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Amanze C, Zheng X, Anaman R, Wu X, Fosua BA, Xiao S, Xia M, Ai C, Yu R, Wu X, Shen L, Liu Y, Li J, Dolgor E, Zeng W. Effect of nickel (II) on the performance of anodic electroactive biofilms in bioelectrochemical systems. WATER RESEARCH 2022; 222:118889. [PMID: 35907303 DOI: 10.1016/j.watres.2022.118889] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/19/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
The impact of nickel (Ni2+) on the performance of anodic electroactive biofilms (EABs) in the bioelectrochemical system (BES) was investigated in this study. Although it has been reported that Ni2+ influences microorganisms in a number of ways, it is unknown how its presence in the anode of a BES affects extracellular electron transfer (EET) of EABs, microbial viability, and the bacterial community. Results revealed that the addition of Ni2+ decreased power output from 673.24 ± 12.40 mW/m2 at 0 mg/L to 179.26 ± 9.05 mW/m2 at 80 mg/L. The metal and chemical oxygen demand removal efficiencies of the microbial fuel cells (MFCs) declined as Ni2+ concentration increased, which could be attributed to decreased microbial viability as revealed by SEM and CLSM. FTIR analysis revealed the involvement of various microbial biofilm functional groups, including hydroxyl, amides, methyl, amine, and carboxyl, in the uptake of Ni2+. The presence of Ni2+ on the anodic biofilms was confirmed by SEM-EDS and XPS analyses. CV demonstrated that the electron transfer performance of the anodic biofilms was negatively correlated with the various Ni2+ concentrations. EIS showed that the internal resistance of the MFCs increased with increasing Ni2+ concentration, resulting in a decrease in power output. High-throughput sequencing results revealed a decrease in Geobacter and an increase in Desulfovibrio in response to Ni2+ concentrations of 10, 20, 40, and 80 mg/L. Furthermore, the various Ni2+ concentrations decreased the expression of EET-related genes. The Ni2+-fed MFCs had a higher abundance of the nikR gene than the control group, which was important for Ni2+ resistance. This work advances our understanding of Ni2+ inhibition on EABs, as well as the concurrent removal of organic matter and Ni2+ from wastewater.
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Affiliation(s)
- Charles Amanze
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Xiaoya Zheng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Richmond Anaman
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xiaoyan Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Bridget Ataa Fosua
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Shanshan Xiao
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Mingchen Xia
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Chenbing Ai
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Runlan Yu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Xueling Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Yuandong Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Jiaokun Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Erdenechimeg Dolgor
- Department of Chemical and Biological Engineering, School of Engineering and Applied Sciences, National University of Mongolia, 14200, Mongolia
| | - Weimin Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China.
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Takemura Y, Syutsubo K, Kubota K. Suppression of phosphorus release from eutrophic lake sediments by sediment microbial fuel cells. ENVIRONMENTAL TECHNOLOGY 2022; 43:2581-2589. [PMID: 33576727 DOI: 10.1080/09593330.2021.1890837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 02/07/2021] [Indexed: 06/12/2023]
Abstract
Sediment microbial fuel cells (SMFCs) have served as an alternative technique to suppress phosphorus release from lake sediments to water bodies and thus mitigate eutrophication. However, the phosphorus regulation mechanism remains unclear. The purpose of this research was to understand the electrochemical influence of an SMFC on the phosphorus concentration in interstitial water. In this study, a lab-scale SMFC was applied to acetate-spiked sediments (ace+) and unspiked sediments (sed) with closed-circuit (CC)/open-circuit (OC) columns, and the circuitry was switched to investigate the relationship between electron transfer and phosphorus concentration. The dissolved total phosphorus (DTP) concentration in the sediment interstitial water in CC columns significantly decreased to below 0.1 mg/L, whereas the DTP in OC columns remained high for nine weeks. After switching the circuit, the DTP in OC→CC columns dropped but that in CC→OC columns increased within one week. At the end of the experimental period, the DTP concentrations in CC/sed, CC/ace+, OC/sed, and OC/ace+ columns were 0.10 ± 0.02, 0.03 ± 0.00, 0.82 ± 0.01, and 1.66 ± 0.12 mg/L, respectively. The respective estimated anode capacitances of those columns were 2.05 ± 0.49, 5.15 ± 0.14, 0.72 ± 0.19, and 0.71 ± 0.12 nF. We concluded that the phosphorus may have been electrochemically attracted and retained on the anode in the sediment because the adsorbed DTP contents and the increased anode capacitances were strongly correlated. Thus, SMFCs can be used for suppressing phosphorus release from eutrophic lake sediments.
