Microbial Fuel Cells:  Methodology and Technology

Logan, Bruce E.; Hamelers, H.V.M.; Rozendal, René A.; Schröder, Uwe; Keller, Jürg; Freguia, Stefano; Aelterman, Peter; Verstraete, Willy; Rabaey, Korneel

doi:10.1021/es0605016

Cited by 5,126 publications

(3,110 citation statements)

References 69 publications

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“…11 % for the bio‐electrochemical hydrogen production process reported by Kreysa et al.) 49, 50, 51, 52, 53…”

Section: Bioelectrochemical Systemsmentioning

confidence: 99%

“…However, these processes are still at an early stage of development. Challenges arising on scale‐up, possible migration between the anodic and cathodic compartments, as well as the lifetime of the catalyst are just a few issues to mention 50, 51, 55, 56. Furthermore, reduction of CO 2 leads to rather low‐value products such as methane, the biofuels ethanol and butanol, or carboxylates such as acetate or butyrate 51, 52, 55, 56, 57.…”

Section: Bioelectrochemical Systemsmentioning

confidence: 99%

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Modern Electrochemical Aspects for the Synthesis of Value‐Added Organic Products

et al. 2018

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The use of electricity instead of stoichiometric amounts of oxidizers or reducing agents in synthesis is very appealing for economic and ecological reasons, and represents a major driving force for research efforts in this area. To use electron transfer at the electrode for a successful transformation in organic synthesis, the intermediate radical (cation/anion) has to be stabilized. Its combination with other approaches in organic chemistry or concepts of contemporary synthesis allows the establishment of powerful synthetic methods. The aim in the 21st Century will be to use as little fossil carbon as possible and, for this reason, the use of renewable sources is becoming increasingly important. The direct conversion of renewables, which have previously mainly been incinerated, is of increasing interest. This Review surveys many of the recent seminal important developments which will determine the future of this dynamic emerging field.

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“…11 % for the bio‐electrochemical hydrogen production process reported by Kreysa et al.) 49, 50, 51, 52, 53…”

Section: Bioelectrochemical Systemsmentioning

confidence: 99%

Section: Bioelectrochemical Systemsmentioning

confidence: 99%

Modern Electrochemical Aspects for the Synthesis of Value‐Added Organic Products

et al. 2018

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“…All operations were carried out by applying appropriate In MFC experiments, current was calculated from the voltage drop across the external resistor according to Ohm's law. Current density, power density and charge produced were calculated according to Logan et al 29 , while cathodic efficiency was calculated based on the fraction of electrons transferred to Cr(VI) from the cathode. Formulas are presented in SI.…”

Section: Fuel Cell Operation Potentiostatically Controlled Cells Pomentioning

confidence: 99%

Enhanced Performance of Hexavalent Chromium Reducing Cathodes in the Presence ofShewanella oneidensisMR-1 and Lactate

Xafenias

Zhang

Banks

2013

Environ. Sci. Technol.

