Selective cathodic microbial biofilm retention allows a high current-to-sulfide efficiency in sulfate-reducing microbial electrolysis cells.
Identifieur interne : 000200 ( PubMed/Corpus ); précédent : 000199; suivant : 000201Selective cathodic microbial biofilm retention allows a high current-to-sulfide efficiency in sulfate-reducing microbial electrolysis cells.
Auteurs : Guillermo Pozo ; Yang Lu ; Sebastien Pongy ; Jürg Keller ; Pablo Ledezma ; Stefano FreguiaSource :
- Bioelectrochemistry (Amsterdam, Netherlands) [ 1878-562X ] ; 2017.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Nanotubes, Carbon, Sulfates, Sulfides.
- instrumentation : Electrolysis.
- metabolism : Bacteria, Sulfates, Sulfides.
- Biofilms, Electric Conductivity, Electrodes, Hydrogen-Ion Concentration.
Abstract
Selective microbial retention is of paramount importance for the long-term performance of cathodic sulfate reduction in microbial electrolysis cells (MECs) due to the slow growth rate of autotrophic sulfate-reducing bacteria. In this work, we investigate the biofilm retention and current-to-sulfide conversion efficiency using carbon granules (CG) or multi-wall carbon nanotubes deposited on reticulated vitreous carbon (MWCNT-RVC) as electrode materials. For ~2months, the MECs were operated at sulfate loading rates of 21 to 309gSO4 -S/m(2)/d. Although MWCNT-RVC achieved a current density of 57±11A/m(2), greater than the 32±9A/m(2) observed using CG, both materials exhibited similar sulfate reduction rates (SRR), with MWCNT-RVC reaching 104±16gSO4 -S/m(2)/d while 110±13gSO4 -S/m(2)/d were achieved with CG. Pyrosequencing analysis of the 16S rRNA at the end of experimentation revealed a core community dominated by Desulfovibrio (28%), Methanobacterium (19%) and Desulfomicrobium (14%), on the MWCNT-RVC electrodes. While a similar Desulfovibrio relative abundance of 29% was found in CG-biofilms, Desulfomicrobium was found to be significantly less abundant (4%) and Methanobacterium practically absent (0.2%) on CG electrodes. Surprisingly, our results show that CG can achieve higher current-to-sulfide efficiencies at lower power consumption than the nano-modified three-dimensional MWCNT-RVC.
DOI: 10.1016/j.bioelechem.2017.07.001
PubMed: 28719849
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pubmed:28719849Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Selective cathodic microbial biofilm retention allows a high current-to-sulfide efficiency in sulfate-reducing microbial electrolysis cells.</title><author><name sortKey="Pozo, Guillermo" sort="Pozo, Guillermo" uniqKey="Pozo G" first="Guillermo" last="Pozo">Guillermo Pozo</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia. Electronic address: g.pozozamora@awmc.uq.edu.au.</nlm:affiliation></affiliation></author><author><name sortKey="Lu, Yang" sort="Lu, Yang" uniqKey="Lu Y" first="Yang" last="Lu">Yang Lu</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Pongy, Sebastien" sort="Pongy, Sebastien" uniqKey="Pongy S" first="Sebastien" last="Pongy">Sebastien Pongy</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia; Département Génie Energétique et Environnement, INSA Lyon, 69621 Villeurbanne Cedex, France.</nlm:affiliation></affiliation></author><author><name sortKey="Keller, Jurg" sort="Keller, Jurg" uniqKey="Keller J" first="Jürg" last="Keller">Jürg Keller</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Ledezma, Pablo" sort="Ledezma, Pablo" uniqKey="Ledezma P" first="Pablo" last="Ledezma">Pablo Ledezma</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Freguia, Stefano" sort="Freguia, Stefano" uniqKey="Freguia S" first="Stefano" last="Freguia">Stefano Freguia</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2017">2017</date><idno type="RBID">pubmed:28719849</idno><idno type="pmid">28719849</idno><idno type="doi">10.1016/j.bioelechem.2017.07.001</idno><idno type="wicri:Area/PubMed/Corpus">000200</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000200</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Selective cathodic microbial biofilm retention allows a high current-to-sulfide efficiency in sulfate-reducing microbial electrolysis cells.</title><author><name sortKey="Pozo, Guillermo" sort="Pozo, Guillermo" uniqKey="Pozo G" first="Guillermo" last="Pozo">Guillermo Pozo</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia. Electronic address: g.pozozamora@awmc.uq.edu.au.