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Mendoza-Chávez CE, Mostafazadeh AK, Drogui P, Buelna-Acedo G, Ulloa-Mercado RG, Leyva-Soto LA, Serrano-Palacios D, Rentería-Méxia A, Díaz-Tenorio LM, Gortáres-Moryoqui P. Evaluation of different operational conditions in a microbial electrolysis cell inoculated with a pure culture of Shewanella oneidensis for hydrogen production. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34609-8. [PMID: 39106009 DOI: 10.1007/s11356-024-34609-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 07/31/2024] [Indexed: 08/07/2024]
Abstract
Hydrogen is a promising alternative to meet the world's energy demand in the future because of its energetic characteristics. Microbial electrolysis cell (MEC) produces hydrogen from organic matter using exoelectrogenic bacteria. Shewanella oneidensis stands out for having the capacity to produce hydrogen using different electron transfer mechanisms. The present research aims to evaluate the hydrogen production efficiency in a MEC inoculated with a pure culture of S. oneidensis in different operational conditions. Since the use of a catalyst accounts for most of the MEC cost, no catalyst was used for anode or cathode. Experiments were performed in semi-continuous and batch mode using different electrodes, voltages applied, and medium in aerobic and anaerobic conditions. The highest hydrogen production rate (HPR) was 0.107 m3 of H2/m3day obtained in a semi-continuous experiment using graphite plates and stainless steel electrodes. In batch experiments, a HPR occurred at 0.7 V, with a value of 0.048 m3 of H2/m3day versus 0.037 m3 of H2/m3day with 0.9 V. HPR was higher with carbon felt electrode (0.056 m3 of H2/m3day). However, current density dropped after 38 h, with carbon felt electrodes, and did not recover. Results of the present research showed that the MEC using a pure culture of S. oneidensis can be considered an alternative for hydrogen production without using a catalyst. Also, S. oneidensis produced hydrogen in both anaerobic and aerobic conditions with low methane production. Optimization can be proposed to improve hydrogen production based on the operational conditions tested in these experiments.
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Affiliation(s)
- Claudia Erika Mendoza-Chávez
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (Centro de Investigación E Innovación en Biotecnologíaa, Agropecuaria y Ambiental), 5 de Febrero 818 Sur , C.P 85000, Ciudad Obregón, Sonora, México
| | - Ali Khosravanipour Mostafazadeh
- Centre Eau, Terre Et Environnement (INRS-ETE), Institut National de La Recherche Scientifique, Université du Québec, 490 Rue de La Couronne, Québec, QC, G1K 9A9, Canada
| | - Patrick Drogui
- Centre Eau, Terre Et Environnement (INRS-ETE), Institut National de La Recherche Scientifique, Université du Québec, 490 Rue de La Couronne, Québec, QC, G1K 9A9, Canada
| | - Gerardo Buelna-Acedo
- Centre Eau, Terre Et Environnement (INRS-ETE), Institut National de La Recherche Scientifique, Université du Québec, 490 Rue de La Couronne, Québec, QC, G1K 9A9, Canada
| | - Ruth Gabriela Ulloa-Mercado
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (Centro de Investigación E Innovación en Biotecnologíaa, Agropecuaria y Ambiental), 5 de Febrero 818 Sur , C.P 85000, Ciudad Obregón, Sonora, México
| | - Luis Alonso Leyva-Soto
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (Centro de Investigación E Innovación en Biotecnologíaa, Agropecuaria y Ambiental), 5 de Febrero 818 Sur , C.P 85000, Ciudad Obregón, Sonora, México
- Programa Investigadoras e Investigadores por México, CONAHCYT, Av. Insurgentes Sur 1582, 03940, Ciudad de México, México
| | - Denisse Serrano-Palacios
- Departamento de Ciencias del Agua y Medio Ambiente, Instituto Tecnológico de Sonora (Laboratorio de Investigación en Ingeniería Química y Alimentos. Antonio Caso S/N y E. Kino, Colonia Villa ITSON, C.P. 85130, Ciudad Obregón, Sonora, México
| | - Ana Rentería-Méxia
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (Centro de Investigación E Innovación en Biotecnologíaa, Agropecuaria y Ambiental), 5 de Febrero 818 Sur , C.P 85000, Ciudad Obregón, Sonora, México
| | - Lourdes Mariana Díaz-Tenorio
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (Centro de Investigación E Innovación en Biotecnologíaa, Agropecuaria y Ambiental), 5 de Febrero 818 Sur , C.P 85000, Ciudad Obregón, Sonora, México
| | - Pablo Gortáres-Moryoqui
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora (Centro de Investigación E Innovación en Biotecnologíaa, Agropecuaria y Ambiental), 5 de Febrero 818 Sur , C.P 85000, Ciudad Obregón, Sonora, México.
