Advancing wastewater treatment: The role of photocatalytic microbial fuel cells
2024
Rahimnejad, Mostafa
The increasing reliance on fossil fuels has led to significant environmental challenges, including pollution and habitat degradation. To address these issues, microbial fuel cells (MFCs) offer a promising alternative by converting organic waste into bioelectricity while simultaneously treating wastewater. This study explores the integration of photocatalytic materials within a microbial fuel cell framework, aiming to enhance its overall performance. We employed a dual-chambered MFC with a photosynthetic cathode featuring novel photocatalytic surfaces designed to maximize light absorption and promote enhanced microbial activity. Experiments were conducted under various light exposure conditions, including continuous illumination and alternating light/dark phases, to evaluate their effects on power generation and wastewater treatment efficiency. Preliminary findings indicate a substantial increase in maximum power density—up to 30% greater than traditional MFC configurations—attributable to improved oxygen generation facilitated by the photocatalytic processes. Furthermore, the study examines the impact of integrating specific algal strains as biocomponents within the MFC architecture. Results demonstrate that the presence of these microorganisms not only optimizes energy output but also contributes to a significant reduction of chemical oxygen demand (COD) in treated effluents. The findings underscore the potential for innovative photocatalytic strategies to enhance the viability and sustainability of MFC technology, paving the way for cleaner energy solutions and effective waste management practices.
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