Oily sludge is a major problem affecting the quality of oil fields and surrounding environment. Microbial fuel cell (MFC) technology is a simple way to treat the oily sludge while generating electricity. To investigate the electrochemical properties of such MFC and the characteristics of bacteria attached to anode, a single‐chamber MFC supplemented with oily sludge was constructed. The electrochemical results showed that the oily sludge is suitable for MFC operation, with a maximum output voltage of 299.13 mV and a maximum output power (P_max) of 2,255.52 mW/m². The cyclic voltammetry curve of MFC anode displayed an “S” shape, whereas the main peaks were at 0 and 0.1 V, indicating a strong redox reaction on the anode carbon felt. The limiting current was 0.08 A/cm². The scanning electron microscopy (SEM) of the bacteria on the anode surface showed that most of bacteria displayed a rod‐shaped morphology, whereas the biological metagenomic classification sequencing showed that the predominant electricity‐producing bacteria were Proteiniciclasticum (15.83%) from Firmicutes and Pseudomonas (11.9%) from Gammaproteobacteria. MFC can effectively utilize the oily sludge to generate electricity at the same time, which provides a theoretical basis for the research of MFCs' pollution control and electricity production.

中文翻译：

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含油污泥的微生物燃料电池的发电和细菌群落

油泥是影响油田和周围环境质量的主要问题。微生物燃料电池（MFC）技术是在发电时处理油性污泥的简单方法。为了研究此类MFC的电化学特性以及附着在阳极上的细菌的特性，构建了一个带有油性污泥的单室MFC。电化学结果表明，该油泥适合于MFC操作，最大输出电压为299.13 mV，最大输出功率（P _max）为2255.52 mW / m ²。MFC阳极的循环伏安曲线显示为“ S”形，而主要峰位于0和0.1 V，表明在阳极碳毡上发生了强烈的氧化还原反应。极限电流为0.08 A / cm²。阳极表面细菌的扫描电子显微镜（SEM）显示，大多数细菌呈棒状形态，而生物宏基因组分类测序表明，主要的产电细菌是Firmicutes和Pseudomonas的Proteiniciclasticum（15.83％）。（11.9％）来自伽玛变形杆菌。MFC可以有效地利用含油污泥同时发电，为MFCs的污染控制和发电提供了理论依据。