Abstract
The effects of different oxytetracycline (OTC) acclimation strategies on the electricity generation performance of microbial fuel cells (MFCs), the microbial community composition, and functional groups of biofilms were investigated by using low-dose stepwise acclimation (L-MFC) and high-dose direct acclimation (H-MFC). The results showed that H-MFC could effectively shorten the acclimation period by 10 days while achieving 94.93% OTC removal efficiency, which was 1.31% higher than that of L-MFC. Based on a higher response current and lower internal resistance, the maximum power output of the L-MFC (690.28 mV) was better than that of the H-MFC (670.26 mV). High-throughput sequencing results showed that the species diversity and richness of the bioanode in L-MFC were higher, and the main dominant groups were Geobacter (26.48%), Aquamicrobium (10.31%), and other electroactive microorganisms involved in extracellular electron transfer, while Cupriavidus (21.46%), Rhodopseudomonas (10.38%), Acidovorax (7.62%), and other OTC degradation groups were further enriched in H-MFC. The KEGG manifested that the biological process was mainly controlled by genes of the metabolism pathway. Among them, except for the up-regulation of xenobiotics biometabolism and metabolism functional genes in H-MFC by 0.46%, the other metabolism-related genes were highly expressed in L-MFC. Different OTC acclimation strategies have an effect on the electricity generation, microbial structure, and function of MFCs.
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The authors declare that the data supporting the findings of this study are available within the paper and its Supplementary Information files.
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Funding
This work was supported by the Key Scientific Research Project of Colleges and Universities of Henan Province (22A610011), the Special Fund for High-level Talents of Sanmenxia Polytechnic (SZYGCCRC-2021–004), and the Key Research Project of Sanmenxia City (2022002097).
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Zhang, J., Wang, X., Huang, B. et al. Effects of Different Oxytetracycline Acclimation Strategies on Microbial Community Composition and Functional Characteristics of MFC. Water Air Soil Pollut 234, 603 (2023). https://doi.org/10.1007/s11270-023-06619-8
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DOI: https://doi.org/10.1007/s11270-023-06619-8