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Affiliation(s)
- Yasuyuki Takemura
- Center for Regional Environmental Research, National Institute for Environmental Studies (NIES), Tsukuba, Japan
| | - Kazuaki Syutsubo
- Center for Regional Environmental Research, National Institute for Environmental Studies (NIES), Tsukuba, Japan
| | - Keiichi Kubota
- Division of Environmental Engineering Science, Faculty of Science and Technology, Gunma University, Kiryu, Japan
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3
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Microbial fuel cells, a renewable energy technology for bio-electricity generation: A mini-review. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.107003] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Cellulose Derived Graphene/Polyaniline Nanocomposite Anode for Energy Generation and Bioremediation of Toxic Metals via Benthic Microbial Fuel Cells. Polymers (Basel) 2020; 13:polym13010135. [PMID: 33396931 PMCID: PMC7795932 DOI: 10.3390/polym13010135] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/19/2020] [Accepted: 12/28/2020] [Indexed: 12/19/2022] Open
Abstract
Benthic microbial fuel cells (BMFCs) are considered to be one of the eco-friendly bioelectrochemical cell approaches nowadays. The utilization of waste materials in BMFCs is to generate energy and concurrently bioremediate the toxic metals from synthetic wastewater, which is an ideal approach. The use of novel electrode material and natural organic waste material as substrates can minimize the present challenges of the BMFCs. The present study is focused on cellulosic derived graphene-polyaniline (GO-PANI) composite anode fabrication in order to improve the electron transfer rate. Several electrochemical and physicochemical techniques are used to characterize the performance of anodes in BMFCs. The maximum current density during polarization behavior was found to be 87.71 mA/m2 in the presence of the GO-PANI anode with sweet potato as an organic substrate in BMFCs, while the GO-PANI offered 15.13 mA/m2 current density under the close circuit conditions in the presence of 1000 Ω external resistance. The modified graphene anode showed four times higher performance than the unmodified anode. Similarly, the remediation efficiency of GO-PANI was 65.51% for Cd (II) and 60.33% for Pb (II), which is also higher than the unmodified graphene anode. Furthermore, multiple parameters (pH, temperature, organic substrate) were optimized to validate the efficiency of the fabricated anode in different environmental atmospheres via BMFCs. In order to ensure the practice of BMFCs at industrial level, some present challenges and future perspectives are also considered briefly.
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Song X, Wang W, Cao X, Wang Y, Zou L, Ge X, Zhao Y, Si Z, Wang Y. Chlorella vulgaris on the cathode promoted the performance of sediment microbial fuel cells for electrogenesis and pollutant removal. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 728:138011. [PMID: 32361353 DOI: 10.1016/j.scitotenv.2020.138011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 03/06/2020] [Accepted: 03/16/2020] [Indexed: 06/11/2023]
Abstract
The lack of electron acceptors in cathode has limited the widespread application of sediment microbial fuel cells (SMFCs). In this study, Chlorella vulgaris (C. vulgaris) was added to the cathode to produce oxygen as an electron acceptor. The synergistic effects between C. vulgaris and electrogenic microorganisms in SMFCs were investigated, and were shown to enhance biodegradation of organic matter in sediments and convert chemical energy into electrical energy. Results showed that the addition of C. vulgaris on the cathode of SMFCs significantly reduced their internal resistance. The low algae concentration SMFC group reduced the initial internal resistance by 67.4% under illumination and produced a maximum power density of 5.17 W/m3, which was 6 times higher than that of SMFCs without addition of C. vulgaris. We also obtained organic matter removal efficiencies 37.2% higher after 16 days, which accelerated the startup time for three times. It was demonstrated that IEF-N and OP, respectively, were forms of nitrogen and phosphorus removed by SMFCs. Additionally, high-throughput sequencing of microbial communities indicated that C. vulgaris increased the abundance of electrogenic bacteria (Geobacter and Desulfobulbaceae) in the anode and types of photosynthetic bacteria that support oxygen production in the cathode. The combined application of microalgae- and SMFC-based technologies offer a promising remediation approach for organically-contaminated sediments.
