Enhanced bio-decolourisation of acid orange 7 by Shewanella oneidensis through co-metabolism in a microbial fuel cell

Fernando, Eustace; Keshavarz, T.; Kyazze, Godfrey

doi:10.1016/j.ibiod.2012.04.010

Cited by 86 publications

(36 citation statements)

References 28 publications

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“…This correlates with study by Scholz, 2008 which suggests that number of protons transported across Nafion is higher than CEM, thereby maintaining the pH equilibrium in Nafion system [17]. A similar system with 195 mg/L Acid Orange 7 (AO 7) as dye, Pt as catalyst and CMI 7000 as ion exchange membrane gave a Pmax value of 24 mW m -2 [29].…”

Section: Current and Power Generationsupporting

confidence: 81%

Decolourisation of Acid orange 7 in a microbial fuel cell with a laccase-based biocathode: Influence of mitigating pH changes in the cathode chamber

Mani

Keshavarz

Chandra

et al. 2017

Enzyme and Microbial Technology

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights of Research1. First Study to observe the influence of mitigating pH changes and its effect on laccase activity in a microbial fuel cell (MFC).2. Decoupling pH and salinity in the cathode chamber of MFC.3. Correlation of laccase activity with performance of the system. Results show that using Nafion 117 membrane limits salinity and pH changes in the cathode (100 mM acetate buffer as catholyte) leading to prolonged laccase activity and faster AO7 decolourisation compared to using CMI7000 as a membrane; similarly automatic pH control in the cathode chamber was found to be better than using 200 mM acetate buffer.It is suggested that while pH control in the cathode chamber is important, it does not guarantee sustained laccase activity; that salinity increases affect the activity and could be mitigated using a cation selective membrane.

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Section: Current and Power Generationsupporting

confidence: 81%

Decolourisation of Acid orange 7 in a microbial fuel cell with a laccase-based biocathode: Influence of mitigating pH changes in the cathode chamber

Mani

Keshavarz

Chandra

et al. 2017

Enzyme and Microbial Technology

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“…AO7 decolorization efficiency, sulphanilic acid (SA) formation efficiency and chemical oxygen demand (COD) removal were calculated and modeled according to (Fernando et al, 2012). Anode and cathode as well as the reference electrode were connected to a data acquisition unit (Keithley 2700, Keithley Co., Ltd., USA) with external resistance of 20 X to record electrode potential and current every 10 min.…”

Section: Analysis and Calculationmentioning

confidence: 99%

Improved azo dye decolorization in an advanced integrated system of bioelectrochemical module with surrounding electrode deployment and anaerobic sludge reactor

Kong

Wang

Ren

2015

Bioresource Technology

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h i g h l i g h t sIntegrated system with BES module and ASR was developed for azo dye treatment. It improved decolorization and electrochemical performance without co-substrate. COD can be removed after cleavage of the azo bond, different from biocathode BES. Cooperation of cathode, biofilm, and sludge played an important role in treatment. t r a c tA new integrated system, embedding a modular bioelectrochemical system (BES) with surrounding electrode deployment into an anaerobic sludge reactor (ASR), was developed to improve azo dye decolorization. Results demonstrated that the AO7 decolorization and COD removal can be improved without cosubstrate in such system. The kinetic rate of decolorization (0.54 h À1 ) in integrated system was 1.4-fold and 54.0-fold higher than that in biocathode BES (0.39 h À1 ) and ASR (0.01 h À1 ), respectively. COD can be removed after cleavage of azo bond, different from biocathode BES. The combined advantages of this integrated system were achieved by the cooperation of biocathode in modular BES and sludge in ASR. Biocathode was a predominant factor in AO7 decolorization, and anaerobic sludge contributed negligibly to AO7 reduction decolorization but mostly in the COD removal. These results demonstrated the great potential of integrating a BES module with anaerobic treatment process for azo dye treatment.

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“…Bioelectrochemical technology has recently drawn increasing attention in azo dyes treatment (Fernando et al, 2012;Hou et al, 2012;Luo et al, 2011;Mu et al, 2009;Solanki et al, 2013;Wang et al, 2013a,b). There are two modes for azo dyes decolorization in BES.…”

Section: Introductionmentioning

confidence: 99%

Accelerated decolorization of azo dye Congo red in a combined bioanode–biocathode bioelectrochemical system with modified electrodes deployment

Kong

Wang

Cheng

et al. 2014

Bioresource Technology

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h i g h l i g h t sCR decolorization was accelerated with combined bioanode-biocathode BES. The biocathode played an important role in accelerating CR decolorization. Three electrodes deployments were compared based on startup, DE and EIS analysis. The surrounding mode was the best, followed by vertical and horizontal ones. The possible mechanism for the combined bioanode-biocathode was discussed. a r t i c l e i n f o In this study, BES with bioanode and biocathode was applied to decolorize an azo dye Congo red (CR). Results showed that the Congo red decolorization efficiency (CR-DE) within 23 h in a combined bioanode-biocathode single chamber BES was 98.3 ± 1.3%, significantly higher than that of mixed solution in a dual chamber BES (67.2 ± 3.5%) (P < 0.005). Various electrodes deployments (horizontal, vertical and surrounding) in the combined bioanode-biocathode BES were further compared based on the decolorization performance and electrochemical characterization. Results indicated that CR-DE within 11 h improved from 87.4 ± 1.3% to 97.5 ± 2.3%, meanwhile the internal resistance decreased from 236.6 to 42.2 X as modifying the horizontal deployment to be a surrounding deployment. It proved that the combination of bioanode and biocathode with suitable electrodes deployment could accelerate the decolorization of azo dye Congo red, which would be great potential for the application of bioelectrochemical technology in azo dye wastewater treatment.

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Enhanced bio-decolourisation of acid orange 7 by Shewanella oneidensis through co-metabolism in a microbial fuel cell

Cited by 86 publications

References 28 publications

Decolourisation of Acid orange 7 in a microbial fuel cell with a laccase-based biocathode: Influence of mitigating pH changes in the cathode chamber

Decolourisation of Acid orange 7 in a microbial fuel cell with a laccase-based biocathode: Influence of mitigating pH changes in the cathode chamber

Improved azo dye decolorization in an advanced integrated system of bioelectrochemical module with surrounding electrode deployment and anaerobic sludge reactor

Accelerated decolorization of azo dye Congo red in a combined bioanode–biocathode bioelectrochemical system with modified electrodes deployment

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