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<p>Energy production in Microbial Fuel Cell can be affected by microorganisms developed during organic matter degradation in wastewater from sugar cane, such as tequila and mezcal industry. Efficiencies of energy conversion remain insufficient for large-scale implementation of this technology. <i>Geobacter sulfurreduscens</i> and <i>Shewanella oneidensis</i> have been exhaustively studied; however, there are few reports about the capabilities of mixed consortiums for the degradation of organic matter and bioelectricity production. In this study, the most abundant bacterial genera were <i>Bacteroides</i>, <i>Lactobacillus</i>, <i>Gluconobacter</i>, <i>Pseudomonas</i>, and <i>Rikenellaceae</i> in Dual Chamber-Microbial Fuel Cell, whose consortia generated a maximum voltage of 160 mV from a chemical oxygen demand of 4200&#xa0;mg/L. Furthermore, we evaluate performance by equivalent circuit modeling; results suggest that internal resistances affect performance, and high-power density is observed when ohmic resistance decreases. In addition, capacitive and ion transport elements and load transfer resistance can be influenced by the consortiums developed, which determines that the bioelectrochemical performance depends to a greater extent on the microbial community. Scanning electronic microscopy analysis showed differences in the apparent density of anodic biofilm. We found that the substrate directly affects the development of electrogenic microbial consortiums, their organic matter degradation, and bioelectricity production capacities.</p>

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Enrichment of electrogenic consortiums for the degradation of vinasses and molasses in MFC

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Mijaylova-Nacheva Petia,
  • Godoy-Lozano Elizabeth Ernestina,
  • Guadarrama-Pérez Oscar,
  • Alegría-Herrera Elian Yuritzi,
  • Estrada-Arriaga Edson Baltazar,
  • Hernández-Romano Jesús,
  • Guadarrama-Pérez Victor Hugo

摘要

Energy production in Microbial Fuel Cell can be affected by microorganisms developed during organic matter degradation in wastewater from sugar cane, such as tequila and mezcal industry. Efficiencies of energy conversion remain insufficient for large-scale implementation of this technology. Geobacter sulfurreduscens and Shewanella oneidensis have been exhaustively studied; however, there are few reports about the capabilities of mixed consortiums for the degradation of organic matter and bioelectricity production. In this study, the most abundant bacterial genera were Bacteroides, Lactobacillus, Gluconobacter, Pseudomonas, and Rikenellaceae in Dual Chamber-Microbial Fuel Cell, whose consortia generated a maximum voltage of 160 mV from a chemical oxygen demand of 4200 mg/L. Furthermore, we evaluate performance by equivalent circuit modeling; results suggest that internal resistances affect performance, and high-power density is observed when ohmic resistance decreases. In addition, capacitive and ion transport elements and load transfer resistance can be influenced by the consortiums developed, which determines that the bioelectrochemical performance depends to a greater extent on the microbial community. Scanning electronic microscopy analysis showed differences in the apparent density of anodic biofilm. We found that the substrate directly affects the development of electrogenic microbial consortiums, their organic matter degradation, and bioelectricity production capacities.