Complete degradation of the azo dye Acid Orange-7 and bioelectricity generation in an integrated microbial fuel cell, aerobic two-stage bioreactor system in continuous flow mode at ambient temperature

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

doi:10.1016/j.biortech.2014.01.036

Cited by 101 publications

(35 citation statements)

References 26 publications

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“…Notably this observation was further corroborated by corresponding decrease in COD removal temporarily. As the ambient temperature increases, due to change of seasons and microbial adaptation, a steady recovery in power outputs was observed which corresponded with a slight increase in COD removal efficiency (Li et al, 2013;Fernando et al, 2014). These observations corroborated well with the results of numerous other studies that reported increase in COD removal efficiencies at higher HRT regimes (Kuscu and Sponza, 2009;Akman et al, 2013;Li et al, 2013) and this can be attributed to the decrease in organic loading rate (OLR) with increasing HRT.…”

Section: Resultssupporting

confidence: 88%

“…Most of the previous studies reported in the literature have focused on effect of high organic loading or shock load on bioreactors (including MFCs) at different operating conditions (Fernando et al, 2014;Senturk et al, 2012;Karim and Gupta, 2006;Jayashree et al, 2014). However, at very low COD/pollutant levels, substrate concentration can become a rate limiting factor to microbial degradation.…”

Section: Effect Of Oligotrophic and Copiotrophic Conditions On Mfc Opmentioning

confidence: 99%

“…It is likely possible that the biofilms formed on the anode adapted itself to this harsh condition by allowing the microbial cells at the outer surface to switch off or become dormant (in order to preserve itself) while protecting the microbial colony present within the inner part of the biofilm (Juana et al, 1998;Fernando et al, 2014;Akman et al, 2013). This speculation was further supported by fast recovery in overall MFC performance as the MFC was switched to copiotrophic conditions.…”

Section: Effect Of Oligotrophic and Copiotrophic Conditions On Mfc Opmentioning

confidence: 99%

“…COD removal, 64 % and power density, 5.78 mWm -2 ) was obtained in the tubular MFC at HRT of 30 h. This clearly indicates that the MFC reactor had the ability to resist organic shock loading and maintain a stable performance under these test conditions; hence indicating the robustness of the reactor system. It has been reported that MFC may maintain its performance (in terms of COD removal) without any process inhibition (Fernando et al, 2014;Kraume et al, 2009). …”

Section: Performance Under Copiotrophic (Substrate) Conditionsmentioning

confidence: 99%

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Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Adelaja

Keshavarz

Kyazze

2017

International Biodeterioration & Biodegradation

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Bioelectrochemical systems could have potential for bioremediation of contaminants either in situ or ex situ. The treatment of a mixture of phenanthrene and benzene using two different tubular microbial fuel cells (MFCs) designed for either in situ and ex situ applications in aqueous systems was investigated over long operational periods (up to 155 days). For in situ deployments, simultaneous removal of the petroleum hydrocarbons (>90% in term of degradation efficiency) and bromate, used as catholyte, (up to 79 %) with concomitant biogenic electricity generation (peak power density up to 6.75 mWm -2 ) were obtained at a hydraulic retention time (HRT) of 10 days. The tubular MFC could be operated successfully at copiotrophic (100 ppm phenanthrene, 2000 ppm benzene at HRT 30 days) and oligotrophic (phenanthrene and benzene, 50 ppb each, HRT 10 days) substrate conditions suggesting its effectiveness and robustness at extreme substrate concentrations in anoxic environments. In the MFC designed for ex situ deployments, optimum MFC performance was obtained at HRT of 30 h giving COD removal and maximum power output of approximately 77% and 6.75 mWm -2 respectively. The MFC exhibited the ability to resist organic shock loadings and could maintain stable MFC performance. Results of this study suggest the potential use of MFC technology for possible in situ/ex situ hydrocarbon-contaminated groundwater treatment or refinery effluents clean-up, even at extreme contaminant level conditions.

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Section: Resultssupporting

confidence: 88%

Section: Effect Of Oligotrophic and Copiotrophic Conditions On Mfc Opmentioning

confidence: 99%

Section: Effect Of Oligotrophic and Copiotrophic Conditions On Mfc Opmentioning

confidence: 99%

Section: Performance Under Copiotrophic (Substrate) Conditionsmentioning

confidence: 99%

See 2 more Smart Citations

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Adelaja

Keshavarz

Kyazze

2017

International Biodeterioration & Biodegradation

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“…The energy recuperation from 0.6 mM AO7 aqueous solutions, by means of a microbial fuel cell coupled with an aerobic system while the textile effluent was been treated, was as well documented [12]. …”

Section: Introductionmentioning

confidence: 99%

Prediction of the Indirect Advanced Oxidation of Acid Orange 7 using a 3D RVC Cathode for H2O2 Production in a Divided Electrochemical Reactor

Díaz-Flores¹,

Morelos²

2018

Int. J. Green Technol.

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A three dimensional reticulate vitreous carbon piece is used to design an electrode for the cathodic O2 reduction reaction in a divided (by a Nafion 117 membrane) parallel plate reactor. The anode is a commercial stainless steel mesh. This approach allows producing H2O2 at low energy (6.85 kWKg -1 H2O2) in a low ionic acidic medium (0.05M Na2SO4, pH 2). Under these conditions the H2O2 can be activated, in the presence of 1 mM Fe 2+ , as soon as it is produced to develop the Fenton Reagent. It is found that Acid Orange 7 indirect oxidation (in the concentration range of 0.07 to 0.19 mM) by Fenton process follows a first order kinetic equation. From each experimental AO7 oxidation the main parameters (a,mM and k,min 1 ) of the first order kinetic equation are obtained. These parameters can be correlated with AO7 concentration in the concentration range studied. A semi-empirical chemical model to predict AO7 degradation, in the electrochemical reactor, can be developed taking into account the main equations derived from experimental data. The prediction of the main parameters (H2O2 electro-produced, oxidation rate, energy required, electrolysis time) shows good agreement with the experimental data. Therefore, it was found that 1.83 kWhm -3 are needed to oxidize 0.191 mM AO7 in 3h. The chemical model can be used to predict both time and the energy required to treat a textile effluent with a variable pollutant organic load.

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Advanced Biowaste‐Based Flexible Photocatalytic Fuel Cell as a Green Wearable Power Generator

Lui

Jiang

Lenos

et al. 2016

Adv Materials Technologies

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This study designs a wearable power generator from a flexible, photocatalytic fuel cell (fPFC) using various biowaste sources (lactic acid, ethanol, methanol, urea, glycerol, and glucose) as fuel. The fPFC uses light irradiation and the decomposition of biowaste to generate electrical power under both flat and bending (r = 3 cm) conditions. When employed as a sweat band, the fPFC generates a maximum power 4.0 mW cm−2 g−1 from human sweat. The wearable fPFC is able to overcome many of the disadvantages of wearable microbial and enzymatic cells while providing comparable if not superior power density.

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Complete degradation of the azo dye Acid Orange-7 and bioelectricity generation in an integrated microbial fuel cell, aerobic two-stage bioreactor system in continuous flow mode at ambient temperature

Cited by 101 publications

References 26 publications

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications

Prediction of the Indirect Advanced Oxidation of Acid Orange 7 using a 3D RVC Cathode for H2O2 Production in a Divided Electrochemical Reactor

Advanced Biowaste‐Based Flexible Photocatalytic Fuel Cell as a Green Wearable Power Generator

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