The effect of anode hydrodynamics on the sensitivity of microbial fuel cell based biosensors and the biological mechanism.,Bioelectrochemistry

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The effect of anode hydrodynamics on the sensitivity of microbial fuel cell based biosensors and the biological mechanism.
Bioelectrochemistry ( IF 4.8 ) Pub Date : 2019-11-18 , DOI: 10.1016/j.bioelechem.2019.107351
Yue Yi ₁ , Beizhen Xie ₁ , Ting Zhao ₁ , Ziniu Qian ₁ , Hong Liu ₁

Affiliation

Fluid dynamics in the anodic chamber of a microbial fuel cell (MFC) is a key factor affecting the distribution of substrates and the efficiency of mass transport. However, the effect of hydrodynamics on MFC based biosensor (MFC-Biosensor) sensitivity has not been established. In this study, the three-dimension anode flow field of a two chamber MFC was visualized, and anodic configuration optimized by a reasonable serpentine flow field and inlet/outlet settings. Through optimization, the proportion of the dead zone in the anodic configuration decreased by 14.1%, and the velocity at the anode surface increased by 334.6% with better homogeneity of distribution. Moreover, electricity production and the sensitivity of MFC-Biosensors was improved by 42.0%, 46.1% and 52.3% for the detection of CTC, AVM and Hg, respectively. Biofilm viability analysis further proved that the enhanced surface velocity was of benefit for the permeation of toxicants into anodic biofilms, thus improving the sensor performance.

中文翻译：

阳极流体动力学对基于微生物燃料电池的生物传感器的敏感性及其生物学机制的影响。

微生物燃料电池（MFC）阳极室中的流体动力学是影响基质分布和质量传输效率的关键因素。但是，流体动力学对基于MFC的生物传感器（MFC-Biosensor）灵敏度的影响尚未确定。在这项研究中，可视化了两室MFC的三维阳极流场，并通过合理的蛇形流场和入口/出口设置优化了阳极配置。通过优化，阳极构型中死区的比例降低了14.1％，阳极表面的速度提高了334.6％，分布均匀性更好。此外，用于检测CTC，AVM和Hg的电力和MFC生物传感器的灵敏度分别提高了42.0％，46.1％和52.3％。

更新日期：2019-11-18

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