Performance of a combined electrotrophic and electrogenic biofilm operated under long-term, continuous cycling.

IF 2 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Biotechnology Letters Pub Date : 2024-04-01 Epub Date: 2024-02-01 DOI:10.1007/s10529-023-03450-3

Matthew D Yates, Rebecca L Mickol, Amelia Vignola, Jeffrey W Baldwin, Sarah M Glaven, Leonard M Tender

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引用次数: 0

Abstract

Objectives: Evaluate electrochemically active biofilms as high energy density rechargeable microbial batteries toward providing persistent power in applications where traditional battery technology is limiting (, remote monitoring applications).

Results: Here we demonstrated that an electrochemically active biofilm was able to store and release electrical charge for alternating charge/discharge cycles of up to 24 h periodicity (50% duty cycle) with no significant decrease in average current density (0.16 ± 0.04 A/m²) for over 600 days. However, operation at 24 h periodicity for > 50 days resulted in a sharp decrease in the current to nearly zero. This current crash was recoverable by decreasing the periodicity. Overall, the coulombic efficiency remained near unity within experimental error (102 ± 3%) for all of the tested cycling periods. Electrochemical characterization here suggests that electron transfer occurs through multiple routes, likely a mixture of direct and mediated mechanisms.

Conclusions: These results indicate that bidirectional electrogenic/electrotrophic biofilms are capable of efficient charge storage/release over a wide range of cycling frequency and may eventually enable development of sustainable, high energy density rechargeable batteries.

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在长期、连续循环条件下运行的电营养生物膜和电生化生物膜的性能。

目标：评估电化学活性生物膜作为高能量密度可充电微生物电池，为传统电池技术受限的应用领域（远程监控应用）提供持久电力：评估作为高能量密度可充电微生物电池的电化学活性生物膜，以便在受传统电池技术限制的应用领域（远程监控应用）中提供持久电力：在这里，我们证明了电化学活性生物膜能够在长达 24 小时周期（占空比 50%）的交替充放电循环中储存和释放电荷，且平均电流密度（0.16 ± 0.04 A/m2 ）在 600 多天内没有显著下降。然而，以 24 小时为周期运行超过 50 天后，电流急剧下降，几乎为零。这种电流骤降可以通过降低周期来恢复。总体而言，在所有测试的循环周期内，库仑效率都保持在接近统一的实验误差范围内（102 ± 3%）。这里的电化学特征表明，电子转移是通过多种途径进行的，很可能是直接机制和介导机制的混合体：这些结果表明，双向电生/电养生物膜能够在很宽的循环频率范围内有效地存储/释放电荷，最终可能实现可持续的高能量密度充电电池的开发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biotechnology Letters 工程技术-生物工程与应用微生物

CiteScore

5.90

自引率

3.70%

发文量

108

审稿时长

1.2 months

期刊介绍： Biotechnology Letters is the world’s leading rapid-publication primary journal dedicated to biotechnology as a whole – that is to topics relating to actual or potential applications of biological reactions affected by microbial, plant or animal cells and biocatalysts derived from them. All relevant aspects of molecular biology, genetics and cell biochemistry, of process and reactor design, of pre- and post-treatment steps, and of manufacturing or service operations are therefore included. Contributions from industrial and academic laboratories are equally welcome. We also welcome contributions covering biotechnological aspects of regenerative medicine and biomaterials and also cancer biotechnology. Criteria for the acceptance of papers relate to our aim of publishing useful and informative results that will be of value to other workers in related fields. The emphasis is very much on novelty and immediacy in order to justify rapid publication of authors’ results. It should be noted, however, that we do not normally publish papers (but this is not absolute) that deal with unidentified consortia of microorganisms (e.g. as in activated sludge) as these results may not be easily reproducible in other laboratories. Papers describing the isolation and identification of microorganisms are not regarded as appropriate but such information can be appended as supporting information to a paper. Papers dealing with simple process development are usually considered to lack sufficient novelty or interest to warrant publication.