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Affiliation(s)
- Xinshan Song
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Wenting Wang
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Xin Cao
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China.
| | - Yuhui Wang
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Lixiong Zou
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Xiaoyan Ge
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Yufeng Zhao
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Zhihao Si
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Yifei Wang
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China
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Pang Y, Gu T, Zhang G, Yu Z, Zhou Y, Zhu DZ, Zhang Y, Zhang T. Experimental study on volatile sulfur compound inhibition using a single-chamber membrane-free microbial electrolysis cell. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:30571-30582. [PMID: 32468370 DOI: 10.1007/s11356-020-09325-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/14/2020] [Indexed: 06/11/2023]
Abstract
Odor emissions from sewer systems and wastewater treatment plants have attracted much attention due to the potential negative effects on human health. A single-chamber membrane-free microbial electrolysis cell was proposed for the removal of sulfides in a sewer system. The feasibility of the use of volatile sulfur compounds and their removal efficiency in liquid and headspace gas phases were investigated using synthetic wastewater with real sewer sediment and Ru/Ir-coated titanium electrodes. The results indicate that hydrogen sulfide and volatile organic sulfur compounds were effectively inhibited in the liquid phase upon electrochemical treatment at current densities of 1.55, 2.06, and 2.58 mA/cm2, and their removal rates reached up to 86.2-100%, except for dimethyl trisulfide, the amount of which increased greatly at 1.55 mA/cm2. In addition, the amount of volatile sulfur compounds in the headspace decreased greatly; however, the total theoretical odor concentration was still high, and methanethiol and ethanethiol greatly contributed to the total strength of the odor concentration due to their low odor threshold concentrations. The major pathway for sulfide removal in the single-chamber membrane-free microbial electrolysis cell is biotic oxidation, the removal rate of which was 0.4-0.5 mg/min, 4-5 times that of indirect electrochemical oxidation.
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Affiliation(s)
- Yao Pang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Tianfeng Gu
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Guijiao Zhang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada
| | - Zhiguang Yu
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Yongchao Zhou
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China.
| | - David Z Zhu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 2W2, Canada
| | - Yiping Zhang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Tuqiao Zhang
- The Institute of Municipal Engineering, Zhejiang University, Hangzhou, 310058, China
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Combination of bioelectrochemical systems and electrochemical capacitors: Principles, analysis and opportunities. Biotechnol Adv 2019; 39:107456. [PMID: 31618667 PMCID: PMC7068652 DOI: 10.1016/j.biotechadv.2019.107456] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 08/30/2019] [Accepted: 09/30/2019] [Indexed: 02/06/2023]
Abstract
Bioelectrochemical systems combine electrodes and reactions driven by microorganisms for many different applications. The conversion of organic material in wastewater into electricity occurs in microbial fuel cells (MFCs). The power densities produced by MFCs are still too low for application. One way of increasing their performance is to combine them with electrochemical capacitors, widely used for charge storage purposes. Capacitive MFCs, i.e. the combination of capacitors and MFCs, allow for energy harvesting and storage and have shown to result in improved power densities, which facilitates the up scaling and application of the technology. This manuscript summarizes the state-of-the-art of combining capacitors with MFCs, starting with the theory and working principle of electrochemical capacitors. We address how different electrochemical measurements can be used to determine (bio)electrochemical capacitance and show how the measurement data can be interpreted. In addition, we present examples of the combination of electrochemical capacitors, both internal and external, that have been used to enhance MFC performance. Finally, we discuss the most promising applications and the main existing challenges for capacitive MFCs.
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Lam BR, Rowe AR, Nealson KH. Variation in electrode redox potential selects for different microorganisms under cathodic current flow from electrodes in marine sediments. Environ Microbiol 2018; 20:2270-2287. [PMID: 29786168 DOI: 10.1111/1462-2920.14275] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 12/20/2022]
Abstract
Extracellular electron transport (EET) is a microbial process that allows microorganisms to transport electrons to and from insoluble substrates outside of the cell. Although progress has been made in understanding how microbes transfer electrons to insoluble substrates, the process of receiving electrons has largely remained unexplored. We investigated redox potentials favourable for donating electrons to dissolved and insoluble components in Catalina Harbor marine sediment by combining electrochemical techniques with geochemistry and molecular methods. Working electrodes buried in sediment microcosms were poised at seven redox potentials between -300 and -750 mV versus Ag/AgCl using a three-electrode system. In electrode biofilms recovered after 2-month incubations, overall community diversity increased with more negative redox potentials. Abundances of known EET-capable groups (e.g., Alteromonadales and Desulfuromonadales) varied with redox potential. Motility and chemotaxis genes were found in greater abundance in electrode communities, suggesting a possible selective advantage of these pathways for colonization and utilization of the electrode. Our enrichments demonstrated the validity of this approach in capturing groups known, as well as novel groups (e.g., Campylobacterales) that perform EET. The diverse nature of the enriched cathode communities suggest that insoluble substrate oxidation may be a critical, although poorly described microbial metabolic process in marine sediment.
