The biocathode of microbial electrochemical systems and microbially-influenced corrosion

Byung Hong Kim, Swee Su Lim, Wan Ramli Wan Daud, Geoffrey Michael Gadd, In Seop Chang

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The cathode reaction is one of the most important limiting factors in bioelectrochemical systems even with precious metal catalysts. Since aerobic bacteria have a much higher affinity for oxygen than any known abiotic cathode catalysts, the performance of a microbial fuel cell can be improved through the use of electrochemically-active oxygen-reducing bacteria acting as the cathode catalyst. These consume electrons available from the electrode to reduce the electron acceptors present, probably conserving energy for growth. Anaerobic bacteria reduce protons to hydrogen in microbial electrolysis cells (MECs). These aerobic and anaerobic bacterial activities resemble those catalyzing microbially-influenced corrosion (MIC). Sulfate-reducing bacteria and homoacetogens have been identified in MEC biocathodes. For sustainable operation, microbes in a biocathode should conserve energy during such electron-consuming reactions probably by similar mechanisms as those occurring in MIC. A novel hypothesis is proposed here which explains how energy can be conserved by microbes in MEC biocathodes.

Original languageEnglish
Pages (from-to)395-401
Number of pages7
JournalBioresource Technology
Volume190
DOIs
Publication statusPublished - 1 Aug 2015

Fingerprint

Regenerative fuel cells
corrosion
electrokinesis
Bacteria
Cathodes
catalyst
Corrosion
electron
Catalysts
bacterium
Electrons
Aerobic bacteria
energy
Microbial fuel cells
oxygen
Oxygen
precious metal
sulfate-reducing bacterium
fuel cell
Precious metals

Keywords

  • Biocathode
  • Bioelectrochemical systems
  • Energy conservation
  • Microbial electrolysis cells
  • Microbially-influenced corrosion

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

The biocathode of microbial electrochemical systems and microbially-influenced corrosion. / Kim, Byung Hong; Lim, Swee Su; Wan Daud, Wan Ramli; Gadd, Geoffrey Michael; Chang, In Seop.

In: Bioresource Technology, Vol. 190, 01.08.2015, p. 395-401.

Research output: Contribution to journalArticle

Kim, Byung Hong ; Lim, Swee Su ; Wan Daud, Wan Ramli ; Gadd, Geoffrey Michael ; Chang, In Seop. / The biocathode of microbial electrochemical systems and microbially-influenced corrosion. In: Bioresource Technology. 2015 ; Vol. 190. pp. 395-401.
@article{7533171b738a4505a26ceafea8d9b9bd,
title = "The biocathode of microbial electrochemical systems and microbially-influenced corrosion",
abstract = "The cathode reaction is one of the most important limiting factors in bioelectrochemical systems even with precious metal catalysts. Since aerobic bacteria have a much higher affinity for oxygen than any known abiotic cathode catalysts, the performance of a microbial fuel cell can be improved through the use of electrochemically-active oxygen-reducing bacteria acting as the cathode catalyst. These consume electrons available from the electrode to reduce the electron acceptors present, probably conserving energy for growth. Anaerobic bacteria reduce protons to hydrogen in microbial electrolysis cells (MECs). These aerobic and anaerobic bacterial activities resemble those catalyzing microbially-influenced corrosion (MIC). Sulfate-reducing bacteria and homoacetogens have been identified in MEC biocathodes. For sustainable operation, microbes in a biocathode should conserve energy during such electron-consuming reactions probably by similar mechanisms as those occurring in MIC. A novel hypothesis is proposed here which explains how energy can be conserved by microbes in MEC biocathodes.",
keywords = "Biocathode, Bioelectrochemical systems, Energy conservation, Microbial electrolysis cells, Microbially-influenced corrosion",
author = "Kim, {Byung Hong} and Lim, {Swee Su} and {Wan Daud}, {Wan Ramli} and Gadd, {Geoffrey Michael} and Chang, {In Seop}",
year = "2015",
month = "8",
day = "1",
doi = "10.1016/j.biortech.2015.04.084",
language = "English",
volume = "190",
pages = "395--401",
journal = "Bioresource Technology",
issn = "0960-8524",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - The biocathode of microbial electrochemical systems and microbially-influenced corrosion

AU - Kim, Byung Hong

AU - Lim, Swee Su

AU - Wan Daud, Wan Ramli

AU - Gadd, Geoffrey Michael

AU - Chang, In Seop

PY - 2015/8/1

Y1 - 2015/8/1

N2 - The cathode reaction is one of the most important limiting factors in bioelectrochemical systems even with precious metal catalysts. Since aerobic bacteria have a much higher affinity for oxygen than any known abiotic cathode catalysts, the performance of a microbial fuel cell can be improved through the use of electrochemically-active oxygen-reducing bacteria acting as the cathode catalyst. These consume electrons available from the electrode to reduce the electron acceptors present, probably conserving energy for growth. Anaerobic bacteria reduce protons to hydrogen in microbial electrolysis cells (MECs). These aerobic and anaerobic bacterial activities resemble those catalyzing microbially-influenced corrosion (MIC). Sulfate-reducing bacteria and homoacetogens have been identified in MEC biocathodes. For sustainable operation, microbes in a biocathode should conserve energy during such electron-consuming reactions probably by similar mechanisms as those occurring in MIC. A novel hypothesis is proposed here which explains how energy can be conserved by microbes in MEC biocathodes.

AB - The cathode reaction is one of the most important limiting factors in bioelectrochemical systems even with precious metal catalysts. Since aerobic bacteria have a much higher affinity for oxygen than any known abiotic cathode catalysts, the performance of a microbial fuel cell can be improved through the use of electrochemically-active oxygen-reducing bacteria acting as the cathode catalyst. These consume electrons available from the electrode to reduce the electron acceptors present, probably conserving energy for growth. Anaerobic bacteria reduce protons to hydrogen in microbial electrolysis cells (MECs). These aerobic and anaerobic bacterial activities resemble those catalyzing microbially-influenced corrosion (MIC). Sulfate-reducing bacteria and homoacetogens have been identified in MEC biocathodes. For sustainable operation, microbes in a biocathode should conserve energy during such electron-consuming reactions probably by similar mechanisms as those occurring in MIC. A novel hypothesis is proposed here which explains how energy can be conserved by microbes in MEC biocathodes.

KW - Biocathode

KW - Bioelectrochemical systems

KW - Energy conservation

KW - Microbial electrolysis cells

KW - Microbially-influenced corrosion

UR - http://www.scopus.com/inward/record.url?scp=84930178434&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84930178434&partnerID=8YFLogxK

U2 - 10.1016/j.biortech.2015.04.084

DO - 10.1016/j.biortech.2015.04.084

M3 - Article

C2 - 25976915

AN - SCOPUS:84930178434

VL - 190

SP - 395

EP - 401

JO - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

ER -