A comparative study on the performance of microbial fuel cell for the treatment of reactive orange 16 dye using mixed and pure bacterial species and its optimization using response surface methodology

Shahi, Amrita; Chellam, Padmanaban Velayudhaperumal; Verma, Ankur; Singh, Ravi Shankar

doi:10.1016/j.seta.2021.101667

Cited by 13 publications

(5 citation statements)

References 80 publications

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“…Acinetobacter is a Gram-negative bacterium, which is widely found in soil, fresh water and other natural environments. It was the dominant genus of MFC anode electrogens [ 42 ]. In addition, the abundance of Geobacter was also considerably enhanced, it achieved 13.00%, 17.08% and 13.75% on CF, WGCM and nano-TiO 2 /WGCM, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, Acinetobacter was dominant in the anode microbial community of MFCs constructed with fruit waste residue as the substrate [ 47 ] and anaerobic fluidized bed MFCs constructed with industrial wastewater [ 48 ]. The study on the degradation of dye wastewater by MFCs showed that the electricity production of MFCs inoculated with Acinetobacter pitii was even better than that of MFCs inoculated with mixed bacteria [ 42 ].…”

Section: Resultsmentioning

confidence: 99%

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Three-Dimensional Carbon Monolith Coated by Nano-TiO2 for Anode Enhancement in Microbial Fuel Cells

Zhao

Chen

Zhang

et al. 2023

IJERPH

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A three-dimensional (3D) anode is essential for high-performance microbial fuel cells (MFCs). In this study, 3D porous carbon monoliths from a wax gourd (WGCM) were obtained by freeze-drying and carbonization. Nano-TiO2 was further coated onto the surface of WGCM to obtain a nano-TiO2/WGCM anode. The WGCM anode enhanced the maximum power density of MFCs by 167.9% compared with the carbon felt anode, while nano-TiO2/WGCM anode additionally increased the value by 45.8% to achieve 1396.2 mW/m2. WGCM enhancement was due to the 3D porous structure, the good conductivity and the surface hydrophilicity, which enhanced electroactive biofilm formation and anodic electron transfer. In addition, nano-TiO2 modification enhanced the enrichment of Acinetobacter, an electricigen, by 31.0% on the anode to further improve the power production. The results demonstrated that the nano-TiO2/WGCM was an effective anode for power enhancement in MFCs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Three-Dimensional Carbon Monolith Coated by Nano-TiO2 for Anode Enhancement in Microbial Fuel Cells

Zhao

Chen

Zhang

et al. 2023

IJERPH

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“…RSM can be used to generate the best experimental design or operating conditions. It has been widely used to optimize the operating parameters of reactors and to examine the interaction among independent variables 24 . A composite biochar cathode comprises biochar, conductive carbon black and polyvinyl alcohol (PVA) (binder), and these three components are the independent variables (factors) that are the amounts of each in the cathode.…”

Section: Methodsmentioning

confidence: 99%

Cathodes for microbial fuel cells that improve the removal of copper ions from wastewater concomitant with power generation using the response surface methodology

Liu

Zhu

Lin

2022

Intl J of Energy Research

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Microbial fuel cells (MFCs) have the potential to remove copper ions from wastewater, but the high cost of their cathode materials and their limited effectiveness in removing copper ions have limited their commercialization. In this study, a composite cathode was developed using response surface methodology (RSM); peanut shells were used to produce biochar, which was compounded with conductive carbon black (CCB). When 83% of the cathode material was biochar, its resistance was low and its copper adsorption capacity was high. An MFC with such a composite cathode removed 95% of copper from wastewater within 5 days, which is 1.52 times more than that removed using a CCB cathode MFC. Although the power production capacity of the composite cathode MFC was slightly lower than that of the CCB cathode MFC, the composite cathode achieved 56% of the power output of the CCB cathode MFC using only 17% of the CCB, significantly reducing the cost of cathode production. The optimized composite biochar cathode that was developed using RSM provides both low resistance and a high copper adsorption capacity, and can be used in MFCs to improve their removal of copper ions from wastewater. This investigation also demonstrates the potential of agricultural waste as an electrode material in MFCs, reducing their production cost and improving their performance.

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“…A broad absorption peak is observed around 3460 cm −1 , representing the stretching vibrations of O-H and N-H [31,32]; two absorption peaks at 2336 cm −1 and 2362 cm −1 correspond to characteristic absorption peaks of CO 2 . The absorption peak at 1650 cm −1 corresponds to the -N=N-structure of azo dyes [33,34]. A series of sharp absorption peaks in the range of 1650 cm −1 to 1539 cm −1 represent skeletal vibrations of benzene rings, naphthalene rings, triazine structures, as well as stretching vibrations of functional groups such as C=N, C=C, and N=O [33,35].…”

Section: Intermediates and Degradation Pathwaysmentioning

confidence: 99%

In Situ Utilization of Electron-Enhanced Degradation of Azo Dyes in a Constructed Wetland–Microbial Fuel Cell Coupling System

Xie,

Hu,

Cao

et al. 2024

Sustainability

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In this study, a constructed wetland was coupled with a microbial fuel cell to establish a coupled system known as the constructed wetland–microbial fuel cell (CW–MFC), utilized for the treatment of X-3B azo dye wastewater at varying concentrations. Experimental results indicated that the anodic region made the primary contributions to the discoloration of azo dyes and COD removal, with a contribution rate of 60.9–75.8% for COD removal and 57.8–83.0% for the effectiveness of discoloration. Additionally, the role of plants in the constructed wetland area could achieve the removal of small molecular substances and further discoloration. In comparison to open-circuit conditions, under closed-circuit conditions the CW–MFC effectively degraded X-3B azo dye wastewater. Under an external resistance of 2000 Ω, a maximum COD removal rate of 60.0% and a maximum discoloration rate of 85.8% were achieved for X-3B azo dye at a concentration of 100 mg/L. Improvements in the treatment efficiency of X-3B dye wastewater were achieved by altering the external resistance. Under an external resistance of 100 Ω and an influent concentration of X-3B of 800 mg/L, the COD removal rate reached 78.6%, and the decolorization rate reached 85.2%. At this point, the CW–MFC exhibited a maximum power density of 0.024 W/m3 and an internal resistance of 99.5 Ω. Spectral analysis and GC–MS results demonstrated the effective degradation of azo dyes within the system, indicating azo bond cleavage and the generation of numerous small molecular substances. Microbial analysis revealed the enrichment of electrogenic microorganisms under low external resistance conditions, where Geobacter and Trichococcus were dominant bacterial genera under an external resistance of 100 Ω, playing crucial roles in power generation and azo dye degradation within the system.

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A comparative study on the performance of microbial fuel cell for the treatment of reactive orange 16 dye using mixed and pure bacterial species and its optimization using response surface methodology

Cited by 13 publications

References 80 publications

Three-Dimensional Carbon Monolith Coated by Nano-TiO2 for Anode Enhancement in Microbial Fuel Cells

Three-Dimensional Carbon Monolith Coated by Nano-TiO2 for Anode Enhancement in Microbial Fuel Cells

Cathodes for microbial fuel cells that improve the removal of copper ions from wastewater concomitant with power generation using the response surface methodology

In Situ Utilization of Electron-Enhanced Degradation of Azo Dyes in a Constructed Wetland–Microbial Fuel Cell Coupling System

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