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The performance of a microbial fuel cell (MFC) was investigated at different temperatures and anodic media. A lag phase of 30 h occurred at 30 degrees C which was half that at room temperature (22 degrees C). The maximum power density at 30 degrees C was 70 mW/m(2) and at 22 degrees C was 43 mW/m(2). At 15 degrees C, no successful operation was observed even after several loadings for a long period of operation. Maximum power density of 320 mW/m(2) was obtained with wastewater medium containing phosphate buffer (conductivity: 11.8 mS/cm), which was approx. 4 times higher than the value without phosphate additions (2.89 mS/cm).
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http://dx.doi.org/10.1007/s10529-008-9687-4 | DOI Listing |
Bioprocess Biosyst Eng
September 2025
Department of Life Sciences, Chhatrapati Shahu Ji Maharaj University, Kanpur, 208024, India.
The development of innovative bioprocessing technologies has resulted from the growing global need for sustainable forms of energy and environmentally friendly waste treatment. In this review, we focus on the combined electro-fermentation and microbial fuel cells, as they form a hybrid system that simultaneously addresses wastewater treatment, bioenergy production, and bioplastics. Even though microbial fuel cells produce electricity out of the organic waste by the use of electroactive microorganisms, electro-fermentation improves the microbial pathways through the external electrochemical management.
View Article and Find Full Text PDFWater Res
August 2025
College of Environment and Ecology, Chongqing University, Chongqing 400045, China; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, China. Electronic address:
This study explores the role of α-Fe₂O₃ in improving extracellular electron transfer (EET) and symbiotic interactions between electroactive Shewanella oneidensis MR-1, its gene-deficient mutants (ΔmtrC, ΔomcA, and ΔcymA), and microalgae (Chlorella vulgaris). The iron oxide facilitates the efficient transfer of electrons generated by MR-1 to microalgal photosystem via the pathway of CymA-MtrC-OmcA to α-Fe₂O₃. This process enhances the removals of TOC, TN, and NH₄⁺-N in the MR-1 bacterial-algal consortium by 9.
View Article and Find Full Text PDFBiosens Bioelectron
August 2025
Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, 3200003, Haifa, Israel; The Resnick Sustainable Center for Catalysis, Technion - Israel Institute of Technology, 3200003, Haifa, Israel; Nancy and Stephen Grand Technion Energy Program, Technion - Israel Instit
Exploiting biomass as a fuel source has attracted increasing attention over the last few decades. Combined biotic-abiotic systems can enhance conversion efficiency, but biotic reactions often require oxygen-free conditions, which are hindered by oxygen evolution at the photoanode. Herein, we develop a modular microbial-photoelectrochemical cell (MPEC) that facilitates the one-pot degradation and light-induced conversion of cellulosic material into electrical power and added-value compounds.
View Article and Find Full Text PDFBioresour Technol
August 2025
Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Dublin 2, Ireland. Electronic address:
Single-chamber air-cathode microbial fuel cells (SA-MFCs) are an aeration-free, energy-positive technology for nitrogen removal, which is critical for environmental protection. However, existing studies on nitrogen removal mechanisms in SA-MFCs are conflicting, hindering further development. Focusing on removal mechanisms, this study comprehensively investigated three potential nitrogen removal pathways (ammonia volatilisation, electrochemical oxidation and biological conversion) using both conventional hand-made and 3D-printed air cathodes.
View Article and Find Full Text PDFWorld J Clin Cases
September 2025
Department of Burns and Plastic Surgery, Zhongshan City People's Hospital, Zhongshan 528400, Guangdong Province, China.
This article explores the association between salivary uric acid (UA) and periodontitis, systematically analyzing its dual roles and research progress. Studies indicate that UA acts as a primary antioxidant in saliva under physiological conditions (accounting for 70%), protecting periodontal tissues by scavenging reactive oxygen species. However, when gum disease becomes severe, UA can switch roles and fuel inflammation, worsening tissue damage.
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