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Jalili P, Ala A, Nazari P, Jalili B, Ganji DD. A comprehensive review of microbial fuel cells considering materials, methods, structures, and microorganisms. Heliyon 2024; 10:e25439. [PMID: 38371992 PMCID: PMC10873675 DOI: 10.1016/j.heliyon.2024.e25439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 01/02/2024] [Accepted: 01/26/2024] [Indexed: 02/20/2024] Open
Abstract
Microbial fuel cells (MFCs) are promising for generating renewable energy from organic matter and efficient wastewater treatment. Ensuring their practical viability requires meticulous optimization and precise design. Among the critical components of MFCs, the membrane separator plays a pivotal role in segregating the anode and cathode chambers. Recent investigations have shed light on the potential benefits of membrane-less MFCs in enhancing power generation. However, it is crucial to recognize that such configurations can adversely impact the electrocatalytic activity of anode microorganisms due to increased substrate and oxygen penetration, leading to decreased coulombic efficiency. Therefore, when selecting a membrane for MFCs, it is essential to consider key factors such as internal resistance, substrate loss, biofouling, and oxygen diffusion. Addressing these considerations carefully allows researchers to advance the performance and efficiency of MFCs, facilitating their practical application in sustainable energy production and wastewater treatment. Accelerated substrate penetration could also lead to cathode clogging and bacterial inactivation, reducing the MFC's efficiency. Overall, the design and optimization of MFCs, including the selection and use of membranes, are vital for their practical application in renewable energy generation and wastewater treatment. Further research is necessary to overcome the challenges of MFCs without a membrane and to develop improved membrane materials for MFCs. This review article aims to compile comprehensive information about all constituents of the microbial fuel cell, providing practical insights for researchers examining various variables in microbial fuel cell research.
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Affiliation(s)
- Payam Jalili
- Department of Mechanical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Amirhosein Ala
- Department of Mechanical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Parham Nazari
- Department of Mechanical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Bahram Jalili
- Department of Mechanical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Davood Domiri Ganji
- Department of Mechanical Engineering, Babol Noshirvani University of Technology, P.O. Box 484, Babol, Iran
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Dong F, Simoska O, Gaffney E, Minteer SD. Applying synthetic biology strategies to bioelectrochemical systems. ELECTROCHEMICAL SCIENCE ADVANCES 2021. [DOI: 10.1002/elsa.202100197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Fangyuan Dong
- Department of Chemistry University of Utah Salt Lake City Utah USA
| | - Olja Simoska
- Department of Chemistry University of Utah Salt Lake City Utah USA
| | - Erin Gaffney
- Department of Chemistry University of Utah Salt Lake City Utah USA
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Abstract
Aizome (Japanese indigo dyeing) is a unique dyeing method using microbial activity under anaerobic alkaline conditions. In indigo-dye fermenting suspensions; microorganisms reduce indigo into leuco-indigo with acetaldehyde as a reductant. In this study; we constructed a semi-microbial biofuel cell using an indigo-dye fermenting suspension. Carbon fiber and Pt mesh were used as the anode and cathode materials, respectively. The open-circuit voltage (OCV) was 0.6 V, and the maximum output power was 32 µW cm−2 (320 mW m−2). In addition, the continuous stability was evaluated under given conditions starting with the highest power density; the power density rapidly decreased in 0.5 h due to the degradation of the anode. Conversely, at the OCV, the anode potential exhibited high stability for two days. However, the OCV decreased by approximately 80 mV after 2 d compared with the initial value, which was attributed to the performance degradation of the gas-diffusion-cathode system caused by the evaporation of the dispersion solution. This is the first study to construct a semi-microbial biofuel cell using an indigo-dye fermenting suspension.
