A critical revisit of the key parameters used to describe microbial electrochemical systems

Sharma, Mohita; Bajracharya, Suman; Gildemyn, Sylvia; Patil, Sunil A.; Álvarez-Gallego, Yolanda; Pant, Deepak; Rabaey, Korneel; Domínguez-Benetton, Xochitl

doi:10.1016/j.electacta.2014.02.111

Cited by 143 publications

(64 citation statements)

References 157 publications

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“…This clearly showed that increasing the specific electrode surface area by 40 000 % (brush electrode) and 55 000 % (felt electrode) in comparison to the rod electrode reduced the current in the case of the brush electrode and only increased the current by a factor of 2.5. Current densities (j) were determined with regard to the projected surface area since this is the most frequently used reference [38]. The highest current density was obtained with the rod electrode This limitation was not caused by the availability of K 3 Fe(CN) 6 since the K 3 Fe(CN) 6 concentration did not decrease below 2 mM with all electrodes during the processes.…”

Section: Working Electrodes For Mediated Anodic Respirationmentioning

confidence: 99%

Anodic respiration of Pseudomonas putida KT2440 in a stirred-tank bioreactor

Hintermayer

Krömer

et al. 2016

Biochemical Engineering Journal

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Section: Working Electrodes For Mediated Anodic Respirationmentioning

confidence: 99%

Anodic respiration of Pseudomonas putida KT2440 in a stirred-tank bioreactor

Hintermayer

Krömer

et al. 2016

Biochemical Engineering Journal

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“…The absolute current of |I acetate | was higher than | I glucose |, suggested that the cathodic biofilm was more active fed with acetate than glucose, although the high decolorization efficiency was shown up under glucose-fed conditions. Robustness of the electrochemically-active biofilms were a central performance indicator to prospect industrially-relevant BES that use microorganisms as the electrocatalytic entity (Sharma et al, 2014). Impedance response of the whole cell, anode and cathode in dual-chamber BES were analyzed, as shown by Nyquist plots (Fig.…”

Section: Electrochemical Properties Of Glucose/acetate-fed Biocathodementioning

confidence: 99%

Cathodic bacterial community structure applying the different co-substrates for reductive decolorization of Alizarin Yellow R

Sun

Wang

et al. 2016

Bioresource Technology

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h i g h l i g h t sFeeding with glucose obtained higher AYR decolorization efficiency than acetate. Diverse cathodic bacterial communities were observed with different co-substrates. Glucose-fed condition was dominated with Citrobacter, Enterococcus and Alkaliflexus. Acetate-fed condition was dominated with Acinetobacter and Achromobacter. Co-substrate types impacted performance and the cathodic bacterial communities. a r t i c l e i n f o t r a c tSelective enrichment of cathodic bacterial community was investigated during reductive decolorization of AYR fedding with glucose or acetate as co-substrates in biocathode. A clear distinction of phylotype structures were observed between glucose-fed and acetate-fed biocathodes. In glucose-fed biocathode, Citrobacter (29.2%), Enterococcus (14.7%) and Alkaliflexus (9.2%) were predominant, and while, in acetate-fed biocathode, Acinetobacter (17.8%) and Achromobacter (6.4%) were dominant. Some electroactive or reductive decolorization genera, like Pseudomonas, Delftia and Dechloromonas were commonly enriched. Both of the higher AYR decolorization rate (k AYR = 0.46) and p-phenylenediamine (PPD) generation rate (k PPD = 0.38) were obtained fed with glucose than acetate (k AYR = 0.18; k PPD = 0.16). The electrochemical behavior analysis represented a total resistance in glucose-fed condition was about 73.2% lower than acetate-fed condition. The different co-substrate types, resulted in alteration of structure, richness and composition of bacterial communities, which significantly impacted the performances and electrochemical behaviors during reductive decolorization of azo dyes in biocathode.

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“…A more detailed analysis conducted on the change in molecular structure during the thermal conversion of biomass showed distinct phase changes in the amorphous biomass to more ordered turbostractic char and an increase in BET´N 2 surface area with increased temperature (>600˝C) [22]. Further studies on electrochemically active surface area based on normalized current per porous surface area may offer new insights on material optimization [23].…”

Section: Physical and Chemical Characterization Of Bc Electrode Matermentioning

confidence: 99%

Biochar Based Microbial Fuel Cell for Enhanced Wastewater Treatment and Nutrient Recovery

et al. 2016

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Waste-wood derived biochar was evaluated for the first time as both an anode and cathode material, simultaneously, in an overflow style microbial fuel cell (MFC) using actual industrial wastewater. Results show that the average chemical oxygen demand (COD) removal was 95% with a reduction rate of 0.53 kg¨COD¨m´1¨d´1 in closed operation mode. The ammonia and phosphorous reductions from wastewater was 73% and 88%, respectively. Stable power production was observed with a peak power density measured at 6 W/m 3 . Preliminary contributions of physical, biological, and electrochemical COD removals were evaluated, and the results show such combined mechanisms give BC an advantage for MFC applications. Nutrient recovery data showed high levels of macronutrients adsorbed onto the spent biochar electrodes, and phosphorus concentration increased from 0.16 g¨kg´1 in raw BC to up to 1.9 g¨kg´1 in the cathode. These findings highlight the use of biochar as electrodes in MFCs to facilitate simultaneous wastewater treatment and power production with additional agronomic benefits.

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A critical revisit of the key parameters used to describe microbial electrochemical systems

Cited by 143 publications

References 157 publications

Anodic respiration of Pseudomonas putida KT2440 in a stirred-tank bioreactor

Anodic respiration of Pseudomonas putida KT2440 in a stirred-tank bioreactor

Cathodic bacterial community structure applying the different co-substrates for reductive decolorization of Alizarin Yellow R

Biochar Based Microbial Fuel Cell for Enhanced Wastewater Treatment and Nutrient Recovery

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