130

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Biocathodes for the reduction of the highly toxic hexavalent chromium (Cr(VI)) were investigated using Shewanella oneidensis MR-1 (MR-1) as a bio-catalyst and performance was assessed in terms of current production and Cr(VI) reduction. Potentiostatically controlled experiments (-500 mV vs. Ag/AgCl) showed that a mediatorless MR-1 biocathode started up 2 under aerated conditions in the presence of lactate, received 5.5 and 1.7 times more electrons for Cr(VI) reduction over a 4-hour operating period than controls without lactate and with lactate but without MR-1, respectively. Cr(VI) reduction was also enhanced, with a decrease in concentration over the 4-h operating period of 9 mg/L Cr(VI), compared to only 1 and 3 mg/L respectively in the controls. Riboflavin, an electron shuttle mediator naturally produced by MR-1, was also found to have a positive impact in potentiostatically controlled cathodes. Additionally, a microbial fuel cell (MFC) with MR-1 and lactate present in both anode and cathode produced a maximum current density of 32.5 mA/m 2 (1,000 Ω external load) after receiving a 10 mg/L Cr(VI) addition in the cathode, and cathodic efficiency increased steadily over an 8-day operation period with successive Cr(VI) additions. In conclusion, effective and continuous Cr(VI) reduction with associated current production were achieved when MR-1 and lactate were both present in the biocathodes. INTRODUCTIONHexavalent chromium (Cr(VI)) is a highly toxic, mutagenic and carcinogenic substance that is present in the effluent streams of a wide range of industrial processes, including electroplating, leather tanning and wood preserving 1 . It is highly soluble and, because of its long history of use and often its disposal after inappropriate or no treatment, it has become one of the most abundant inorganic contaminants in groundwater. Ideally Cr(VI) should be removed from groundwater in the natural environment, and because of the inherent dangers to health the stringent guideline limit of 50 μg/L has been issued for total chromium concentration in drinking water 1,2 . Removal options include ion-exchange, adsorption and electrodialysis 3 ; however in many of these applications chromium keeps its toxic hexavalent state. Reduction of Cr(VI) to the considerably 3 less toxic trivalent form Cr(III) and its subsequent precipitation at neutral pH could be considered a more effective remediation strategy 4 .A possible method for Cr(VI) reduction using a microbial fuel cell (MFC) has recently been proposed, where Cr(VI) was used as an oxidant in the cathode to generate an electrical energy output 5,6 . At low pH values where H + is abundant, cathodic Cr(VI) reduction has been demonstrated at relatively fast rates and without the use of a catalyst 5,6 . In the neutral pH region, however, the reaction kinetics are slower due to low H + availability:CrO 4 2-+ 8H + + 3e -= Cr 3+ + 4H 2 O (1) At neutral pH, Cr(VI) reduction takes place under lower cathode potentials and is also severely inhibited by Cr(III) oxyhydroxide monolayers w...

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“…In BESs, microorganisms catalyze the electrochemical formation or degradation of organic molecules by interfacing their biological metabolism with an electrode 1, 2, 3. The interaction between microorganisms and electrical conductive structures makes these systems unique and versatile, with potential applications in electrical energy storage,4, 5 energy‐ and nutrient‐recovering wastewater treatment systems,6, 7, 8 production of high‐value chemical commodities,9, 10 long‐term off‐grid low‐power electricity generation,11, 12 and the development of highly specific and innovative biosensors 13, 14. Additionally, microorganisms may provide temporal charge storage within the microbial cell 15, 16, 17.…”

Section: Introductionmentioning

confidence: 99%

In situ Biofilm Quantification in Bioelectrochemical Systems by using Optical Coherence Tomography

Molenaar

Sleutels²,

Pereirã³

et al. 2018

ChemSusChem

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Detailed studies of microbial growth in bioelectrochemical systems (BESs) are required for their suitable design and operation. Here, we report the use of optical coherence tomography (OCT) as a tool for in situ and noninvasive quantification of biofilm growth on electrodes (bioanodes). An experimental platform is designed and described in which transparent electrodes are used to allow real‐time, 3D biofilm imaging. The accuracy and precision of the developed method is assessed by relating the OCT results to well‐established standards for biofilm quantification (chemical oxygen demand (COD) and total N content) and show high correspondence to these standards. Biofilm thickness observed by OCT ranged between 3 and 90 μm for experimental durations ranging from 1 to 24 days. This translated to growth yields between 38 and 42 mgCODbiomass gCODacetate −1 at an anode potential of −0.35 V versus Ag/AgCl. Time‐lapse observations of an experimental run performed in duplicate show high reproducibility in obtained microbial growth yield by the developed method. As such, we identify OCT as a powerful tool for conducting in‐depth characterizations of microbial growth dynamics in BESs. Additionally, the presented platform allows concomitant application of this method with various optical and electrochemical techniques.

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Microbial Fuel Cells: Methodology and Technology

Cited by 5,126 publications

References 69 publications

Modern Electrochemical Aspects for the Synthesis of Value‐Added Organic Products

Modern Electrochemical Aspects for the Synthesis of Value‐Added Organic Products

Enhanced Performance of Hexavalent Chromium Reducing Cathodes in the Presence ofShewanella oneidensisMR-1 and Lactate

In situ Biofilm Quantification in Bioelectrochemical Systems by using Optical Coherence Tomography

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