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Zhang S, Wang L, Wu L, Li Z, Yang B, Hou Y, Lei L, Cheng S, He Q. Deciphering Single-Bacterium Adhesion Behavior Modulated by Extracellular Electron Transfer. NANO LETTERS 2021; 21:5105-5115. [PMID: 34086465 DOI: 10.1021/acs.nanolett.1c01062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
For bacterial adhesion and biofilm formation, a thorough understanding of the mechanism and effective modulating is lacking due to the complex extracellular electron transfer (EET) at bacteria-surface interfaces. Here, we explore the adhesion behavior of a model electroactive bacteria under various metabolic conditions by an integrated electrochemical single-cell force microscopy system. A nonlinear model between bacterial adhesion force and electric field intensity is established, which provides a theoretical foundation for precise tuning of bacterial adhesion strength by the surface potential and the direction and flux of electron flow. In particular, based on quantitative analyses with equivalent charge distribution modeling and wormlike chain numerical simulations, it is demonstrated that the chain conformation and unfolding events of outer membrane appendages are dominantly impacted by the dynamic bacterial EET processes. This reveals how the anisotropy of bacterial conductive structure can translate into the desired adhesion behavior in different scenarios.
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Affiliation(s)
- Shuomeng Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Lei Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Liang Wu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China
| | - Zhongjian Li
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Institute of Zhejiang University, Quzhou, Quzhou 32400, China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China
| | - Bin Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Institute of Zhejiang University, Quzhou, Quzhou 32400, China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China
| | - Yang Hou
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Institute of Zhejiang University, Quzhou, Quzhou 32400, China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Institute of Zhejiang University, Quzhou, Quzhou 32400, China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China
| | - Shaoan Cheng
- College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Qinggang He
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Ningbo Research Institute, Zhejiang University, Ningbo, Zhejiang 315100, China
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Engineering S. oneidensis for Performance Improvement of Microbial Fuel Cell-a Mini Review. Appl Biochem Biotechnol 2020; 193:1170-1186. [PMID: 33200267 DOI: 10.1007/s12010-020-03469-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 11/09/2020] [Indexed: 02/02/2023]
Abstract
Microbial fuel cell (MFC) is a promising technology that utilizes exoelectrogens cultivated in the form of biofilm to generate power from various types of sources supplied. A metal-reducing pathway is utilized by these organisms to transfer electrons obtained from the metabolism of substrate from anaerobic respiration extracellularly. A widely established model organism that is capable of extracellular electron transfer (EET) is Shewanella oneidensis. This review highlights the strategies used in the transformation of S. oneidensis and the recent development of MFC in terms of intervention through genetic modifications. S. oneidensis was genetically engineered for several aims including the study on the underlying mechanisms of EET, and the enhancement of power generation and wastewater treating potential when used in an MFC. Through engineering S. oneidensis, genes responsible for EET are identified and strategies on enhancing the EET efficiency are studied. Overexpressing genes related to EET to enhance biofilm formation, mediator biosynthesis, and respiration appears as one of the common approaches.
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Exploration of Electrochemcially Active Bacterial Strains for Microbial Fuel Cells: An Innovation in Bioelectricity Generation. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.1.12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Dykstra CM, Pavlostathis SG. Evaluation of gas and carbon transport in a methanogenic bioelectrochemical system (BES). Biotechnol Bioeng 2016; 114:961-969. [PMID: 27922181 DOI: 10.1002/bit.26230] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 11/22/2016] [Accepted: 11/27/2016] [Indexed: 02/04/2023]
Abstract
Bioelectrochemical systems (BESs) may be used to upgrade anaerobic digester biogas by directly converting CO2 to CH4 . The objective of this study was to evaluate gas (N2 , CO2 , CH4 , and H2 ) and carbon transport within a methanogenic BES. Four BES configurations were evaluated: abiotic anode with abiotic cathode (AAn-ACa), bioanode with abiotic cathode (BAn-ACa), abiotic anode with biocathode (AAn-BCa), and bioanode with biocathode (BAn-BCa). Transport of N2 , a gas commonly used for flushing anoxic systems, out of the anode headspace ranged from 3.7 to 6.2 L/d-atm-m2 , normalized to the proton exchange membrane (PEM) surface area and net driving pressure (NDP). CO2 was transported from the cathode to the anode headspace at rates from 3.7 to 5.4 L/d-atm-m2 . The flux of H2 from cathode to anode headspace was 48% greater when the system had a biocathode (AAn-BCa) than when H2 was produced at an abiotic cathode (BAn-ACa), even though the abiotic cathode headspace had 75% more H2 than the AAn-BCa biocathode at the end of 1 day. A 7-day carbon balance of a batch-fed BAn-BCa BES showed transient microbial carbon storage and a net transport of carbon from anode to cathode. After a 7-day batch incubation, the CH4 production in the biocathode was 27% greater on a molar basis than the initial CO2 supplied to the biocathode headspace, indicating conversion of CO2 produced in the anode. This research expands the current understanding of methanogenic BES operation, which may be used in improving the assessment of BES performance and/or in the development of alternative BES designs and mathematical models. Biotechnol. Bioeng. 2017;114: 961-969. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Christy M Dykstra