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Affiliation(s)
- Bonita R Lam
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Annette R Rowe
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, USA
| | - Kenneth H Nealson
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA.,Department of Earth Sciences, University of Southern California, Los Angeles, CA, USA
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Kumar SS, Malyan SK, Basu S, Bishnoi NR. Syntrophic association and performance of Clostridium, Desulfovibrio, Aeromonas and Tetrathiobacter as anodic biocatalysts for bioelectricity generation in dual chamber microbial fuel cell. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:16019-16030. [PMID: 28537018 DOI: 10.1007/s11356-017-9112-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
Anode chamber of a dual chamber microbial fuel cell (MFC) having raw landfill leachate was inoculated with consortium of sulphate-reducing bacteria (SRB) and sulphide-oxidizing bacteria (SOB) to study the phylogenetic architecture, function and mutualism of anolyte community developed in the reactor. Enriched microbial community was analysed with the help of Illumina MiSeq and indicated the dominance of Firmicutes (41.4%), Clostridia (36.4%) and Clostridium (12.9%) at phylum, class and genus level, respectively. Clostridium was associated with fermentation as well as transfer of electrons to the electrode mediated by ferredoxin. Desulfovibrio (6.7%), Aeromonas (6.6%) and Tetrathiobacter (9.8%) were SRB-SOB associated with direct electron transfer to the electrode. Community analysis disclosed a syntrophic association among novel Firmicutes and Proteobacteria species for bioelectricity generation and degradation of organic matter. Complete removal of chemical oxygen demand was observed from landfill leachate within 3 days of inoculation. Lower oxidative slope and polarization resistance revealed from Tafel analysis backed the feasibility of electron transfer from microbes to anodic electrode and thus development of efficient anode-respiring community. Following enrichment and stabilization of the anodic community, maximum power density achieved was 9.15 W/m3 and volumetric current density was 16.17 A/m3. Simultaneous feeding with SRB-SOB and landfill leachate led to the enrichment of a novel, mutually interdependent microbial community capable of synchronized bioremediation of effluents rich in carbon, sulphate, nitrate and aromatic compounds.
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Affiliation(s)
- Smita S Kumar
- Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India
| | - Sandeep K Malyan
- Centre for Environment Science and Climate Resilient Agriculture, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Suddhasatwa Basu
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Narsi R Bishnoi
- Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India.
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Pendyala B, Chaganti SR, Lalman JA, Heath DD. Optimizing the performance of microbial fuel cells fed a combination of different synthetic organic fractions in municipal solid waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 49:73-82. [PMID: 26777306 DOI: 10.1016/j.wasman.2015.12.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 11/25/2015] [Accepted: 12/31/2015] [Indexed: 06/05/2023]
Abstract
The objective of this study was to establish the impact of different steam exploded organic fractions in municipal solid waste (MSW) on electricity production using microbial fuel cells (MFCs). In particular, the influence of individual steam exploded liquefied waste components (food waste (FW), paper-cardboard waste (PCW) and garden waste (GW)) and their blends on chemical oxygen demand (COD) removal, columbic efficiency (CE) and microbial diversity was examined using a mixture design. Maximum power densities from 0.56 to 0.83 W m(-2) were observed for MFCs fed with different feedstocks. The maximum COD removed and minimum CE were observed for a GW feed. However, a reverse trend (minimum COD removed and maximum CE) was observed for the FW feed. A maximum COD removal (78%) accompanied with a maximum CE (24%) was observed for a combined feed of FW, PCW plus GW in a 1:1:1 ratio. Lactate, the major byproduct detected, was unutilized by the anodic biofilm community. The organic fraction of municipal solid waste (OFMSW) could serve as a potential feedstock for electricity generation in MFCs; however, elevated protein levels will lead to reduced COD removal. The microbial communities in cultures fed FW and PCW was highly diversified; however, the communities in cultures fed FW or a feed mixture containing high FW levels were similar and dominated by Bacteroidetes and β-proteobacteria.
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Affiliation(s)
- Brahmaiah Pendyala
- Department of Civil and Environmental Engineering, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada
| | - Subba Rao Chaganti
- Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada
| | - Jerald A Lalman
- Department of Civil and Environmental Engineering, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada; Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada.
