Sediment microbial fuel cell prefers to degrade organic chemicals with higher polarity

Xia, Chunyu; Xu, Meiying; Jin, Liu; Guo, Jun; Yang, Yonggang

doi:10.1016/j.biortech.2015.04.072

Cited by 51 publications

(24 citation statements)

References 16 publications

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“…In contrast, our results indicated that the ENCP from OMC-free microbes (e.g., fermentation microbes) could also contribute to EET via electron mediators. Moreover, the contribution of OMC-free microbe in electricity generation could partially explain a repeatedly reported phenomenon that scarce or even no typical electricity generating microbes could be founded in the anode microbial communities of many well-performed BESs (Xia et al, 2015; Xiao et al, 2015). …”

Section: Resultsmentioning

confidence: 93%

Electricity Generation by Shewanella decolorationis S12 without Cytochrome c

Yang

Kong²,

Chen

et al. 2017

Front. Microbiol.

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Bacterial extracellular electron transfer (EET) plays a key role in various natural and engineering processes. Outer membrane c-type cytochromes (OMCs) are considered to be essential in bacterial EET. However, most bacteria do not have OMCs but have redox proteins other than OMCs in their extracellular polymeric substances of biofilms. We hypothesized that these extracellular non-cytochrome c proteins (ENCP) could contribute to EET, especially with the facilitation of electron mediators. This study compared the electrode respiring capacity of wild type Shewanella decolorationis S12 and an OMC-deficient mutant. Although the OMC-deficient mutant was incapable in direct electricity generation in normal cultivation, it regained electricity generation capacity (26% of the wide type) with the aid of extracellular electron mediator (riboflavin). Further bioelectrochemistry and X-ray photoelectron spectroscopy analysis suggested that the ENCP, such as proteins with Fe–S cluster, may participate in the falvin-mediated EET. The results highlighted an important and direct role of the ENCP, generated by either electricigens or other microbes, in natural microbial EET process with the facilitation of electron mediators.

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Section: Resultsmentioning

confidence: 93%

Electricity Generation by Shewanella decolorationis S12 without Cytochrome c

Yang

Kong²,

Chen

et al. 2017

Front. Microbiol.

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“…Around both the anode and cathode, copper wires are tangled because they are very good electrical conductors. For the SMFCs to be efficient, a multianode system is typically used; approximately 11 anodes are sufficient for a single cathode . Thus, both electrodes are connected with the external circuit that is attached to a multimeter data logger to monitor the system.…”

Section: Sediment Microbial Fuel Cellsmentioning

confidence: 99%

A review on sediment microbial fuel cells as a new source of sustainable energy and heavy metal remediation: mechanisms and future prospective

Abbas

Rafatullah

Ismail

et al. 2017

Int. J. Energy Res.

125

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Summary Sediment microbial fuel cells (SMFCs) are different from microbial fuel cells because they are completely anoxic and lack a membrane. SMFCs are a novel technology for the simultaneous production of renewable energy and bioremediation of heavy metals. Recently, SMFCs have attracted the attention of many researchers because of their moderate functioning parameters and ability to use a range of biodegradable substrates like glucose, glutamic acid, river water, cysteine, acetate, and starch. The inocula used in SMFCs include river sediment, marine sediment, and wastewater. For power generation, many exoelectrogens in SMFCs have the ability to transfer electrons from electrodes by using natural electron shuttles. Exoelectrogens use four primary pathways to transfer electrons to the electrodes, including short‐range electron transfer through redox‐active proteins, soluble electron shuttling molecules, long‐range electron transport by conductive pili, and direct interspecies electron transfer. The most dominant mechanism is long‐range electron transfer via conductive pili because pili have metal‐like conductivity. The powering by microbes is an emerging technique for the remediation of heavy metals from sediments. The pathways for transferring electrons in electrotrophs operate in the opposite direction from those in exoelectrogens. To further upgrade SMFC technology, this review targets the prototype, operating factors, working mechanisms, applications, and future perspectives of SMFCs. Copyright © 2017 John Wiley & Sons, Ltd.

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“…[23b,48] Thei nherent characteristics of the compound is one of the decisive factors,a nd involves hydrophilicity,p olarity,a nd molecular weight. [12,49] Additionally,s oil conditions, for example,s oil type,t emperature,p H, water content, salt content,o rganic matter, available nutrientsi nt he soil, and soil permeability, [6,50] are vital factors for the applicationo f as oil bioelectrochemical remediation system. [7d, 20b,28] Thus,t o avoid nutrient limitations on bacterial growth, some nitrogen (e.g.,N H 4 Cl or (NH 4 ) 2 SO 4 )a nd phosphorus (e.g.,K 2 HPO 4 , Na 2 HPO 4 or NaH 2 PO 4 )w as added to obtain an optimal ratio of C/N/P of 100:10:1.…”

Section: Othersmentioning

confidence: 99%

Microbial Fuel Cells for Organic‐Contaminated Soil Remedial Applications: A Review

Wang

Weng

et al. 2017

Energy Tech

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Efficient noninvasive techniques are desired for repairing organic‐contaminated soils. Bioelectrochemical technology, especially microbial fuel cells (MFCs), has been widely used to promote a polluted environmental remediation approach, and applications include wastewater, sludge, sediment, and soil remediation. Soil MFC remediation has been of significant concern in recent years, and thus, several aspects, including reactor configuration, electrode materials, soil conductivity, mass transfer, and microbial activity, are reviewed. Recent studies and key issues of soil MFCs and perspectives of organic‐contamination remedial application are summarized, with the aim of assisting environmental scholars and engineers to gain a comprehensive understanding of MFC remediation. Insights are also offered on how to extend applications to help soil MFC remediation technology to advance and be applied in the future on a large scale.

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Sediment microbial fuel cell prefers to degrade organic chemicals with higher polarity

Cited by 51 publications

References 16 publications

Electricity Generation by Shewanella decolorationis S12 without Cytochrome c

Electricity Generation by Shewanella decolorationis S12 without Cytochrome c

A review on sediment microbial fuel cells as a new source of sustainable energy and heavy metal remediation: mechanisms and future prospective

Microbial Fuel Cells for Organic‐Contaminated Soil Remedial Applications: A Review

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