- School of Civil and Environmental Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia, 30332-0512
| | - Spyros G Pavlostathis
- School of Civil and Environmental Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia, 30332-0512
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Vilajeliu-Pons A, Bañeras L, Puig S, Molognoni D, Vilà-Rovira A, Hernández-del Amo E, Balaguer MD, Colprim J. External Resistances Applied to MFC Affect Core Microbiome and Swine Manure Treatment Efficiencies. PLoS One 2016; 11:e0164044. [PMID: 27701451 PMCID: PMC5049776 DOI: 10.1371/journal.pone.0164044] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 09/19/2016] [Indexed: 11/19/2022] Open
Abstract
Microbial fuel cells (MFCs) can be designed to combine water treatment with concomitant electricity production. Animal manure treatment has been poorly explored using MFCs, and its implementation at full-scale primarily relies on the bacterial distribution and activity within the treatment cell. This study reports the bacterial community changes at four positions within the anode of two almost identically operated MFCs fed swine manure. Changes in the microbiome structure are described according to the MFC fluid dynamics and the application of a maximum power point tracking system (MPPT) compared to a fixed resistance system (Ref-MFC). Both external resistance and cell hydrodynamics are thought to heavily influence MFC performance. The microbiome was characterised both quantitatively (qPCR) and qualitatively (454-pyrosequencing) by targeting bacterial 16S rRNA genes. The diversity of the microbial community in the MFC biofilm was reduced and differed from the influent swine manure. The adopted electric condition (MPPT vs fixed resistance) was more relevant than the fluid dynamics in shaping the MFC microbiome. MPPT control positively affected bacterial abundance and promoted the selection of putatively exoelectrogenic bacteria in the MFC core microbiome (Sedimentibacter sp. and gammaproteobacteria). These differences in the microbiome may be responsible for the two-fold increase in power production achieved by the MPPT-MFC compared to the Ref-MFC.
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Affiliation(s)
| | - Lluis Bañeras
- Molecular Microbial Ecology Group, Institute of Aquatic Ecology, University of Girona, Girona, Spain
- * E-mail:
| | - Sebastià Puig
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
| | - Daniele Molognoni
- Department of Civil Engineering and Architecture (D.I.C.Ar.), University of Pavia, Pavia, Italy
| | - Albert Vilà-Rovira
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
| | - Elena Hernández-del Amo
- Molecular Microbial Ecology Group, Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Maria D. Balaguer
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
| | - Jesús Colprim
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
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Kim BJ, Chu I, Jusuf S, Kuo T, TerAvest MA, Angenent LT, Wu M. Oxygen Tension and Riboflavin Gradients Cooperatively Regulate the Migration of Shewanella oneidensis MR-1 Revealed by a Hydrogel-Based Microfluidic Device. Front Microbiol 2016; 7:1438. [PMID: 27703448 PMCID: PMC5028412 DOI: 10.3389/fmicb.2016.01438] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 08/30/2016] [Indexed: 11/13/2022] Open
Abstract
Shewanella oneidensis is a model bacterial strain for studies of bioelectrochemical systems (BESs). It has two extracellular electron transfer pathways: (1) shuttling electrons via an excreted mediator riboflavin; and (2) direct contact between the c-type cytochromes at the cell membrane and the electrode. Despite the extensive use of S. oneidensis in BESs such as microbial fuel cells and biosensors, many basic microbiology questions about S. oneidensis in the context of BES remain unanswered. Here, we present studies of motility and chemotaxis of S. oneidensis under well controlled concentration gradients of two electron acceptors, oxygen and oxidized form of riboflavin (flavin+), using a newly developed microfluidic platform. Experimental results demonstrate that either oxygen or flavin+ is a chemoattractant to S. oneidensis. The chemotactic tendency of S. oneidensis in a flavin+ concentration gradient is significantly enhanced in an anaerobic in contrast to an aerobic condition. Furthermore, either a low oxygen tension or a high flavin+ concentration considerably enhances the speed of S. oneidensis. This work presents a robust microfluidic platform for generating oxygen and/or flavin+ gradients in an aqueous environment, and demonstrates that two important electron acceptors, oxygen and oxidized riboflavin, cooperatively regulate S. oneidensis migration patterns. The microfluidic tools presented as well as the knowledge gained in this work can be used to guide the future design of BESs for efficient electron production.
