared to the non-bioelectrochemical system (NBES), although they had similar gas compositions. In addition, a methane fermenter (MF) was applied after the BES, which increased gas production (methane and carbon dioxide contents: 85.1 and 14.9%, respectively) compared to the case when the MF was applied after the NBES. Meta 16S rRNA sequencing revealed that the BES accelerated the growth of Ruminococcus sp. and Veillonellaceae sp. and decreased Clostridium sp. and Thermoanaerobacterium sp., resulting in increased propionate and ethanol generation and decreased butyrate generation; however, unknowingly, acetate generation was increased in the BES. Conclusions: The altered redox potential in the BES likely transformed the structure of the microbial consortium and metabolic pattern to increase methane production and decrease carbon dioxide production in the two-stage process. This study showed the utility of the BES to act on the microbial consortium, resulting in improved gas production from carbohydrate compounds.
キーワード
Bioelectrochemical system
Dark fermentation
Hydrogen
Methane
Microbial consortium
Two-stage process
カテゴリ
科学技術イノベーション研究科
学術雑誌論文
権利
© The Author(s) 2018.
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
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資源タイプ
journal article
言語
English (英語)
eISSN
1754-6834
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関連情報
DOI
https://doi.org/10.1186/s13068-018-1175-z
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