Algae-Bacteria cooperated microbial ecosystem: A self-circulating semiartificial photosynthetic purifying strategy.

IF 8.2 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment Pub Date : 2023-12-20 Epub Date: 2023-09-23 DOI:10.1016/j.scitotenv.2023.167187

Qijun Wang, Chengbin Zhang, Xu Zhao, Ye Wang, Zitong Li, Yunzhu Zhou, Guiping Ren

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引用次数: 0

Abstract

The microbial fuel cell (MFC) is a promising bio-electrochemical technology that enables simultaneous electricity generation and effluent purification. Harnessing solar energy to provide sustainable power for MFC operation holds great potential. In this study, a semiartificial photosynthetic self-circulating MFC ecosystem is successfully established through the collaboration of electrogenic microorganisms and photosynthetic algae. The ecosystem can operate continuously without carbon sources and produces a voltage of 150 mV under irradiation. The irradiation doubles the maximum power density of the ecosystem, reaching 8.07 W/m² compared to dark conditions. The results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) suggest a higher diffusion capacity or faster electron replenishment ability within the ecosystem. Furthermore, the capacity of ecosystem for removing chromium (Cr(VI)) has been investigated comprehensively. Under irradiation, the ecosystem demonstrates a 2.25-fold increase in Cr(VI) removal rate compared to dark conditions. Finally, the results of 16S rRNA amplicon sequencing indicates an increase in the relative abundance of strict and facultative aerobic electroactive bacteria in the ecosystem, including Citrobacter (21 %), Bacillus (15 %) and Enterococcus (6 %). The ecosystem offers a novel, self-sustaining approach to address the challenges of energy recovery and environmental pollution.

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藻类-细菌协同微生物生态系统：一种自循环半人工光合净化策略。

微生物燃料电池（MFC）是一种很有前途的生物电化学技术，能够同时发电和污水净化。利用太阳能为MFC的运行提供可持续的电力具有巨大的潜力。在本研究中，通过产电微生物和光合藻类的合作，成功建立了半人工光合自循环MFC生态系统。生态系统可以在没有碳源的情况下连续运行，并在辐射下产生150 mV的电压。与黑暗条件相比，辐射使生态系统的最大功率密度增加了一倍，达到8.07 W/m2。循环伏安法（CV）和电化学阻抗谱（EIS）的结果表明，在生态系统中具有更高的扩散能力或更快的电子补充能力。此外，还对生态系统对铬（Cr（VI））的去除能力进行了全面的研究。与黑暗条件相比，在辐照下，生态系统的Cr（VI）去除率提高了2.25倍。最后，16S rRNA扩增子测序结果表明，生态系统中严格和兼性需氧电活性细菌的相对丰度增加，包括柠檬酸杆菌（21%）、芽孢杆菌（15%）和肠球菌（6%）。生态系统提供了一种新颖的、自我维持的方法来应对能源回收和环境污染的挑战。

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

Science of the Total Environment 环境科学-环境科学

CiteScore

17.60

自引率

10.20%

发文量

8726

审稿时长

2.4 months

期刊介绍： The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere. The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.