| | - Daniel D Heath
- Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada; Department of Biological Sciences, University of Windsor, 401 Sunset Ave., Windsor, ON N9B 3P4, Canada
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11
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Daghio M, Vaiopoulou E, Patil SA, Suárez-Suárez A, Head IM, Franzetti A, Rabaey K. Anodes Stimulate Anaerobic Toluene Degradation via Sulfur Cycling in Marine Sediments. Appl Environ Microbiol 2016; 82:297-307. [PMID: 26497463 PMCID: PMC4702649 DOI: 10.1128/aem.02250-15] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Accepted: 10/17/2015] [Indexed: 11/20/2022] Open
Abstract
Hydrocarbons released during oil spills are persistent in marine sediments due to the absence of suitable electron acceptors below the oxic zone. Here, we investigated an alternative bioremediation strategy to remove toluene, a model monoaromatic hydrocarbon, using a bioanode. Bioelectrochemical reactors were inoculated with sediment collected from a hydrocarbon-contaminated marine site, and anodes were polarized at 0 mV and +300 mV (versus an Ag/AgCl [3 M KCl] reference electrode). The degradation of toluene was directly linked to current generation of up to 301 mA m(-2) and 431 mA m(-2) for the bioanodes polarized at 0 mV and +300 mV, respectively. Peak currents decreased over time even after periodic spiking with toluene. The monitoring of sulfate concentrations during bioelectrochemical experiments suggested that sulfur metabolism was involved in toluene degradation at bioanodes. 16S rRNA gene-based Illumina sequencing of the bulk anolyte and anode samples revealed enrichment with electrocatalytically active microorganisms, toluene degraders, and sulfate-reducing microorganisms. Quantitative PCR targeting the α-subunit of the dissimilatory sulfite reductase (encoded by dsrA) and the α-subunit of the benzylsuccinate synthase (encoded by bssA) confirmed these findings. In particular, members of the family Desulfobulbaceae were enriched concomitantly with current production and toluene degradation. Based on these observations, we propose two mechanisms for bioelectrochemical toluene degradation: (i) direct electron transfer to the anode and/or (ii) sulfide-mediated electron transfer.
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Affiliation(s)
- Matteo Daghio
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
| | - Eleni Vaiopoulou
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium
| | - Sunil A Patil
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium
| | - Ana Suárez-Suárez
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Ian M Head
- School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Andrea Franzetti
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
| | - Korneel Rabaey
- Laboratory of Microbial Ecology and Technology, Ghent University, Ghent, Belgium
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12
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Goto Y, Yoshida N, Umeyama Y, Yamada T, Tero R, Hiraishi A. Enhancement of electricity production by graphene oxide in soil microbial fuel cells and plant microbial fuel cells. Front Bioeng Biotechnol 2015; 3:42. [PMID: 25883931 PMCID: PMC4381712 DOI: 10.3389/fbioe.2015.00042] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 03/16/2015] [Indexed: 11/13/2022] Open
Abstract
The effects of graphene oxide (GO) on electricity generation in soil microbial fuel cells (SMFCs) and plant microbial fuel cell (PMFCs) were investigated. GO at concentrations ranging from 0 to 1.9 g⋅kg(-1) was added to soil and reduced for 10 days under anaerobic incubation. All SMFCs (GO-SMFCs) utilizing the soils incubated with GO produced electricity at a greater rate and in higher quantities than the SMFCs which did not contain GO. In fed-batch operations, the overall average electricity generation in GO-SMFCs containing 1.0 g⋅kg(-1) of GO was 40 ± 19 mW⋅m(-2), which was significantly higher than the value of 6.6 ± 8.9 mW⋅m(-2) generated from GO-free SMFCs (p < 0.05). The increase in catalytic current at the oxidative potential was observed by cyclic voltammetry (CV) for GO-SMFC, with the CV curve suggesting the enhancement of electron transfer from oxidation of organic substances in the soil by the reduced form of GO. The GO-containing PMFC also displayed a greater generation of electricity compared to the PMFC with no added GO, with GO-PMFC producing 49 mW⋅m(-2) of electricity after 27 days of operation. Collectively, this study demonstrates that GO added to soil can be microbially reduced in soil, and facilitates electron transfer to the anode in both SMFCs and PMFCs.
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Affiliation(s)
- Yuko Goto
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Department of Biomedical Science, College of Life and Health Science, Chubu University , Kasugai, Aichi , Japan
| | - Naoko Yoshida
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Center for Fostering Young and Innovative Researchers, Nagoya Institute of Technology , Nagoya, Aichi , Japan
| | - Yuto Umeyama
- Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
| | - Takeshi Yamada
- Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
| | - Ryugo Tero
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
| | - Akira Hiraishi
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology , Toyohashi, Aichi , Japan ; Department of Environmental and Life Sciences, Toyohashi University of Technology , Toyohashi, Aichi , Japan
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13
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Wang H, Park JD, Ren ZJ. Practical energy harvesting for microbial fuel cells: a review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:3267-77. [PMID: 25670167 DOI: 10.1021/es5047765] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The microbial fuel cell (MFC) technology offers sustainable solutions for distributed power systems and energy positive wastewater treatment, but the generation of practically usable power from MFCs remains a major challenge for system scale up and application. Commonly used external resistors will not harvest any usable energy, so energy-harvesting circuits are needed for real world applications. This review summarizes, explains, and discusses the different energy harvesting methods, components, and systems that can extract and condition the MFC energy for direct utilization. This study aims to assist environmental scientists and engineers to gain fundamental understandings of these electronic systems and algorithms, and it also offers research directions and insights on how to overcome the barriers, so the technology can be further advanced and applied in larger scale.
