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A comparison of microbial fuel cell and microbial electrolysis cell biosensors for real-time environmental monitoring
Bioelectrochemistry ( IF 5 ) Pub Date : 2018-12-01 , DOI: 10.1016/j.bioelechem.2018.11.007
Ademola Adekunle , Vijaya Raghavan , Boris Tartakovsky

This study compares the biosensing performance of a microbial fuel cell (MFC) and a microbial electrolysis cell (MEC). Initial tests provided a qualitative comparison of MFC and MEC currents after the anode compartment liquid (anolyte) was spiked with acetate, or sulphates of NH4+, Na+, Mg2+, Fe2+, or a fertilizer solution. Current measurements showed that the MFC sensor had a faster response time, higher sensitivity, and faster recovery time after the spike. Following the spike tests, the MFC and MEC were operated in a continuous flow mode at several influent concentrations of acetate, and sulphates of NH4+, Na+, and Fe2+. The continuous flow tests confirmed the better performance of the MFC sensor, which was selected for further experiments. Two MFC sensors were used for real-time (on-line) COD measurements of brewery wastewater. Regression analysis showed a strong correlation between the MFC power output and COD concentrations in the anode compartment with a coefficient of determination (R2) of 0.97. Overall, results of this study suggest that an MFC-based sensor can be successfully used as a simple and cost-efficient real-time monitoring tool.



中文翻译:

用于实时环境监测的微生物燃料电池和微生物电解池生物传感器的比较

这项研究比较了微生物燃料电池(MFC)和微生物电解池(MEC)的生物传感性能。初始测试提供了在阳极室液体(阳极电解液)中加乙酸盐或NH 4 +,Na +,Mg 2 +,Fe 2+或硫酸盐的硫酸盐溶液后,MFC和MEC电流的定性比较。当前的测量结果表明,MFC传感器具有更快的响应时间,更高的灵敏度和尖峰之后的更快恢复时间。进行峰值测试后,MFC和MEC在连续进水模式下以几种进水浓度的乙酸盐以及NH 4 +,Na +和Fe 2+的硫酸盐进行操作。。连续流量测试证实了MFC传感器的更好性能,它被选择用于进一步的实验。两个MFC传感器用于啤酒废水的实时(在线)COD测量。回归分析表明,MFC的功率输出与阳极室中的COD浓度之间具有很强的相关性,测定系数(R 2)为0.97。总体而言,这项研究的结果表明,基于MFC的传感器可以成功地用作简单且经济高效的实时监控工具。

更新日期:2018-12-01
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