51
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Blanchet E, Pécastaings S, Erable B, Roques C, Bergel A. Protons accumulation during anodic phase turned to advantage for oxygen reduction during cathodic phase in reversible bioelectrodes. BIORESOURCE TECHNOLOGY 2014; 173:224-230. [PMID: 25305652 DOI: 10.1016/j.biortech.2014.09.076] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 09/15/2014] [Accepted: 09/16/2014] [Indexed: 06/04/2023]
Abstract
Reversible bioelectrodes were designed by alternating acetate and oxygen supply. It was demonstrated that the protons produced and accumulated inside the biofilm during the anodic phase greatly favored the oxygen reduction reaction when the electrode was switched to become the biocathode. Protons accumulation, which hindered the bioanode operation, thus became an advantage for the biocathode. The bioanodes, formed from garden compost leachate under constant polarization at -0.2 V vs. SCE, were able to support long exposure to forced aeration, with only a slight alteration of their anodic efficiency. They produced a current density of 16±1.7 A/m2 for acetate oxidation and up to -0.4 A/m2 for oxygen reduction. Analysis of the microbial communities by 16S rRNA pyrosequencing revealed strong selection of Chloroflexi (49±1%), which was not observed for conventional bioanodes not exposed to oxygen. Chloroflexi were found as the dominant phylum of electroactive biofilms for the first time.
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Affiliation(s)
- Elise Blanchet
- Laboratoire de Génie Chimique (LGC), CNRS, Université de Toulouse (INPT), 4 allée Emile Monso, BP 84234, 31432 Toulouse, France.
| | - Sophie Pécastaings
- Laboratoire de Génie Chimique, BioSym Department, Université de Toulouse, 35 chemin des Maraîchers, 31062 Toulouse, France
| | - Benjamin Erable
- Laboratoire de Génie Chimique (LGC), CNRS, Université de Toulouse (INPT), 4 allée Emile Monso, BP 84234, 31432 Toulouse, France
| | - Christine Roques
- Laboratoire de Génie Chimique, BioSym Department, Université de Toulouse, 35 chemin des Maraîchers, 31062 Toulouse, France
| | - Alain Bergel
- Laboratoire de Génie Chimique (LGC), CNRS, Université de Toulouse (INPT), 4 allée Emile Monso, BP 84234, 31432 Toulouse, France
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52
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Strycharz-Glaven SM, Roy J, Boyd D, Snider R, Erickson JS, Tender LM. Electron Transport through Early Exponential-Phase Anode-GrownGeobacter sulfurreducensBiofilms. ChemElectroChem 2014. [DOI: 10.1002/celc.201402168] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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53
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Ren L, Zhang X, He W, Logan BE. High current densities enable exoelectrogens to outcompete aerobic heterotrophs for substrate. Biotechnol Bioeng 2014; 111:2163-9. [DOI: 10.1002/bit.25290] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 05/02/2014] [Accepted: 05/07/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Lijiao Ren
- Department of Civil and Environmental Engineering; 212 Sackett Building, The Pennsylvania State University; University Park 16802 Pennsylvania
| | - Xiaoyuan Zhang
- Department of Civil and Environmental Engineering; 212 Sackett Building, The Pennsylvania State University; University Park 16802 Pennsylvania
| | - Weihua He
- State Key Laboratory of Urban Water Resource and Environment; Harbin Institute of Technology; Harbin P.R. China
| | - Bruce E. Logan
- Department of Civil and Environmental Engineering; 212 Sackett Building, The Pennsylvania State University; University Park 16802 Pennsylvania
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54
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Zhan G, Zhang L, Tao Y, Wang Y, Zhu X, Li D. Anodic ammonia oxidation to nitrogen gas catalyzed by mixed biofilms in bioelectrochemical systems. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.05.037] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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55
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Zhu X, Yates MD, Hatzell MC, Ananda Rao H, Saikaly PE, Logan BE. Microbial community composition is unaffected by anode potential. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:1352-1358. [PMID: 24364567 DOI: 10.1021/es404690q] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
There is great controversy on how different set anode potentials affect the performance of a bioelectrochemical system (BES). It is often reported that more positive potentials improve acclimation and performance of exoelectrogenic biofilms, and alter microbial community structure, while in other studies relatively more negative potentials were needed to achieve higher current densities. To address this issue, the biomass, electroactivity, and community structure of anodic biofilms were examined over a wide range of set anode potentials (-0.25, -0.09, 0.21, 0.51, and 0.81 V vs a standard hydrogen electrode, SHE) in single-chamber microbial electrolysis cells. Maximum currents produced using a wastewater inoculum increased with anode potentials in the range of -0.25 to 0.21 V, but decreased at 0.51 and 0.81 V. The maximum currents were positively correlated with increasing biofilm biomass. Pyrosequencing indicated biofilm communities were all similar and dominated by bacteria most similar to Geobacter sulfurreducens. Differences in anode performance with various set potentials suggest that the exoelectrogenic communities self-regulate their exocellular electron transfer pathways to adapt to different anode potentials.
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Affiliation(s)
- Xiuping Zhu
- Department of Civil and Environmental Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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56
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Rimboud M, Pocaznoi D, Erable B, Bergel A. Electroanalysis of microbial anodes for bioelectrochemical systems: basics, progress and perspectives. Phys Chem Chem Phys 2014; 16:16349-66. [DOI: 10.1039/c4cp01698j] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Over about the last ten years, microbial anodes have been the subject of a huge number of fundamental studies dealing with an increasing variety of possible application domains.