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Affiliation(s)
- Heming Wang
- †Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Jae-Do Park
- ‡Department of Electrical Engineering, University of Colorado Denver, Denver, Colorado 80204, United States
| | - Zhiyong Jason Ren
- †Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
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14
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Velvizhi G, Venkata Mohan S. Bioelectrogenic role of anoxic microbial anode in the treatment of chemical wastewater: microbial dynamics with bioelectro-characterization. WATER RESEARCH 2015; 70:52-63. [PMID: 25506763 DOI: 10.1016/j.watres.2014.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 10/29/2014] [Accepted: 11/02/2014] [Indexed: 06/04/2023]
Abstract
A membrane-less anoxic bioelectrochemical treatment (AxBET) system was evaluated to study the influence of bioelectrogenic activity during the treatment of chemical wastewater (CW). Increment in power generation was observed with increase in substrate loading (61-204 mW/m(2)) indicating the ability of anodic bacteria in BET system to utilize the complex chemicals as the sole carbon source. Derivative analysis of voltammograms depicted by positive and negative peak potentials which relate to the extracellular electron transport sites (EETs) that presumably play a significant role in electron transfer. These self-driven redox mediators varied with respect to the substrate load. The microbial population was dominated by anaerobic microorganisms which are commonly involved in effluent treatment plants during the initial phase of operation. A gradual shift in the microbial community was observed towards enrichment of electrogenically active bacteria belonging to phyla viz., Firmicutes and Proteobacteria after prolonged operation. Shannon Index and principal component analysis correlated with the microbial profile studies. The feasibility of self-driven bioremediation of chemical wastewater in an AxBET system demonstrated bioelectricity production along with multipollutant removal simultaneously.
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Affiliation(s)
- G Velvizhi
- Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
| | - S Venkata Mohan
- Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
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15
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Application of benthonic microbial fuel cells and electro-Fenton process to dye decolourisation. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.12.075] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Redox reaction characteristics of riboflavin: A fluorescence spectroelectrochemical analysis and density functional theory calculation. Bioelectrochemistry 2014; 98:103-8. [DOI: 10.1016/j.bioelechem.2014.03.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 03/13/2014] [Accepted: 03/21/2014] [Indexed: 11/23/2022]
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17
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Lee DJ, Liu X, Weng HL. Sulfate and organic carbon removal by microbial fuel cell with sulfate-reducing bacteria and sulfide-oxidising bacteria anodic biofilm. BIORESOURCE TECHNOLOGY 2014; 156:14-19. [PMID: 24480414 DOI: 10.1016/j.biortech.2013.12.129] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 12/28/2013] [Accepted: 12/30/2013] [Indexed: 06/03/2023]
Abstract
Biological sulfur removal can be achieved by reducing sulfate to sulfide with sulfate-reducing bacteria (SRB) and then oxidising sulfide to elemental sulfur (S(0)) with sulfide oxidising bacteria (SOB) for recovery. In sulfate-carbon wastewaters lacking electron acceptor for sulfide, excess sulfide will be produced and accumulated in the reactor. This study applied the microbial fuel cell (MFC) cultivated with the SRB+SOB anodic biofilm for treating the sulfate+organic carbon wastewaters. Excess sulfate ions were efficiently converted to sulfide by SRB cells in the biofilm, while the formed sulfide was diffused to the neighboring SOB cells to be irreversibly converted to S(0) with produced electrons being transferred to the anode. The cell-cell sulfide transport principally determined the electron flux of the MFC. Short diffusional distance of sulfide ions between cells significantly reduced the polarization resistances, hence enhancing performance of the MFC.