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Affiliation(s)
- Beum Jun Kim
- Department of Biological and Environmental Engineering, Cornell University Ithaca, NY, USA
| | - Injun Chu
- School of Chemical and Biomolecular Engineering, Cornell University Ithaca, NY, USA
| | - Sebastian Jusuf
- Department of Biological and Environmental Engineering, Cornell University Ithaca, NY, USA
| | - Tiffany Kuo
- Department of Biological and Environmental Engineering, Cornell University Ithaca, NY, USA
| | - Michaela A TerAvest
- Department of Biological and Environmental Engineering, Cornell University Ithaca, NY, USA
| | - Largus T Angenent
- Department of Biological and Environmental Engineering, Cornell UniversityIthaca, NY, USA; Atkinson Center for a Sustainable Future, Cornell UniversityIthaca, NY, USA
| | - Mingming Wu
- Department of Biological and Environmental Engineering, Cornell UniversityIthaca, NY, USA; Atkinson Center for a Sustainable Future, Cornell UniversityIthaca, NY, USA
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11
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Rosa LFM, Hunger S, Gimkiewicz C, Zehnsdorf A, Harnisch F. Paving the way for bioelectrotechnology: Integrating electrochemistry into bioreactors. Eng Life Sci 2016; 17:77-85. [PMID: 32624731 DOI: 10.1002/elsc.201600105] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 05/17/2016] [Accepted: 06/14/2016] [Indexed: 11/05/2022] Open
Abstract
The reactor systems used for microbial electrosynthesis, i.e. bioelectrochemical systems for achieving bioproduction so far reported in literature are relatively small in scale and highly diverse in their architecture and modes of operation. The often diverging requirements of the electrochemical and the biological processes and the interdisciplinarity of the field make the engineering of these systems a special challenge. This has led to multiple, differently optimized approaches of reactor vessels, designs and operating conditions making standardization and normalization or even a systematic engineering almost impossible. Overcoming this lack of standardization, scalability and knowledge-driven engineering is the driving force for this work introducing an upgrade kit for bioreactors transforming these reversibly to bioelectroreactors. The prototypes of the bioreactor upgrade kit were integrated with commercial bioreactor (fermentor) systems and performances compared to a classic, small-scale bioelectrochemical glass cell system. The use of the upgrade kit allowed interfacing with the existing infrastructure of the conventional bioreactors for growing electroactive microorganisms in pure culture conditions, with the added electrochemical control and further process monitoring. The results of growing Shewanella oneidensis MR-1 clearly show that these systems can be used to control, monitor, and scale microbial bioelectrochemical processes, providing better resolution of the data for the tested experimental conditions.
