Abstract Scaling-up of Microbial fuel cells (MFC) involves optimizing parameters like the number of units, electrodes and unit size. This study demonstrates the working of a 10 L scale MFC stack for nutrients recovery (struvite as slow phosphorous release fertilizer) and energy recovery from urine over a three-month analysis period. The MFCs employed, a part of three staged systems (pH development, precipitation and treatment), were membrane divided double-chambered, operating in multiple-fed batch mode with a hydraulic retention time of 48 hours. The average removal of chemical oxygen demand (COD) achieved was 75.55 ± 2.8%, with removal rates of 4.252 kg/m3 day. The recovery of Ortho-Phosphates and ammoniacal nitrogen as struvite was 90 ± 1.5% and 46 ± 2.16%. The stacked MFC showed an average open-circuit voltage of 3.29 ± 0.68 V with power density of 14.5 mW/m2. Our findings suggest that the proposed three-stage process employing MFC stack achieved acceptable performance concerning nutrient recovery and organics removal.

中文翻译：

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通过现场规模的微生物燃料电池系统从尿液中回收能量和养分的演示

摘要 微生物燃料电池 (MFC) 的放大涉及优化参数，如单元数量、电极和单元尺寸。本研究展示了 10 L 规模的 MFC 堆在三个月的分析期内用于营养回收（鸟粪石作为缓释磷肥）和尿液能量回收的工作。所采用的 MFC 是三阶段系统（pH 发展、沉淀和处理）的一部分，是膜分离双室，以多进料分批模式运行，水力停留时间为 48 小时。化学需氧量 (COD) 的平均去除率为 75.55 ± 2.8%，去除率为 4.252 kg/m3 天。作为鸟粪石的正磷酸盐和氨氮的回收率为 90 ± 1.5% 和 46 ± 2.16%。堆叠 MFC 的平均开路电压为 3.29 ± 0。68 V，功率密度为 14.5 mW/m2。我们的研究结果表明，所提出的采用 MFC 堆栈的三阶段工艺在养分回收和有机物去除方面取得了可接受的性能。