</nlm:affiliation></affiliation></author><author><name sortKey="Lu, Yang" sort="Lu, Yang" uniqKey="Lu Y" first="Yang" last="Lu">Yang Lu</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Pongy, Sebastien" sort="Pongy, Sebastien" uniqKey="Pongy S" first="Sebastien" last="Pongy">Sebastien Pongy</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia; Département Génie Energétique et Environnement, INSA Lyon, 69621 Villeurbanne Cedex, France.</nlm:affiliation></affiliation></author><author><name sortKey="Keller, Jurg" sort="Keller, Jurg" uniqKey="Keller J" first="Jürg" last="Keller">Jürg Keller</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Ledezma, Pablo" sort="Ledezma, Pablo" uniqKey="Ledezma P" first="Pablo" last="Ledezma">Pablo Ledezma</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Freguia, Stefano" sort="Freguia, Stefano" uniqKey="Freguia S" first="Stefano" last="Freguia">Stefano Freguia</name><affiliation><nlm:affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Bioelectrochemistry (Amsterdam, Netherlands)</title><idno type="eISSN">1878-562X</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bacteria (metabolism)</term><term>Biofilms</term><term>Electric Conductivity</term><term>Electrodes</term><term>Electrolysis (instrumentation)</term><term>Hydrogen-Ion Concentration</term><term>Nanotubes, Carbon (chemistry)</term><term>Sulfates (chemistry)</term><term>Sulfates (metabolism)</term><term>Sulfides (chemistry)</term><term>Sulfides (metabolism)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Nanotubes, Carbon</term><term>Sulfates</term><term>Sulfides</term></keywords><keywords scheme="MESH" qualifier="instrumentation" xml:lang="en"><term>Electrolysis</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Bacteria</term><term>Sulfates</term><term>Sulfides</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Biofilms</term><term>Electric Conductivity</term><term>Electrodes</term><term>Hydrogen-Ion Concentration</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Selective microbial retention is of paramount importance for the long-term performance of cathodic sulfate reduction in microbial electrolysis cells (MECs) due to the slow growth rate of autotrophic sulfate-reducing bacteria. In this work, we investigate the biofilm retention and current-to-sulfide conversion efficiency using carbon granules (CG) or multi-wall carbon nanotubes deposited on reticulated vitreous carbon (MWCNT-RVC) as electrode materials. For ~2months, the MECs were operated at sulfate loading rates of 21 to 309gSO4 -S/m(2)/d. Although MWCNT-RVC achieved a current density of 57±11A/m(2), greater than the 32±9A/m(2) observed using CG, both materials exhibited similar sulfate reduction rates (SRR), with MWCNT-RVC reaching 104±16gSO4 -S/m(2)/d while 110±13gSO4 -S/m(2)/d were achieved with CG. Pyrosequencing analysis of the 16S rRNA at the end of experimentation revealed a core community dominated by Desulfovibrio (28%), Methanobacterium (19%) and Desulfomicrobium (14%), on the MWCNT-RVC electrodes. While a similar Desulfovibrio relative abundance of 29% was found in CG-biofilms, Desulfomicrobium was found to be significantly less abundant (4%) and Methanobacterium practically absent (0.2%) on CG electrodes. Surprisingly, our results show that CG can achieve higher current-to-sulfide efficiencies at lower power consumption than the nano-modified three-dimensional MWCNT-RVC.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">28719849</PMID><DateCreated><Year>2017</Year><Month>07</Month><Day>18</Day></DateCreated><DateCompleted><Year>2017</Year><Month>09</Month><Day>27</Day></DateCompleted><DateRevised><Year>2017</Year><Month>09</Month><Day>27</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1878-562X</ISSN><JournalIssue CitedMedium="Internet"><Volume>118</Volume><PubDate><Year>2017</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Bioelectrochemistry (Amsterdam, Netherlands)</Title><ISOAbbreviation>Bioelectrochemistry</ISOAbbreviation></Journal><ArticleTitle>Selective cathodic microbial biofilm retention allows a high current-to-sulfide efficiency in sulfate-reducing microbial electrolysis cells.