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Affiliation(s)
- M. Rimboud
- Laboratoire de Génie Chimique
- CNRS - Université de Toulouse
- 31432 Toulouse, France
| | - D. Pocaznoi
- Laboratoire de Génie Chimique
- CNRS - Université de Toulouse
- 31432 Toulouse, France
| | - B. Erable
- Laboratoire de Génie Chimique
- CNRS - Université de Toulouse
- 31432 Toulouse, France
| | - A. Bergel
- Laboratoire de Génie Chimique
- CNRS - Université de Toulouse
- 31432 Toulouse, France
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57
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Jana PS, Katuri K, Kavanagh P, Kumar A, Leech D. Charge transport in films of Geobacter sulfurreducens on graphite electrodes as a function of film thickness. Phys Chem Chem Phys 2014; 16:9039-46. [DOI: 10.1039/c4cp01023j] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Charge transport throughGeobacter sulfurreducensbiofilms increases with film thickness, as more porous films improves ion transport upon electrolysis.
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Affiliation(s)
- Partha Sarathi Jana
- School of Chemistry & Ryan Institute
- National University of Ireland Galway
- Galway, Ireland
| | - Krishna Katuri
- School of Chemistry & Ryan Institute
- National University of Ireland Galway
- Galway, Ireland
- Water Desalination and Reuse Research Center
- King Abdullah University of Science and Technology
| | - Paul Kavanagh
- School of Chemistry & Ryan Institute
- National University of Ireland Galway
- Galway, Ireland
| | - Amit Kumar
- School of Chemistry & Ryan Institute
- National University of Ireland Galway
- Galway, Ireland
| | - Dónal Leech
- School of Chemistry & Ryan Institute
- National University of Ireland Galway
- Galway, Ireland
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58
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Bioanodes/biocathodes formed at optimal potentials enhance subsequent pentachlorophenol degradation and power generation from microbial fuel cells. Bioelectrochemistry 2013; 94:13-22. [DOI: 10.1016/j.bioelechem.2013.05.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 04/27/2013] [Accepted: 05/10/2013] [Indexed: 11/21/2022]
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59
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The open circuit potential of Geobacter sulfurreducens bioanodes depends on the electrochemical adaptation of the strain. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2013.04.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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60
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Commault AS, Lear G, Packer MA, Weld RJ. Influence of anode potentials on selection of Geobacter strains in microbial electrolysis cells. BIORESOURCE TECHNOLOGY 2013; 139:226-234. [PMID: 23665518 DOI: 10.1016/j.biortech.2013.04.047] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Revised: 04/12/2013] [Accepted: 04/12/2013] [Indexed: 06/02/2023]
Abstract
Through their ability to directly transfer electrons to electrodes, Geobacter sp. are key organisms for microbial fuel cell technology. This study presents a simple method to reproducibly select Geobacter-dominated anode biofilms from a mixed inoculum of bacteria using graphite electrodes initially poised at -0.25, -0.36 and -0.42 V vs. Ag/AgCl. The biofilms all produced maximum power density of approximately 270 m Wm(-2) (projected anode surface area). Analysis of 16S rRNA genes and intergenic spacer (ITS) sequences found that the biofilm communities were all dominated by bacteria closely related to Geobacter psychrophilus. Anodes initially poised at -0.25 V reproducibly selected biofilms that were dominated by a strain of G. psychrophilus that was genetically distinct from the strain that dominated the -0.36 and -0.42 V biofilms. This work demonstrates for the first time that closely related strains of Geobacter can have very different competitive advantages at different anode potentials.
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Affiliation(s)
- Audrey S Commault
- Lincoln Agritech Ltd., Lincoln University, P.O. Box 133, Christchurch 7640, New Zealand.
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61
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Cercado B, Byrne N, Bertrand M, Pocaznoi D, Rimboud M, Achouak W, Bergel A. Garden compost inoculum leads to microbial bioanodes with potential-independent characteristics. BIORESOURCE TECHNOLOGY 2013; 134:276-284. [PMID: 23500585 DOI: 10.1016/j.biortech.2013.01.123] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 01/21/2013] [Accepted: 01/22/2013] [Indexed: 06/01/2023]
Abstract
Garden compost leachate was used to form microbial bioanodes under polarization at -0.4, -0.2 and +0.1 V/SCE. Current densities were 6.3 and 8.9 A m(-2) on average at -0.4 and +0.1 V/SCE respectively, with acetate 10 mM. The catalytic cyclic voltammetry (CV) showed similar electrochemical characteristics for all bioanodes and indicated that the lower currents recorded at -0.4V/SCE were due to the slower interfacial electron transfer rate at this potential, consistently with conventional electrochemical kinetics. RNA- and DNA-based DGGE evidenced that the three dominant bacterial groups Geobacter, Anaerophaga and Pelobacter were identical for all bioanodes and did not depend on the polarization potential. Only non-turnover CVs showed differences in the redox equipment of the biofilms, the highest potential promoting multiple electron transfer pathways. This first description of a potential-independent electroactive microbial community opens up promising prospects for the design of stable bioanodes for microbial fuel cells.
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Affiliation(s)
- Bibiana Cercado
- Laboratoire de Génie Chimique (LGC), CNRS, Université de Toulouse (INPT), 4 allée Emile Monso, BP 84234, 31432 Toulouse, France
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62
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Carmona-Martínez AA, Pierra M, Trably E, Bernet N. High current density via direct electron transfer by the halophilic anode respiring bacterium Geoalkalibacter subterraneus. Phys Chem Chem Phys 2013; 15:19699-707. [DOI: 10.1039/c3cp54045f] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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63
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Patil SA, Hägerhäll C, Gorton L. Electron transfer mechanisms between microorganisms and electrodes in bioelectrochemical systems. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s12566-012-0033-x] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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