This study was based on simultaneous electricity production and bioremediation of synthetic sugar industry wastewater using microbial fuel cells (MFC). Electrogenic microbial source was obtained from a sugar industry wastewater treatment plant. The electrogenic strain was identified as Bacillus cereus according to its biochemical and molecular characteristics. A completely randomized experimental design (open circuit and 1 K, 220 and 50 Ω) was conducted to evaluate the chemical oxygen demand (COD) removal, coulombic efficiency (CE) and power density. The experimental results demonstrated that the B. cereus can use sucrose as an electron donor to generate electricity. At pH 7.0, the MFC generated an open-circuit voltage of 539 ± 22 mV. The maximum CE of 19.44 ± 1.93% and power density of 185.90 mW m⁻² were obtained with an external resistance of 50 Ω, while the COD removal was 70%. The maximum COD removal (82%) and a power density of 121.39 ± 2.12 mW m⁻² were obtained in the MFC connected to an external resistance of 220 Ω. These results demonstrate that an MFC powered with indigenous B. cereus can be used for simultaneous wastewater bioremediation and electricity production but is dependent on the external resistance.

中文翻译：

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微生物燃料电池中微生物分离物在制糖工业废水中的发电和生物修复

这项研究基于利用微生物燃料电池（MFC）同时发电和合成糖业废水的生物修复。从制糖工业废水处理厂获得了微生物来源。根据其生化和分子特征，将该电致源菌株鉴定为蜡状芽孢杆菌。进行了完全随机的实验设计（开路和1 K，220和50Ω）来评估化学需氧量（COD）的去除，库仑效率（CE）和功率密度。实验结果表明蜡状芽孢杆菌可以使用蔗糖作为电子供体来发电。在pH 7.0下，MFC产生539±22 mV的开路电压。在50Ω的外部电阻下获得的最大CE为19.44±1.93％，功率密度为185.90 mW m ^-2，而COD去除率为70％。在连接至220Ω外部电阻的MFC中，获得了最大的COD去除率（82％）和功率密度121.39±2.12 mW m ^-2。这些结果表明，带有本土蜡状芽孢杆菌的MFC可用于同时进行废水生物修复和电力生产，但取决于外部阻力。