Effects of anode potentials on bioelectrogenic conversion of xylose and microbial community compositions

Kokko, Marika; Mäkinen, Annukka E.; Sulonen, Mira L.K.; Puhakka, Jaakko A.

doi:10.1016/j.bej.2015.06.007

Cited by 11 publications

(4 citation statements)

References 25 publications

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“…The anode potential regulates the growth and electrochemical activity of the microorganisms in an MFC Busalmen et al, 2008;Kokko et al, 2015). The cathode potential affects the treatment efficiency and intermediate products during nitrate reduction.…”

Section: Optimization Of Operational Conditionsmentioning

confidence: 99%

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Sun

Zhuang

et al. 2016

Journal of Environmental Sciences

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Section: Optimization Of Operational Conditionsmentioning

confidence: 99%

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Sun

Zhuang

et al. 2016

Journal of Environmental Sciences

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“…The performance of MECs is well known to be impacted in terms of current production for simple substrates such as acetate, although the community structure is relatively unchanged for different SAPs1. When SAPs have been examined in MFCs using fermentable substrates such as xylose, sucrose, formate, and glucose6131415, it was shown that the SAP influenced the biocatalytic activity, electrochemical performance, substrate degradation, and microbial community structure. Also, it altered the syntrophic interactions between the organisms14.…”

mentioning

confidence: 99%

Set anode potentials affect the electron fluxes and microbial community structure in propionate-fed microbial electrolysis cells

Hari

Katuri

Logan

et al. 2016

Sci Rep

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Anode potential has been shown to be a critical factor in the rate of acetate removal in microbial electrolysis cells (MECs), but studies with fermentable substrates and set potentials are lacking. Here, we examined the impact of three different set anode potentials (SAPs; −0.25, 0, and 0.25 V vs. standard hydrogen electrode) on the electrochemical performance, electron flux to various sinks, and anodic microbial community structure in two-chambered MECs fed with propionate. Electrical current (49–71%) and CH4 (22.9–41%) were the largest electron sinks regardless of the potentials tested. Among the three SAPs tested, 0 V showed the highest electron flux to electrical current (71 ± 5%) and the lowest flux to CH4 (22.9 ± 1.2%). In contrast, the SAP of −0.25 V had the lowest electron flux to current (49 ± 6%) and the highest flux to CH4 (41.1 ± 2%). The most dominant genera detected on the anode of all three SAPs based on 16S rRNA gene sequencing were Geobacter, Smithella and Syntrophobacter, but their relative abundance varied among the tested SAPs. Microbial community analysis implies that complete degradation of propionate in all the tested SAPs was facilitated by syntrophic interactions between fermenters and Geobacter at the anode and ferementers and hydrogenotrophic methanogens in suspension.

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“…The change in the Ochrobactrum intermedium K1 cell concentration is reflected in the change in OD600 (absorbance at 600 nm wavelength) [4]. The ORP (oxidation-reduction potential) directly reflects the redox ability of the environment in which micro-organisms are located and are also characterized by the metabolism of micro-organisms [37]. The changes of OD600 and ORP (redox potential) in the Stage 1-Stage 5 medium induced by electro-oil are shown in Figure 4.…”

Section: Electric-oil-induced Domesticationmentioning

confidence: 99%

“…The optimum growth temperature of Ochrobactrum intermedium is about 30 • C in a weak alkaline environment. SMFC proton consumption becomes faster and more conducive to the electrochemical activity of micro-organisms, accelerating the transfer and consumption of electrons, thus accelerating its metabolism [37,38]. Figures 5 and 6 show the experimental results of the SMFC electricity generation performance of the control group, experimental group 1, and experimental group 2.…”

Section: Analysis Of the Effect Of Strain K1 On Smfcmentioning

confidence: 99%

Effect of Electro-Oil Acclimation of an Indigenous Strain on the Performance of Sediment Microbial Fuel Cells (SMFC)

et al. 2023

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Sediment microbial fuel cell (SMFC) is a type of MFC without a proton exchange membrane. However, SMFC have had problems with low-power production performance. In this paper, the effects of native bacteria (K1) in oily sludge and their electro-oil-induced domestication on the power generation and oil removal performance of SMFC were studied. The results showed that K1 belonged to Ochrobactrum intermedium. During the domestication process, an upward trend was shown in the OD600 and ORP values in the culture medium, and it grown best at 0.7 V. Ochrobactrum intermedium K1 significantly increased the average output voltage, electromotive force, and maximum power density of SMFC and reduced the apparent internal resistance of the battery. The maximum power density was 169.43 mW/m3, which was 8.59 times higher than that of the control group. Ochrobactrum intermedium K1 improved the degradation of crude oil by SMFC. Ochrobactrum intermedium K1 enhanced the degradation of high-carbon alkanes and even-carbon alkanes in n-alkanes. Cyclic voltammetry and chronoamperometry tests showed that after acclimation, Ochrobactrum intermedium K1 improved the extracellular electron transfer efficiency (EET) mediated by c-Cyts and flavin by increasing the surface protein redox potential.

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Effects of anode potentials on bioelectrogenic conversion of xylose and microbial community compositions

Cited by 11 publications

References 25 publications

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Set anode potentials affect the electron fluxes and microbial community structure in propionate-fed microbial electrolysis cells

Effect of Electro-Oil Acclimation of an Indigenous Strain on the Performance of Sediment Microbial Fuel Cells (SMFC)

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