Rapid industrialization and population growth have generated a worldwide interest in renewable energy resourcesto meet. In this context, microbial fuel cells serve the dual purpose of electricity generation and wastewater treatment in a sustainable way. Here, we conducted a set of experiments in two-chambered microbial fuel cell (MFC) to study its efficiency in chemical oxygen demand (COD) removal and electricity generation. The MFC was run at constant pH of 5.5 and mesophilic temperature of 30-32°C using mixed consortia of sediment as inoculum and candy industry wastewater as substrate. of the five different initial substrate concentrations of 2000, 4000, 6000, 8000 and 10000 mg COD/L studied, the highest COD removal efficiency of 96.0% and electricity generation of 810 mV was recorded at the initial substrate concentration of 4000 mg COD/L. The experiments conducted also revealed that iron oxide nanoparticles concentration of 0.10 g/L with an average size of 25.64 nm, increased the electricity generation potential to 870 mV by 6.9%. Among the different species of bioelectricity generating bacteria colonized, Corynebacterium variabile SMS-14 was documented as the most dominant species.

中文翻译：

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使用氧化铁纳米粒子在微生物燃料电池中发电

快速的工业化和人口增长已引起全球对可再生能源的兴趣。在这种情况下，微生物燃料电池以可持续的方式服务于发电和废水处理的双重目的。在这里，我们在两腔微生物燃料电池（MFC）中进行了一组实验，以研究其在化学需氧量（COD）去除和发电方面的效率。MFC在5.5的恒定pH值和30-32°C的中温温度下运行，使用沉淀物的混合体作为接种物，糖果工业废水作为基质。在研究的2000、4000、6000、8000和10000 mg COD / L的五个不同初始底物浓度中，在4000 mg COD / L的初始底物浓度下，最高COD去除效率为96.0％，发电量为810 mV 。进行的实验还表明，铁氧化物纳米粒子的浓度为0.10 g / L，平均大小为25.64 nm，将发电潜力提高到870 mV，提高了6.9％。在不同种类的生物发电细菌中，变异棒状杆菌SMS-14被证明是最主要的物种。