</ArticleTitle><Pagination><MedlinePgn>62-69</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S1567-5394(17)30259-1</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.bioelechem.2017.07.001</ELocationID><Abstract><AbstractText>Selective microbial retention is of paramount importance for the long-term performance of cathodic sulfate reduction in microbial electrolysis cells (MECs) due to the slow growth rate of autotrophic sulfate-reducing bacteria. In this work, we investigate the biofilm retention and current-to-sulfide conversion efficiency using carbon granules (CG) or multi-wall carbon nanotubes deposited on reticulated vitreous carbon (MWCNT-RVC) as electrode materials. For ~2months, the MECs were operated at sulfate loading rates of 21 to 309gSO4 -S/m(2)/d. Although MWCNT-RVC achieved a current density of 57±11A/m(2), greater than the 32±9A/m(2) observed using CG, both materials exhibited similar sulfate reduction rates (SRR), with MWCNT-RVC reaching 104±16gSO4 -S/m(2)/d while 110±13gSO4 -S/m(2)/d were achieved with CG. Pyrosequencing analysis of the 16S rRNA at the end of experimentation revealed a core community dominated by Desulfovibrio (28%), Methanobacterium (19%) and Desulfomicrobium (14%), on the MWCNT-RVC electrodes. While a similar Desulfovibrio relative abundance of 29% was found in CG-biofilms, Desulfomicrobium was found to be significantly less abundant (4%) and Methanobacterium practically absent (0.2%) on CG electrodes. Surprisingly, our results show that CG can achieve higher current-to-sulfide efficiencies at lower power consumption than the nano-modified three-dimensional MWCNT-RVC.</AbstractText><CopyrightInformation>Copyright © 2017 Elsevier B.V. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Pozo</LastName><ForeName>Guillermo</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia. Electronic address: g.pozozamora@awmc.uq.edu.au.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lu</LastName><ForeName>Yang</ForeName><Initials>Y</Initials><AffiliationInfo><Affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pongy</LastName><ForeName>Sebastien</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia; Département Génie Energétique et Environnement, INSA Lyon, 69621 Villeurbanne Cedex, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Keller</LastName><ForeName>Jürg</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ledezma</LastName><ForeName>Pablo</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Freguia</LastName><ForeName>Stefano</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Advanced Water Management Centre, the University of Queensland, St Lucia, QLD 4072, Australia.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2017</Year><Month>07</Month><Day>12</Day></ArticleDate></Article><MedlineJournalInfo><Country>Netherlands</Country><MedlineTA>Bioelectrochemistry</MedlineTA><NlmUniqueID>100953583</NlmUniqueID><ISSNLinking>1567-5394</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D037742">Nanotubes, Carbon</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D013431">Sulfates</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D013440">Sulfides</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001419" MajorTopicYN="N">Bacteria</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018441" MajorTopicYN="Y">Biofilms</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004553" MajorTopicYN="Y">Electric Conductivity</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004566" MajorTopicYN="N">Electrodes</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004572" MajorTopicYN="N">Electrolysis</DescriptorName><QualifierName UI="Q000295" MajorTopicYN="Y">instrumentation</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006863" MajorTopicYN="N">Hydrogen-Ion Concentration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D037742" MajorTopicYN="N">Nanotubes, Carbon</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013431" MajorTopicYN="N">Sulfates</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013440" MajorTopicYN="N">Sulfides</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>05</Month><Day>05</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2017</Year><Month>07</Month><Day>03</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2017</Year><Month>07</Month><Day>10</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>7</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2017</Year><Month>9</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>7</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28719849</ArticleId><ArticleId IdType="pii">S1567-5394(17)30259-1</ArticleId><ArticleId IdType="doi">10.1016/j.bioelechem.2017.07.001</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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