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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2018
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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. |
format | Online Article Text |
id | pubmed-6282454 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
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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