Functionalised graphite felt anodes for enhanced power generation in membrane-less soil microbial fuel cells

Dhillon, Simran Kaur; Dziegielowski, Jakub; Kundu, Patit Paban; Lorenzo, Mirella Di

doi:10.1039/d2su00079b

Cited by 3 publications

(2 citation statements)

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“…It was found that graphite foam produced enhanced power density and cell biomass compared with the other types of anode materials [ 28 ]. Table S1 presents the cost of different 2D and 3D carbonaceous anode materials for MFCs [ 29 ].…”

Section: Architectural Design For Mfc Constructionmentioning

confidence: 99%

Microbial Fuel Cell Construction Features and Application for Sustainable Wastewater Treatment

et al. 2023

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A microbial fuel cell (MFC) is a system that can generate electricity by harnessing microorganisms’ metabolic activity. MFCs can be used in wastewater treatment plants since they can convert the organic matter in wastewater into electricity while also removing pollutants. The microorganisms in the anode electrode oxidize the organic matter, breaking down pollutants and generating electrons that flow through an electrical circuit to the cathode compartment. This process also generates clean water as a byproduct, which can be reused or released back into the environment. MFCs offer a more energy-efficient alternative to traditional wastewater treatment plants, as they can generate electricity from the organic matter in wastewater, offsetting the energy needs of the treatment plants. The energy requirements of conventional wastewater treatment plants can add to the overall cost of the treatment process and contribute to greenhouse gas emissions. MFCs in wastewater treatment plants can increase sustainability in wastewater treatment processes by increasing energy efficiency and reducing operational cost and greenhouse gas emissions. However, the build-up to the commercial-scale still needs a lot of study, as MFC research is still in its early stages. This study thoroughly describes the principles underlying MFCs, including their fundamental structure and types, construction materials and membrane, working mechanism, and significant process elements influencing their effectiveness in the workplace. The application of this technology in sustainable wastewater treatment, as well as the challenges involved in its widespread adoption, are discussed in this study.

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Section: Architectural Design For Mfc Constructionmentioning

confidence: 99%

Microbial Fuel Cell Construction Features and Application for Sustainable Wastewater Treatment

et al. 2023

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“…Aerobic and anaerobic soil microbial fuel cells (SMFCs) have been constructed with single and multiple chambers, optimizing electricity generation and microbial activity. For instance, different types of graphite felt electrodes have been tested as the anode in an air-cathode and membrane-less SMFC [9]. Researchers combined a composite anode material with a conductive polymer and a transition metal oxide to enhance biofilm formation and electrogenesis.…”

Section: Introductionmentioning

confidence: 99%

Detection and Characterization of Electrogenic Bacteria from Soils

Rumora,

Hopkins,

Yim

et al. 2023

BioTech

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Soil microbial fuel cells (SMFCs) are bioelectrical devices powered by the oxidation of organic and inorganic compounds due to microbial activity. Seven soils were randomly selected from Bergen Community College or areas nearby, located in the state of New Jersey, USA, were used to screen for the presence of electrogenic bacteria. SMFCs were incubated at 35–37 °C. Electricity generation and electrogenic bacteria were determined using an application developed for cellular phones. Of the seven samples, five generated electricity and enriched electrogenic bacteria. Average electrical output for the seven SMFCs was 155 microwatts with the start-up time ranging from 1 to 11 days. The highest output and electrogenic bacterial numbers were found with SMFC-B1 with 143 microwatts and 2.99 × 109 electrogenic bacteria after 15 days. Optimal electrical output and electrogenic bacterial numbers ranged from 1 to 21 days. Microbial DNA was extracted from the top and bottom of the anode of SMFC-B1 using the ZR Soil Microbe DNA MiniPrep Protocol followed by PCR amplification of 16S rRNA V3-V4 region. Next-generation sequencing of 16S rRNA genes generated an average of 58 k sequences. BLAST analysis of the anode bacterial community in SMFC-B1 demonstrated that the predominant bacterial phylum was Bacillota of the class Clostridia (50%). However, bacteria belonging to the phylum Pseudomonadota (15%) such as Magnetospirillum sp. and Methylocaldum gracile were also part of the predominant electrogenic bacterial community in the anode. Unidentified uncultured bacteria accounted for 35% of the predominant bacterial community. Bioelectrical devices such as MFCs provide sustainable and clean alternatives to future applications for electricity generation, waste treatment, and biosensors.

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Coupling Electro-Fenton and Electrocoagulation of Aluminum–Air Batteries for Enhanced Tetracycline Degradation: Improving Hydrogen Peroxide and Power Generation

Zhou,

Wei,

et al. 2024

Molecules

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Electro-Fenton (EF) technology has shown great potential in environmental remediation. However, developing efficient heterogeneous EF catalysts and understanding the relevant reaction mechanisms for pollutant degradation remain challenging. We propose a new system that combines aluminum–air battery electrocoagulation (EC) with EF. The system utilizes dual electron reduction of O2 to generate H2O2 in situ on the air cathodes of aluminum–air batteries and the formation of primary cells to produce electricity. Tetracycline (TC) is degraded by ·OH produced by the Fenton reaction. Under optimal conditions, the system exhibits excellent TC degradation efficiency and higher H2O2 production. The TC removal rate by the reaction system using a graphite cathode reached nearly 100% within 4 h, whereas the H2O2 yield reached 127.07 mg/L within 24 h. The experimental results show that the novel EF and EC composite system of aluminum–air batteries, through the electroflocculation mechanism and ·OH and EF reactions, with EC as the main factor, generates multiple •OH radicals that interact to efficiently remove TC. This work provides novel and important insights into EF technology, as well as new strategies for TC removal.

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Functionalised graphite felt anodes for enhanced power generation in membrane-less soil microbial fuel cells

Abstract: There is a global need for sustainable and clean technologies that can actively contribute to reach the net-zero carbon goal by 2050. Soil microbial fuel cell (SMFC) technology has a...

Cited by 3 publications

References 82 publications

Microbial Fuel Cell Construction Features and Application for Sustainable Wastewater Treatment

Microbial Fuel Cell Construction Features and Application for Sustainable Wastewater Treatment

Detection and Characterization of Electrogenic Bacteria from Soils

Coupling Electro-Fenton and Electrocoagulation of Aluminum–Air Batteries for Enhanced Tetracycline Degradation: Improving Hydrogen Peroxide and Power Generation

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