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Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion

Interspecies electron transfer is a fundamental factor determining the efficiency of anaerobic digestion (AD), which involves syntrophy between fermentative bacteria and methanogens. Direct interspecies electron transfer (DIET) induced by conductive materials can optimize this process offering a sig...

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Detalles Bibliográficos
Autores principales: Lin, Richen, Deng, Chen, Cheng, Jun, Xia, Ao, Lens, Piet N.L., Jackson, Stephen A., Dobson, Alan D.W., Murphy, Jerry D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282454/
https://www.ncbi.nlm.nih.gov/pubmed/30528903
http://dx.doi.org/10.1016/j.isci.2018.11.030
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author Lin, Richen
Deng, Chen
Cheng, Jun
Xia, Ao
Lens, Piet N.L.
Jackson, Stephen A.
Dobson, Alan D.W.
Murphy, Jerry D.
author_facet Lin, Richen
Deng, Chen
Cheng, Jun
Xia, Ao
Lens, Piet N.L.
Jackson, Stephen A.
Dobson, Alan D.W.
Murphy, Jerry D.
author_sort Lin, Richen
collection PubMed
description Interspecies electron transfer is a fundamental factor determining the efficiency of anaerobic digestion (AD), which involves syntrophy between fermentative bacteria and methanogens. Direct interspecies electron transfer (DIET) induced by conductive materials can optimize this process offering a significant improvement over indirect electron transfer. Herein, conductive graphene was applied in the AD of protein-derived glycine to establish DIET. The electron-producing reaction via DIET is thermodynamically more favorable and exhibits a more negative Gibbs free energy value (−60.0 kJ/mol) than indirect hydrogen transfer (−33.4 kJ/mol). The Gompertz model indicated that the kinetic parameters exhibited linear correlations with graphene addition from 0.25 to 1.0 g/L, leading to the highest increase in peak biomethane production rate of 28%. Sedimentibacter (7.8% in abundance) and archaea Methanobacterium (71.1%) and Methanosarcina (11.3%) might be responsible for DIET. This research can open up DIET to a range of protein-rich substrates, such as algae.
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spelling pubmed-62824542018-12-13 Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion Lin, Richen Deng, Chen Cheng, Jun Xia, Ao Lens, Piet N.L. Jackson, Stephen A. Dobson, Alan D.W. Murphy, Jerry D. iScience Article Interspecies electron transfer is a fundamental factor determining the efficiency of anaerobic digestion (AD), which involves syntrophy between fermentative bacteria and methanogens. Direct interspecies electron transfer (DIET) induced by conductive materials can optimize this process offering a significant improvement over indirect electron transfer. Herein, conductive graphene was applied in the AD of protein-derived glycine to establish DIET. The electron-producing reaction via DIET is thermodynamically more favorable and exhibits a more negative Gibbs free energy value (−60.0 kJ/mol) than indirect hydrogen transfer (−33.4 kJ/mol). The Gompertz model indicated that the kinetic parameters exhibited linear correlations with graphene addition from 0.25 to 1.0 g/L, leading to the highest increase in peak biomethane production rate of 28%. Sedimentibacter (7.8% in abundance) and archaea Methanobacterium (71.1%) and Methanosarcina (11.3%) might be responsible for DIET. This research can open up DIET to a range of protein-rich substrates, such as algae. Elsevier 2018-11-22 /pmc/articles/PMC6282454/ /pubmed/30528903 http://dx.doi.org/10.1016/j.isci.2018.11.030 Text en © 2018 The Author(s) http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Lin, Richen
Deng, Chen
Cheng, Jun
Xia, Ao
Lens, Piet N.L.
Jackson, Stephen A.
Dobson, Alan D.W.
Murphy, Jerry D.
Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion
title Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion
title_full Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion
title_fullStr Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion
title_full_unstemmed Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion
title_short Graphene Facilitates Biomethane Production from Protein-Derived Glycine in Anaerobic Digestion
title_sort graphene facilitates biomethane production from protein-derived glycine in anaerobic digestion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282454/
https://www.ncbi.nlm.nih.gov/pubmed/30528903
http://dx.doi.org/10.1016/j.isci.2018.11.030
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