Start-up of bioelectrochemical systems (BESs) fed with brewery wastewater was compared at different adjusted anode potentials (-200 and 0 mV vs. Ag/AgCl) and external resistances (50 and 1000 Ω). Current generation stabilized faster with the external resistances (9 ± 3 and 1.70 ± 0.04 A/m3 with 50 and 1000 Ω, respectively), whilst significantly higher current densities of 76 ± 39 and 44 ± 9 A/m3 were obtained with the adjusted anode potentials of -200 and 0 mV vs. Ag/AgCl, respectively. After start-up, when operated using 47 Ω external resistance, the current densities and Coulombic efficiencies of all BESs stabilized to 9.5 ± 2.9 A/m3 and 12 ± 2%, respectively, demonstrating that the start-up protocols were not critical for long-term BES operation in microbial fuel cell mode. With adjusted anode potentials, two times more biofilm biomass (measured as protein) was formed by the end of the experiment as compared to start-up with the fixed external resistances. After start-up, the organics in the brewery wastewater, mainly sugars and alcohols, were transformed to acetate (1360 ± 250 mg/L) and propionate (610 ± 190 mg/L). Optimized start-up is required for prompt BES recovery, for example, after process disturbances. Based on the results of this study, adjustment of anode potential to -200 mV vs. Ag/AgCl is recommended for fast BES start-up.

中文翻译：

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启动对生物电化学系统中啤酒废水的能量回收和组成变化的影响。

在不同的调整阳极电势（-200和0 mV对Ag / AgCl）和外部电阻（50和1000Ω）下，比较了啤酒废水供入的生物电化学系统（BES）的启动。借助外部电阻（分别为50和1000Ω时分别为9±3和1.70±0.04 A / m3），电流生成更快地稳定下来，而通过调整阳极，可获得更高的电流密度，分别为76±39和44±9 A / m3电位分别为-200和0 mV（相对于Ag / AgCl）。启动后，当使用47Ω外部电阻进行操作时，所有BES的电流密度和库仑效率分别稳定在9.5±2.9 A / m3和12±2％，这表明启动协议对于长期而言并不重要微生物燃料电池模式下的长期BES操作。在调整阳极电位的情况下，与具有固定外部电阻的启动相比，到实验结束时形成的生物膜生物量（以蛋白质计）要多两倍。启动后，啤酒厂废水中的有机物（主要是糖和酒精）被转化为乙酸盐（1360±250 mg / L）和丙酸盐（610±190 mg / L）。需要优化的启动来快速恢复BES，例如在过程干扰之后。根据这项研究的结果，建议将阳极电势相对于Ag / AgCl调整至-200 mV，以快速启动BES。需要优化的启动来快速恢复BES，例如在过程干扰之后。根据这项研究的结果，建议将阳极电势相对于Ag / AgCl调整至-200 mV，以快速启动BES。需要优化的启动来快速恢复BES，例如在过程干扰之后。根据这项研究的结果，建议将阳极电势相对于Ag / AgCl调整至-200 mV，以快速启动BES。