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Affiliation(s)
- Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
| | - Xiang Liu
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Hsiang-Ling Weng
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
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18
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Zhang T, Bain TS, Barlett MA, Dar SA, Snoeyenbos-West OL, Nevin KP, Lovley DR. Sulfur oxidation to sulfate coupled with electron transfer to electrodes by Desulfuromonas strain TZ1. Microbiology (Reading) 2014; 160:123-129. [DOI: 10.1099/mic.0.069930-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Microbial oxidation of elemental sulfur with an electrode serving as the electron acceptor is of interest because this may play an important role in the recovery of electrons from sulfidic wastes and for current production in marine benthic microbial fuel cells. Enrichments initiated with a marine sediment inoculum, with elemental sulfur as the electron donor and a positively poised (+300 mV versus Ag/AgCl) anode as the electron acceptor, yielded an anode biofilm with a diversity of micro-organisms, including Thiobacillus, Sulfurimonas, Pseudomonas, Clostridium and Desulfuromonas species. Further enrichment of the anode biofilm inoculum in medium with elemental sulfur as the electron donor and Fe(III) oxide as the electron acceptor, followed by isolation in solidified sulfur/Fe(III) medium yielded a strain of Desulfuromonas, designated strain TZ1. Strain TZ1 effectively oxidized elemental sulfur to sulfate with an anode serving as the sole electron acceptor, at rates faster than Desulfobulbus propionicus, the only other organism in pure culture previously shown to oxidize S° with current production. The abundance of Desulfuromonas species enriched on the anodes of marine benthic fuel cells has previously been interpreted as acetate oxidation driving current production, but the results presented here suggest that sulfur-driven current production is a likely alternative.
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Affiliation(s)
- Tian Zhang
- Department of Microbiology, University of Massachusetts, Amherst, MA, USA
| | - Timothy S. Bain
- Department of Microbiology, University of Massachusetts, Amherst, MA, USA
| | - Melissa A. Barlett
- Department of Microbiology, University of Massachusetts, Amherst, MA, USA
| | - Shabir A. Dar
- Department of Microbiology, University of Massachusetts, Amherst, MA, USA
| | | | - Kelly P. Nevin
- Department of Microbiology, University of Massachusetts, Amherst, MA, USA
| | - Derek R. Lovley
- Department of Microbiology, University of Massachusetts, Amherst, MA, USA
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19
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Ieropoulos I, Gálvez A, Greenman J. Effects of sulphate addition and sulphide inhibition on microbial fuel cells. Enzyme Microb Technol 2013. [PMID: 23199736 DOI: 10.1016/j.enzmictec.2012.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The effects of adding sulphate in: (i) standard activated sludge microbial fuel cells (MFCs) and (ii) larger-scale leachate-treating columns - both as individual units and as a system connected in cascade - are reported. S-replete power output was ∼2-fold higher than that of the S-deplete MFC. Furthermore, the effects of evolved sulphide (S(2-)) inhibition were investigated. The overall decrease in power output from the sulphide inhibitor (Na(2)MoO(4)) additions was 83% for the S-replete and 90% for the S-deplete. The second phase with the leachate treating units shows an improvement of 32-86% (depended on leachate strength) in current output as a result of adding sulphate. When leachate column MFCs were connected fluidically in series, the amount of Na(2)SO(4) made available downstream was decreasing (increase in power was 99%, 40% and 12% for columns in cascade). Results demonstrated the beneficial effects of added sulphur sources to both activated sludge and leachate-treating MFCs.
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Affiliation(s)
- I Ieropoulos
- Bristol Robotics Laboratory, Environment and Technology Faculty, University of the West of England, Frenchay Campus, Coldharbour Lane, Bristol BS16 1QY, UK.
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20
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Gong Y, Ebrahim A, Feist AM, Embree M, Zhang T, Lovley D, Zengler K. Sulfide-driven microbial electrosynthesis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:568-73. [PMID: 23252645 DOI: 10.1021/es303837j] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Microbial electrosynthesis, the conversion of carbon dioxide to organic molecules using electricity, has recently been demonstrated for acetogenic microorganisms, such as Sporomusa ovata. The energy for reduction of carbon dioxide originates from the hydrolysis of water on the anode, requiring a sufficiently low potential. Here we evaluate the use of sulfide as an electron source for microbial electrosynthesis. Abiotically oxidation of sulfide on the anode yields two electrons. The oxidation product, elemental sulfur, can be further oxidized to sulfate by Desulfobulbus propionicus, generating six additional electrons in the process. The eight electrons generated from the combined abiotic and biotic steps were used to reduce carbon dioxide to acetate on a graphite cathode by Sporomusa ovata at a rate of 24.8 mmol/day · m(2). Using a strain of Desulfuromonas as biocatalyst on the anode resulted in an acetate production rate of 49.9 mmol/day · m(2), with a Coulombic efficiency of over 90%. These results demonstrate that sulfide can serve effectively as an alternative electron donor for microbial electrosynthesis.