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Affiliation(s)
- Luis F M Rosa
- Department of Environmental Microbiology Helmholtz-Centre for Environmental Research Leipzig Germany
| | - Steffi Hunger
- Centre for Environmental Biotechnology Helmholtz-Centre for Environmental Research Leipzig Germany
| | - Carla Gimkiewicz
- Department of Environmental Microbiology Helmholtz-Centre for Environmental Research Leipzig Germany
| | - Andreas Zehnsdorf
- Centre for Environmental Biotechnology Helmholtz-Centre for Environmental Research Leipzig Germany
| | - Falk Harnisch
- Department of Environmental Microbiology Helmholtz-Centre for Environmental Research Leipzig Germany
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12
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Lu M, Chan S, Babanova S, Bretschger O. Effect of oxygen on the per-cell extracellular electron transfer rate of Shewanella oneidensis MR-1 explored in bioelectrochemical systems. Biotechnol Bioeng 2016; 114:96-105. [PMID: 27399911 PMCID: PMC5132103 DOI: 10.1002/bit.26046] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/06/2016] [Indexed: 02/03/2023]
Abstract
Extracellular electron transfer (EET) is a mechanism that enables microbes to respire solid‐phase electron acceptors. These EET reactions most often occur in the absence of oxygen, since oxygen can act as a competitive electron acceptor for many facultative microbes. However, for Shewanella oneidensis MR‐1, oxygen may increase biomass development, which could result in an overall increase in EET activity. Here, we studied the effect of oxygen on S. oneidensis MR‐1 EET rates using bioelectrochemical systems (BESs). We utilized optically accessible BESs to monitor real‐time biomass growth, and studied the per‐cell EET rate as a function of oxygen and riboflavin concentrations in BESs of different design and operational conditions. Our results show that oxygen exposure promotes biomass development on the electrode, but significantly impairs per‐cell EET rates even though current production does not always decrease with oxygen exposure. Additionally, our results indicated that oxygen can affect the role of riboflavin in EET. Under anaerobic conditions, both current density and per‐cell EET rate increase with the riboflavin concentration. However, as the dissolved oxygen (DO) value increased to 0.42 mg/L, riboflavin showed very limited enhancement on per‐cell EET rate and current generation. Since it is known that oxygen can promote flavins secretion in S. oneidensis, the role of riboflavin may change under anaerobic and aerobic conditions. Biotechnol. Bioeng. 2017;114: 96–105. © 2016 The Authors. Biotechnology and Bioengineering Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Mengqian Lu
- Department of Microbial and Environmental Genomics, J. Craig Venter Institute, 4120 Capricorn Lane, La Jolla, California 92037
| | - Shirley Chan
- Department of Microbial and Environmental Genomics, J. Craig Venter Institute, 4120 Capricorn Lane, La Jolla, California 92037
| | - Sofia Babanova
- Department of Microbial and Environmental Genomics, J. Craig Venter Institute, 4120 Capricorn Lane, La Jolla, California 92037.,Chemical and Biological Engineering, University of New Mexico, Albuquerque, New Mexico
| | - Orianna Bretschger
- Department of Microbial and Environmental Genomics, J. Craig Venter Institute, 4120 Capricorn Lane, La Jolla, California 92037
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Renslow R, Babauta J, Kuprat A, Schenk J, Ivory C, Fredrickson J, Beyenal H. Modeling biofilms with dual extracellular electron transfer mechanisms. Phys Chem Chem Phys 2013; 15:19262-83. [PMID: 24113651 PMCID: PMC3868370 DOI: 10.1039/c3cp53759e] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrochemically active biofilms have a unique form of respiration in which they utilize solid external materials as terminal electron acceptors for their metabolism. Currently, two primary mechanisms have been identified for long-range extracellular electron transfer (EET): a diffusion- and a conduction-based mechanism. Evidence in the literature suggests that some biofilms, particularly Shewanella oneidensis, produce the requisite components for both mechanisms. In this study, a generic model is presented that incorporates the diffusion- and the conduction-based mechanisms and allows electrochemically active biofilms to utilize both simultaneously. The model was applied to S. oneidensis and Geobacter sulfurreducens biofilms using experimentally generated data found in the literature. Our simulation results show that (1) biofilms having both mechanisms available, especially if they can interact, may have a metabolic advantage over biofilms that can use only a single mechanism; (2) the thickness of G. sulfurreducens biofilms is likely not limited by conductivity; (3) accurate intrabiofilm diffusion coefficient values are critical for current generation predictions; and (4) the local biofilm potential and redox potential are two distinct parameters and cannot be assumed to have identical values. Finally, we determined that simulated cyclic and squarewave voltammetry based on our model are currently not capable of determining the specific percentages of extracellular electron transfer mechanisms in a biofilm. The developed model will be a critical tool for designing experiments to explain EET mechanisms.
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Affiliation(s)
- Ryan Renslow
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, 118 Dana Hall Spokane St., P.O. Box 642710, Pullman, WA 99164-2710, USA.
