Effects of an applied voltage on direct interspecies electron transfer via conductive materials for methane production

Jung Yeol Lee, Jeong Hoon Park, Hee-Deung Park

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Direct interspecies electron transfer (DIET) between exoelectrogenic bacteria and methanogenic archaea via conductive materials is reported as an efficient method to produce methane in anaerobic organic waste digestion. A voltage can be applied to the conductive materials to accelerate the DIET between two groups of microorganisms to produce methane. To evaluate this hypothesis, two sets of anaerobic serum bottles with and without applied voltage were used with a pair of graphite rods as conductive materials to facilitate DIET. Initially, the methane production rate was similar between the two sets of serum bottles, and later the serum bottles with an applied voltage of 0.39. V showed a 168% higher methane production rate than serum bottles without an applied voltage. In cyclic voltammograms, the characteristic redox peaks for hydrogen and acetate oxidation were identified in the serum bottles with an applied voltage. In the microbial community analyses, hydrogenotrophic methanogens (e.g. Methanobacterium) were observed to be abundant in serum bottles with an applied voltage, while methanogens utilizing carbon dioxide (e.g., Methanosaeta and Methanosarcina) were dominant in serum bottles without an applied voltage. Taken together, the applied voltage on conductive materials might not be effective to promote DIET in methane production. Instead, it appeared to generate a condition for hydrogenotrophic methanogenesis.

Original languageEnglish
JournalWaste Management
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

Methane
serum
methane
Electrons
electron
Serum
Methanosarcina
Methanobacterium
Graphite
Archaea
methanogenesis
material
effect
Carbon Dioxide
graphite
Oxidation-Reduction
digestion
Digestion
microbial community
Hydrogen

Keywords

  • Anaerobic digestion
  • Direct interspecies electron transfer
  • Methanobacterium
  • Methanogenesis
  • Methanosaeta

ASJC Scopus subject areas

  • Waste Management and Disposal

Cite this

@article{147a7c1818ee48848f45d80333ca072e,
title = "Effects of an applied voltage on direct interspecies electron transfer via conductive materials for methane production",
abstract = "Direct interspecies electron transfer (DIET) between exoelectrogenic bacteria and methanogenic archaea via conductive materials is reported as an efficient method to produce methane in anaerobic organic waste digestion. A voltage can be applied to the conductive materials to accelerate the DIET between two groups of microorganisms to produce methane. To evaluate this hypothesis, two sets of anaerobic serum bottles with and without applied voltage were used with a pair of graphite rods as conductive materials to facilitate DIET. Initially, the methane production rate was similar between the two sets of serum bottles, and later the serum bottles with an applied voltage of 0.39. V showed a 168{\%} higher methane production rate than serum bottles without an applied voltage. In cyclic voltammograms, the characteristic redox peaks for hydrogen and acetate oxidation were identified in the serum bottles with an applied voltage. In the microbial community analyses, hydrogenotrophic methanogens (e.g. Methanobacterium) were observed to be abundant in serum bottles with an applied voltage, while methanogens utilizing carbon dioxide (e.g., Methanosaeta and Methanosarcina) were dominant in serum bottles without an applied voltage. Taken together, the applied voltage on conductive materials might not be effective to promote DIET in methane production. Instead, it appeared to generate a condition for hydrogenotrophic methanogenesis.",
keywords = "Anaerobic digestion, Direct interspecies electron transfer, Methanobacterium, Methanogenesis, Methanosaeta",
author = "Lee, {Jung Yeol} and Park, {Jeong Hoon} and Hee-Deung Park",
year = "2017",
doi = "10.1016/j.wasman.2017.07.025",
language = "English",
journal = "Waste Management",
issn = "0956-053X",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Effects of an applied voltage on direct interspecies electron transfer via conductive materials for methane production

AU - Lee, Jung Yeol

AU - Park, Jeong Hoon

AU - Park, Hee-Deung

PY - 2017

Y1 - 2017

N2 - Direct interspecies electron transfer (DIET) between exoelectrogenic bacteria and methanogenic archaea via conductive materials is reported as an efficient method to produce methane in anaerobic organic waste digestion. A voltage can be applied to the conductive materials to accelerate the DIET between two groups of microorganisms to produce methane. To evaluate this hypothesis, two sets of anaerobic serum bottles with and without applied voltage were used with a pair of graphite rods as conductive materials to facilitate DIET. Initially, the methane production rate was similar between the two sets of serum bottles, and later the serum bottles with an applied voltage of 0.39. V showed a 168% higher methane production rate than serum bottles without an applied voltage. In cyclic voltammograms, the characteristic redox peaks for hydrogen and acetate oxidation were identified in the serum bottles with an applied voltage. In the microbial community analyses, hydrogenotrophic methanogens (e.g. Methanobacterium) were observed to be abundant in serum bottles with an applied voltage, while methanogens utilizing carbon dioxide (e.g., Methanosaeta and Methanosarcina) were dominant in serum bottles without an applied voltage. Taken together, the applied voltage on conductive materials might not be effective to promote DIET in methane production. Instead, it appeared to generate a condition for hydrogenotrophic methanogenesis.

AB - Direct interspecies electron transfer (DIET) between exoelectrogenic bacteria and methanogenic archaea via conductive materials is reported as an efficient method to produce methane in anaerobic organic waste digestion. A voltage can be applied to the conductive materials to accelerate the DIET between two groups of microorganisms to produce methane. To evaluate this hypothesis, two sets of anaerobic serum bottles with and without applied voltage were used with a pair of graphite rods as conductive materials to facilitate DIET. Initially, the methane production rate was similar between the two sets of serum bottles, and later the serum bottles with an applied voltage of 0.39. V showed a 168% higher methane production rate than serum bottles without an applied voltage. In cyclic voltammograms, the characteristic redox peaks for hydrogen and acetate oxidation were identified in the serum bottles with an applied voltage. In the microbial community analyses, hydrogenotrophic methanogens (e.g. Methanobacterium) were observed to be abundant in serum bottles with an applied voltage, while methanogens utilizing carbon dioxide (e.g., Methanosaeta and Methanosarcina) were dominant in serum bottles without an applied voltage. Taken together, the applied voltage on conductive materials might not be effective to promote DIET in methane production. Instead, it appeared to generate a condition for hydrogenotrophic methanogenesis.

KW - Anaerobic digestion

KW - Direct interspecies electron transfer

KW - Methanobacterium

KW - Methanogenesis

KW - Methanosaeta

UR - http://www.scopus.com/inward/record.url?scp=85025105862&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85025105862&partnerID=8YFLogxK

U2 - 10.1016/j.wasman.2017.07.025

DO - 10.1016/j.wasman.2017.07.025

M3 - Article

JO - Waste Management

JF - Waste Management

SN - 0956-053X

ER -