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Affiliation(s)
- Yanming Gong
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093, United States
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21
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Lee DJ, Lee CY, Chang JS. Treatment and electricity harvesting from sulfate/sulfide-containing wastewaters using microbial fuel cell with enriched sulfate-reducing mixed culture. JOURNAL OF HAZARDOUS MATERIALS 2012; 243:67-72. [PMID: 23116719 DOI: 10.1016/j.jhazmat.2012.09.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 09/27/2012] [Accepted: 09/28/2012] [Indexed: 06/01/2023]
Abstract
Anaerobic treatment of sulfate-laden wastewaters can produce excess sulfide, which is corrosive to pipelines and is toxic to incorporated microorganisms. This work started up microbial fuel cell (MFC) using enriched sulfate-reducing mixed culture as anodic biofilms and applied the so yielded MFC for treating sulfate or sulfide-laden wastewaters. The sulfate-reducing bacteria in anodic biofilm effectively reduced sulfate to sulfide, which was then used by neighboring anode respiring bacteria (ARB) as electron donor for electricity production. The presence of organic carbons enhanced MFC performance since the biofilm ARB were mixotrophs that need organic carbon to grow. The present device introduces a route for treating sulfate laden wastewaters with electricity harvesting.
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Affiliation(s)
- Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan.
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22
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Gardel EJ, Nielsen ME, Grisdela PT, Girguis PR. Duty cycling influences current generation in multi-anode environmental microbial fuel cells. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:5222-5229. [PMID: 22497491 DOI: 10.1021/es204622m] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Improving microbial fuel cell (MFC) performance continues to be the subject of research, yet the role of operating conditions, specifically duty cycling, on MFC performance has been modestly addressed. We present a series of studies in which we use a 15-anode environmental MFC to explore how duty cycling (variations in the time an anode is connected) influences cumulative charge, current, and microbial composition. The data reveal particular switching intervals that result in the greatest time-normalized current. When disconnection times are sufficiently short, there is a striking decrease in current due to an increase in the overall electrode reaction resistance. This was observed over a number of whole cell potentials. Based on these results, we posit that replenishment of depleted electron donors within the biofilm and surrounding diffusion layer is necessary for maximum charge transfer, and that proton flux may be not limiting in the highly buffered aqueous phases that are common among environmental MFCs. Surprisingly, microbial diversity analyses found no discernible difference in gross community composition among duty cycling treatments, suggesting that duty cycling itself has little or no effect. Such duty cycling experiments are valuable in determining which factors govern performance of bioelectrochemical systems and might also be used to optimize field-deployed systems.
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Affiliation(s)
- Emily J Gardel
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street Cambridge, Massachusetts 02138, USA
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23
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Gong Y, Radachowsky SE, Wolf M, Nielsen ME, Girguis PR, Reimers CE. Benthic microbial fuel cell as direct power source for an acoustic modem and seawater oxygen/temperature sensor system. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:5047-5053. [PMID: 21545151 DOI: 10.1021/es104383q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Supported by the natural potential difference between anoxic sediment and oxic seawater, benthic microbial fuel cells (BMFCs) promise to be ideal power sources for certain low-power marine sensors and communication devices. In this study a chambered BMFC with a 0.25 m(2) footprint was used to power an acoustic modem interfaced with an oceanographic sensor that measures dissolved oxygen and temperature. The experiment was conducted in Yaquina Bay, Oregon over 50 days. Several improvements were made in the BMFC design and power management system based on lessons learned from earlier prototypes. The energy was harvested by a dynamic gain charge pump circuit that maintains a desired point on the BMFC's power curve and stores the energy in a 200 F supercapacitor. The system also used an ultralow power microcontroller and quartz clock to read the oxygen/temperature sensor hourly, store data with a time stamp, and perform daily polarizations. Data records were transmitted to the surface by the acoustic modem every 1-5 days after receiving an acoustic prompt from a surface hydrophone. After jump-starting energy production with supplemental macroalgae placed in the BMFC's anode chamber, the average power density of the BMFC adjusted to 44 mW/m(2) of seafloor area which is better than past demonstrations at this site. The highest power density was 158 mW/m(2), and the useful energy produced and stored was ≥ 1.7 times the energy required to operate the system.
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Affiliation(s)
- Yanming Gong
- College of Oceanic & Atmospheric Sciences, Hatfield Marine Science Center, Oregon State University, Newport, Oregon 97365, USA
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24
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Song TS, Yan ZS, Zhao ZW, Jiang HL. Construction and operation of freshwater sediment microbial fuel cell for electricity generation. Bioprocess Biosyst Eng 2011; 34:621-7. [DOI: 10.1007/s00449-010-0511-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 12/29/2010] [Indexed: 10/18/2022]
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25
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Girguis PR, Nielsen ME, Figueroa I. Harnessing energy from marine productivity using bioelectrochemical systems. Curr Opin Biotechnol 2010; 21:252-8. [DOI: 10.1016/j.copbio.2010.03.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Revised: 03/18/2010] [Accepted: 03/18/2010] [Indexed: 11/28/2022]
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