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Beg QK, Zampieri M, Klitgord N, Collins SB, Altafini C, Serres MH, Segrè D. Detection of transcriptional triggers in the dynamics of microbial growth: application to the respiratorily versatile bacterium Shewanella oneidensis. Nucleic Acids Res 2012; 40:7132-49. [PMID: 22638572 PMCID: PMC3424579 DOI: 10.1093/nar/gks467] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The capacity of microorganisms to respond to variable external conditions requires a coordination of environment-sensing mechanisms and decision-making regulatory circuits. Here, we seek to understand the interplay between these two processes by combining high-throughput measurement of time-dependent mRNA profiles with a novel computational approach that searches for key genetic triggers of transcriptional changes. Our approach helped us understand the regulatory strategies of a respiratorily versatile bacterium with promising bioenergy and bioremediation applications, Shewanella oneidensis, in minimal and rich media. By comparing expression profiles across these two conditions, we unveiled components of the transcriptional program that depend mainly on the growth phase. Conversely, by integrating our time-dependent data with a previously available large compendium of static perturbation responses, we identified transcriptional changes that cannot be explained solely by internal network dynamics, but are rather triggered by specific genes acting as key mediators of an environment-dependent response. These transcriptional triggers include known and novel regulators that respond to carbon, nitrogen and oxygen limitation. Our analysis suggests a sequence of physiological responses, including a coupling between nitrogen depletion and glycogen storage, partially recapitulated through dynamic flux balance analysis, and experimentally confirmed by metabolite measurements. Our approach is broadly applicable to other systems.
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Affiliation(s)
- Qasim K Beg
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
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15
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Rosenbaum MA, Bar HY, Beg QK, Segrè D, Booth J, Cotta MA, Angenent LT. Transcriptional analysis of Shewanella oneidensis MR-1 with an electrode compared to Fe(III)citrate or oxygen as terminal electron acceptor. PLoS One 2012; 7:e30827. [PMID: 22319591 PMCID: PMC3271074 DOI: 10.1371/journal.pone.0030827] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 12/29/2011] [Indexed: 11/19/2022] Open
Abstract
Shewanella oneidensis is a target of extensive research in the fields of bioelectrochemical systems and bioremediation because of its versatile metabolic capabilities, especially with regard to respiration with extracellular electron acceptors. The physiological activity of S. oneidensis to respire at electrodes is of great interest, but the growth conditions in thin-layer biofilms make physiological analyses experimentally challenging. Here, we took a global approach to evaluate physiological activity with an electrode as terminal electron acceptor for the generation of electric current. We performed expression analysis with DNA microarrays to compare the overall gene expression with an electrode to that with soluble iron(III) or oxygen as the electron acceptor and applied new hierarchical model-based statistics for the differential expression analysis. We confirmed the differential expression of many genes that have previously been reported to be involved in electrode respiration, such as the entire mtr operon. We also formulate hypotheses on other possible gene involvements in electrode respiration, for example, a role of ScyA in inter-protein electron transfer and a regulatory role of the cbb3-type cytochrome c oxidase under anaerobic conditions. Further, we hypothesize that electrode respiration imposes a significant stress on S. oneidensis, resulting in higher energetic costs for electrode respiration than for soluble iron(III) respiration, which fosters a higher metabolic turnover to cover energy needs. Our hypotheses now require experimental verification, but this expression analysis provides a fundamental platform for further studies into the molecular mechanisms of S. oneidensis electron transfer and the physiologically special situation of growth on a poised-potential surface.
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Affiliation(s)
- Miriam A. Rosenbaum
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York, United States of America
| | - Haim Y. Bar
- Department of Biological Statistics and Computational Biology, Cornell University, Ithaca, New York, United States of America
| | - Qasim K. Beg
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America
| | - Daniel Segrè
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
- Bioinformatics Program, Boston University, Boston, Massachusetts, United States of America
| | - James Booth
- Department of Biological Statistics and Computational Biology, Cornell University, Ithaca, New York, United States of America
| | - Michael A. Cotta
- Bioenergy Research Unit, United States Department of Agriculture, Agricultural Research Service (ARS), National Center for Agricultural Utilization Research (NCAUR), Peoria, Illinois, United States of America
| | - Largus T. Angenent
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York, United States of America
- * E-mail:
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