Abstract The microbial fuel cells (MFCs) are one of the emerging sustainable power sources, that are being effectively used for the simultaneous treatment of wastewater with concomitant generation of electricity. The present study develops a fed-batch process with an optimized level of two microorganisms for concurrent treatment of real dairy wastewater (RDW) and stable power generation using a single-chamber MFC. The MFC exhibits a maximum open circuit voltage of 652 mV at 264 h of fed-batch operation. The unstructured kinetic model suggests that the value of saturation constant (Ks) is 41.67 mg COD/L, indicating mixed culture has a higher affinity towards the utilization of RDW. The fed-batch mode achieves maximum COD removal efficiency of 95.31%, columbic efficiency of 31.58%, a maximum current density of 263 mA/m2, and power density (62.27 mW/m2). The optimum cell voltage and internal resistance of MFC are 0.48 V and 340 Ω, respectively. The study suggests that a fed-batch operation with mixed culture is suitable for the treatment of RDW and able to generate stable power from MFC.

中文翻译：

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通过从实际乳品废水中稳定发电来提高微生物燃料电池性能的策略

摘要 微生物燃料电池（MFCs）是新兴的可持续能源之一，被有效地用于废水的同步处理和发电。本研究开发了一种具有优化水平的两种微生物的补料分批工艺，用于同时处理真正的乳制品废水 (RDW) 并使用单室 MFC 稳定发电。MFC 在 264 小时的补料分批操作中表现出 652 mV 的最大开路电压。非结构化动力学模型表明饱和常数 (Ks) 值为 41.67 mg COD/L，表明混合培养对 RDW 的利用具有更高的亲和力。补料分批模式实现了 95.31% 的最大 COD 去除效率、31.58% 的库伦效率、263 mA/m2 的最大电流密度和功率密度 (62. 27 毫瓦/平方米）。MFC 的最佳电池电压和内阻分别为 0.48 V 和 340 Ω。该研究表明，混合培养的分批补料操作适用于 RDW 的处理，并且能够从 MFC 产生稳定的电力。