Wu Wenguo, Lesnik Keaton Larson, Xu Shoutao, Wang Luguang, Liu Hong
Microb Cell Fact. 2014 Jul 4;13:91. doi: 10.1186/s12934-014-0091-6.
The release of antibiotics into aquatic environments has made the treatment of wastewater containing antibiotics a world-wide public health problem. The ability of microbial fuel cells (MFCs) to harvest electricity from organic waste and renewable biomass is attracting increased interest in wastewater treatment. In this paper we investigated the bioelectrochemical response of an electroactive mixed-culture biofilm in MFC to different tobramycin concentrations.
The electroactive biofilms showed a high degree of robustness against tobramycin at the level of μg/L. The current generation responses of the biofilms were affected by the presence of tobramycin. The inhibition ratio of the MFC increased exponentially with the tobramycin concentrations in the range of 0.1-1.9 g/L. The bacterial communities of the biofilms vary with the concentrations of tobramycin, the equilibrium of which is critical for the stability of electroactive biofilms based-MFC.
Experimental results demonstrate that the electroactive biofilm-based MFC is robust against antibiotics at the level of μg/L, but sensitive to changes in antibiotic concentration at the level of g/L. These results could provide significant information about the effects of antibiotics on the performance MFC as a waste-treatment technology.
抗生素排放到水生环境中已使含抗生素废水的处理成为一个全球性的公共卫生问题。微生物燃料电池（MFC）从有机废物和可再生生物质中获取电能的能力，正吸引着人们对废水处理的兴趣日益增加。在本文中，我们研究了MFC中电活性混合培养生物膜对不同妥布霉素浓度的生物电化学响应。
电活性生物膜在微克/升水平对妥布霉素表现出高度的耐受性。生物膜的电流产生响应受到妥布霉素存在的影响。在0.1 - 1.9克/升范围内，MFC的抑制率随妥布霉素浓度呈指数增加。生物膜的细菌群落随妥布霉素浓度而变化，其平衡对于基于电活性生物膜的MFC的稳定性至关重要。
实验结果表明，基于电活性生物膜的MFC在微克/升水平对抗生素具有耐受性，但在克/升水平对抗生素浓度变化敏感。这些结果可为抗生素对作为废物处理技术的MFC性能的影响提供重要信息。
