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- MakaleAçık Erişim2026Scopus SJRQ4Designing Microbial Fuel Cells (MFCs) Including Geothrix fermentans and Gluconobacter oxydans Bacteria: Invistegation with Numerical Analysis
Monajjemi, Majid; Mollaamin, Fatemeh; Mohammadi, Samira; Shahverdy, Yasamin; Rahpayma, Mersedeh
In this work, we exhibited the effect of temperature and also cell dimensions on the microbial fuel cells (MFCs) efficiency according to our experimental data. In other words, microbial fuel cells (MFCs) are emerging as promising technologies for applications such as electricity generation. Electroactive (EA) biofilms formed by microorganisms play a central role in bioelectrochemical systems through microbially mediated electrocatalytic reactions. In this study, industrial wastewater containing Geothrix fermentans and Gluconobacter oxydans was evaluated for power generation in MFCs. The effects of temperature, reactor configuration, chamber dimensions, and the distance between anodic and cathodic electrodes on electrical output were systematically investigated. Statistical analyses, including descriptive statistics, correlation, and regression, were performed using SPSS to predict average voltage from the derived regression model. A two-dimensional model was further employed to analyze ionic transport, the distribution of electronic current density, and local reaction rates in both anodic and cathodic chambers. Two types of bacteria were examined: the anaerobic Geothrix fermentans, known for its ability to utilize Fe(III) and other high-potential metals as electron acceptors, and the aerobic Gluconobacter oxydans, tested in a miniature MFC (mini-MFC) system. The results indicated that the aerobic mini-MFC achieved a lower maximum power output than the anaerobic system. Additionally, numerical fitting was performed for MFCs operating under varying temperatures and chamber dimensions. The numerical results showed strong agreement with experimental data, confirming the validity of the proposed model.
- MakaleYayıncıda açık erişim2026Scopus SJRQ3Experimental Study and Numerical Calculations to Increase the Electricity Generation of Microbial Fuel Cells (MFCs): A Comparison for Creating Voltages using Various Bacteria from Waste Materials
Monajjemi, Majid; Mollaamin, Fatemeh; Rahpayma, Mersedeh.; Fakhraian, Elnaz
MFC is a significant devices that enable the generation of electricity through anaerobic fermentation of waste materials using microbes as bio-catalysts. Since this work focuses on the electricity production of microbial fuel cells (MFCs) of various bacteria from waste materials, we studied the efficiency of industrial waste materials and soil composition containing several bacteria, including E. coli, Shewanella putrefaciens, Geobacter sulfurreducens, and Lactobacillus, that are able to create large amounts of suitable electrical power through the MFC. We followed two main approaches in this work: first, testing the efficiency of MFCs, such as the percentage of organic matter in each sample; and second, evaluating the electrical capacity of MFCs due to thermal limits. To study the process performance, the effects of temperature, structures, dimensions, and the distance between the cathodic and anodic chambers on the electrical power were investigated, and the amperage and voltage outputs from electrochemical and microbial cells were recorded. Additionally, in this work, we modeled a steady state using mathematical simulation based on mass, charge, and energy balances for MFCs. The data obtained from the numerical calculation matched our experimental results exactly. Finally, in contrast to most MFC work, which has long-term targets for renewable energy from wastewater, this study can be used immediately in practice. This work also confirms that the electricity production of MFCs can be increased by selecting appropriate conditions for sample type, temperature, and chamber size.
- DergiLetters in Applied NanoBioScience
- DergiBiointerface Research in Applied Chemistry
