Journal ArticleDOI
Electroactive bacteria—molecular mechanisms and genetic tools
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TLDR
This review describes and compares key microbiological features of different EAB and focuses on achievements and future prospects of genetic manipulation for efficient strain development.Abstract:
In nature, different bacteria have evolved strategies to transfer electrons far beyond the cell surface. This electron transfer enables the use of these bacteria in bioelectrochemical systems (BES), such as microbial fuel cells (MFCs) and microbial electrosynthesis (MES). The main feature of electroactive bacteria (EAB) in these applications is the ability to transfer electrons from the microbial cell to an electrode or vice versa instead of the natural redox partner. In general, the application of electroactive organisms in BES offers the opportunity to develop efficient and sustainable processes for the production of energy as well as bulk and fine chemicals, respectively. This review describes and compares key microbiological features of different EAB. Furthermore, it focuses on achievements and future prospects of genetic manipulation for efficient strain development.read more
Citations
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Journal ArticleDOI
Microbial electron transport and energy conservation - the foundation for optimizing bioelectrochemical systems.
TL;DR: This work summarizes the current knowledge on electron transport processes and uses a theoretical approach to predict the impact of different modes of transfer on the energy metabolism, which will help to optimize and advance bioelectrochemical techniques.
sulfurreducens on fuel cell anodes indicates possible roles of OmcB, OmcZ, type IV pili, and protons in extracellular electron transfer†
TL;DR: In this paper, cyclic voltammetry (CV) of wild type (WT) and mutant G. sulfurreducens strains was used to demonstrate the use of bound extracellular electron transfer mediators by Geobacter biofilms and the distinct roles of OmcB and OmcZ.
Journal ArticleDOI
Extracellular Enzymes Facilitate Electron Uptake in Biocorrosion and Bioelectrosynthesis
TL;DR: Investigation of the electron uptake characteristics of the Fe(0)-corroding and electromethanogenic archaeon Methanococcus maripaludis discovered that free, surface-associated redox enzymes, such as hydrogenases and presumably formate dehydrogenases, are sufficient to mediate an apparent direct electron uptake.
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Methanogens: biochemical background and biotechnological applications.
TL;DR: This review summarizes the biochemical and metabolic background of methanogenesis as well as the latest technical applications of meethanogens to give a sufficient overview over the topic to both, biologists and engineers handling biological or bioelectrochemical meethanogenesis.
Journal ArticleDOI
Transforming the carbon economy: challenges and opportunities in the convergence of low-cost electricity and reductive CO2 utilization
TL;DR: In this paper, the authors assess and characterize the top technical barriers for utilizing renewable electricity for CO2 reduction across five different conversion approaches (direct electrochemical, direct bioelectrochemical, indirect non-thermal plasma, indirect bioelectron, and indirect thermochemical) under state-of-technology conditions, outline the R&D needs to overcome each barrier, and identify the most promising C1-C3 hydrocarbons and oxygenates based on their relative ease of formation, economic viability, CO2 utilization potential, and energy storage capacity.
References
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Journal ArticleDOI
Extracellular electron transfer via microbial nanowires.
Gemma Reguera,Kevin D. McCarthy,Teena Mehta,Julie S. Nicoll,Mark T. Tuominen,Derek R. Lovley +5 more
TL;DR: Results indicate that the pili of G. sulfurreducens might serve as biological nanowires, transferring electrons from the cell surface to the surface of Fe(iii) oxides, indicating possibilities for other unique cell-surface and cell–cell interactions, and for bioengineering of novel conductive materials.
Journal ArticleDOI
Electricity production by geobacter sulfurreducens attached to electrodes
Daniel R. Bond,Derek R. Lovley +1 more
TL;DR: The results suggest that the effectiveness of microbial fuel cells can be increased with organisms such as G. sulfurreducens that can attach to electrodes and remain viable for long periods of time while completely oxidizing organic substrates with quantitative transfer of electrons to an electrode.
Journal ArticleDOI
Exoelectrogenic bacteria that power microbial fuel cells
TL;DR: This Progress article explores the underlying reasons for exocellular electron transfer, including cellular respiration and possible cell–cell communication, to understand bacterial versatility in mechanisms used for current generation.
Journal ArticleDOI
Electrically conductive bacterial nanowires produced by Shewanella oneidensis strain MR-1 and other microorganisms
Yuri A. Gorby,Svetlana Yanina,Jeffrey S. McLean,Kevin M. Rosso,Dianne M. Moyles,Alice Dohnalkova,Terry J. Beveridge,In Seop Chang,Byung Hong Kim,Kyung Shik Kim,David E. Culley,Samantha B. Reed,Margaret F. Romine,Daad A. Saffarini,Eric A. Hill,Liang Shi,Dwayne A. Elias,Dwayne A. Elias,David W. Kennedy,Grigoriy E. Pinchuk,Kazuya Watanabe,Shun'ichi Ishii,Bruce E. Logan,Kenneth H. Nealson,James K. Fredrickson +24 more
TL;DR: Nanowires produced by the oxygenic phototrophic cyanobacterium Synechocystis PCC6803 and the thermophilic, fermentative bacterium Pelotomaculum thermopropionicum reveal that electrically conductive appendages are not exclusive to dissimilatory metal-reducing bacteria and may, in fact, represent a common bacterial strategy for efficient electron transfer and energy distribution.
Journal ArticleDOI
Humic substances as electron acceptors for microbial respiration
Derek R. Lovley,John D. Coates,Elizabeth L. Blunt-Harris,Elizabeth J. P. Phillips,Joan C. Woodward,Joan C. Woodward +5 more
TL;DR: In this article, it was shown that some microorganisms found in soils and sediments are able to use humic substances as an electron acceptor for the anaerobic oxidation of organic compounds and hydrogen.
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