Polarization and power density trends of a soil‐based microbial fuel cell treated with human urine,International Journal of Energy Research

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Polarization and power density trends of a soil‐based microbial fuel cell treated with human urine
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-03-27 , DOI: 10.1002/er.5391
Meshack I. Simeon _{1,

2} , Felix U. Asoiro ₃ , Mohamad Aliyu ₁ , Olayinka A. Raji ₄ , Ruth Freitag ₂

Affiliation

Microbial fuel cells (MFCs) are bio‐electrochemical devices that use microbial metabolic processes to convert organic substances into electricity with high efficiency. In this study, the performance of a soil‐based MFC using urine as a substrate was assessed using polarization and power density curves. A single‐chamber, membrane‐less MFC with a carbon‐felt air cathode and a carbon‐felt anode fully buried in biologically active soil was constructed to examine the impact of urine treatment on the performance of the MFC. The peak power of the urine‐treated MFC was 124.16 mW/m² and was obtained 24 hours after the first urine addition; a control MFC showed a value of 65.40 mW/m² in the same period. The treated MFC produced an average power of 70.75 mW/m² up to 21 days after the initial urine addition; the control MFC gave an average value of 4.508 mW/m² over the same period. The average internal resistances of the treated MFC and the control MFC obtained after the initial treatment were 269.94 and 1627.89 Ω, respectively. This study demonstrates the potential of human urine to reduce internal losses in soil MFCs and to provide stable power densities across various external resistors. These results are propitious for future advancements in soil MFCs for power generation utilizing human urine (a readily available source of nutrients) as a substrate.

中文翻译：

用人类尿液处理的土壤微生物燃料电池的极化和功率密度趋势

微生物燃料电池（MFCs）是一种生物电化学装置，利用微生物代谢过程将有机物质高效地转化为电能。在这项研究中，使用极化和功率密度曲线评估了以尿液为基质的土壤MFC的性能。构造了一个单室，无膜的MFC，其碳毡空气阴极和碳毡阳极完全掩埋在生物活性土壤中，以研究尿液处理对MFC性能的影响。经尿液处理的MFC的峰值功率为124.16 mW / m ²，是在首次添加尿液后24小时获得的；对照MFC在同一时期显示出65.40mW / m ²的值。经过处理的MFC产生的平均功率为70.75 mW / m ²初次添加尿液后最多21天；对照MFC在同一时期的平均值为4.508 mW / m ²。初始处理后，处理过的MFC和对照MFC的平均内阻分别为269.94和1627.89Ω。这项研究证明了人类尿液有可能减少土壤MFC中的内部损失并在各种外部电阻器上提供稳定的功率密度。这些结果有利于土壤MFCs的进一步发展，该MFCs利用人尿（一种容易获得的营养来源）作为基质进行发电。

更新日期：2020-03-27

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