Accelerated start-up of two-chambered microbial fuel cells: Effect of anodic positive poised potential

Wang, Xin; Feng, Yujie; Ren, Nanqi; Wang, Heming; Lee, He; Li, Nan; Zhao, Qingliang

doi:10.1016/j.electacta.2008.07.085

Cited by 225 publications

(105 citation statements)

References 28 publications

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“…This IR drop may not only introduce errors in the measurements electrochemically, but also can result in biological changes in the bioanodes. When anodes in MFCs were acclimated to different set anode potentials they showed differences in startup time, power production, and electrochemical performance (Sun et al, 2012;Torres et al, 2009;Wang et al, 2009;Zhang et al, 2013;Zhu et al, 2013), likely due to the selection of different bacteria species with different anode potentials during the acclimation. Even with pure cultures the set potential can alter expression of different electron transport systems, thus affecting the actual reactions (Dumas et al, 2008;Wei et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Reference and counter electrode positions affect electrochemical characterization of bioanodes in different bioelectrochemical systems

Zhang

Liu²,

Ivanov³

et al. 2014

Biotech & Bioengineering

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The placement of the reference electrode (RE) in various bioelectrochemical systems is often varied to accommodate different reactor configurations. While the effect of the RE placement is well understood from a strictly electrochemistry perspective, there are impacts on exoelectrogenic biofilms in engineered systems that have not been adequately addressed. Varying distances between the working electrode (WE) and the RE, or the RE and the counter electrode (CE) in microbial fuel cells (MFCs) can alter bioanode characteristics. With well-spaced anode and cathode distances in an MFC, increasing the distance between the RE and anode (WE) altered bioanode cyclic voltammograms (CVs) due to the uncompensated ohmic drop. Electrochemical impedance spectra (EIS) also changed with RE distances, resulting in a calculated increase in anode resistance that varied between 17 and 31 V (À0.2 V). While WE potentials could be corrected with ohmic drop compensation during the CV tests, they could not be automatically corrected by the potentiostat in the EIS tests. The electrochemical characteristics of bioanodes were altered by their acclimation to different anode potentials that resulted from varying the distance between the RE and the CE (cathode). These differences were true changes in biofilm characteristics because the CVs were electrochemically independent of conditions resulting from changing CE to RE distances. Placing the RE outside of the current path enabled accurate bioanode characterization using CVs and EIS due to negligible ohmic resistances (0.4 V). It is therefore concluded for bioelectrochemical systems that when possible, the RE should be placed outside the current path and near the WE, as this will result in more accurate representation of bioanode characteristics.

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Section: Introductionmentioning

confidence: 99%

Reference and counter electrode positions affect electrochemical characterization of bioanodes in different bioelectrochemical systems

Zhang

Liu²,

Ivanov³

et al. 2014

Biotech & Bioengineering

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“…KCl based on the results reported by Wang et al [12] and Touch et al [8]. These researchers showed that a positive potential of 200 mV could increase the electrochemical activity of the anodic biological community during start-up.…”

Section: B System Operation and Sediment Analysismentioning

confidence: 99%

Changing Organic Matter Characteristics of Littoral Sediment by Solar Cell-Combined Sediment Microbial Fuel Cell

Touch¹,

Takata²,

Yamaji³

et al. 2018

IJESD

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Abstract-Metal ion or clay mineral-adsorbed organic matter present in littoral sediment is known as hardly decomposed organic matter, which is difficult to use as a natural resource. This study is aimed at changing the organic matter characteristics of littoral sediment through the application of solar cell-combined sediment microbial fuel cell (SC-SMFC). The experimental results showed that the sediment pH decreases and the concentration of metal ions in the sediment pore water increases after the application of SC-SMFC. This suggests the dissociation of metal complexes in the sediment. From the analysis results of organic matter characteristics, variations in the ignition characteristics of the sediment and the absorbance at wave number ranges of 3300-3800 and 800-1800 cm -1 were confirmed, indicating changes in organic matter characteristics of the sediment. It can be concluded that SC-SMFC can separate organic matter from metal complexes, leading to the transformation of organic matter in sediment from valueless into a useful product.

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“…G. sulfurreducens is a dominant exoelectrogenic strain of the anode biofilm in this tested MFC system. 1,7,19,[24][25][26][27] Because G. sulfurreducens utilize acetylCoA transferase or acetate kinase coupled with phosphate transacetylase to initially activate acetate into acetyl-CoA for the sequential central metabolism, 28 acetate could be utilized as an electron donor preferentially and activation overpotential also could be minimized.…”

mentioning

confidence: 99%

Impedance and Thermodynamic Analysis of Bioanode, Abiotic Anode, and Riboflavin-Amended Anode in Microbial Fuel Cells

Kim

Ahn

et al. 2012

Bulletin of the Korean Chemical Society

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Understanding exoelectrogenic reactions of the bioanode is limited due to its complexity and the absence of analytics. Impedance and thermodynamics of bioanode, abiotic anode, and riboflavin-amended anode were evaluated. Activation overpotential of the bioanode was negligible compared with that of the abiotic anode. Impedance spectroscopy shows that the bioanode had much lower charge transfer resistance and higher capacitance than the abiotic anode in low frequency reaction. In high frequency reaction, the impedance parameters, however, were relatively similar between the bioanode and the abiotic anode. At open-circuit impedance spectroscopy, a high frequency arc was not detected in the abiotic anode in Nyquist plot. Addition of riboflavin induced a phase angle shift and created curvature in high-frequency arc of the abiotic anode, and it also drastically changed impedance spectra of the bioanode.

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Accelerated start-up of two-chambered microbial fuel cells: Effect of anodic positive poised potential

Cited by 225 publications

References 28 publications

Reference and counter electrode positions affect electrochemical characterization of bioanodes in different bioelectrochemical systems

Reference and counter electrode positions affect electrochemical characterization of bioanodes in different bioelectrochemical systems

Changing Organic Matter Characteristics of Littoral Sediment by Solar Cell-Combined Sediment Microbial Fuel Cell

Impedance and Thermodynamic Analysis of Bioanode, Abiotic Anode, and Riboflavin-Amended Anode in Microbial Fuel Cells

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