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Abstract <p>Technologies based on microbial fuel cells (MFC) have a high potential in wastewater treatment. The present work describes an easy-to-build two-chamber MFC, which yielded the current of 200–250 μA 10–15 days after inoculation with activated sludge and introduction of acetate as a carbon and energy source. The fuel cell exhibited Coulombic efficiency of 15–21% and the maximum specific power of 6.9 mW/m<sup>2</sup>. The microbial community formed at the anode after two months was enriched with members of the genera <i>Geobacter</i> (15.8%) and <i>Methanosaeta</i> (22.4%). During the following two months, the share of <i>Methanosaeta</i> decreased to 9.9%; it was replaced by members of the phyla <i>Rhodocyclaceae</i>, <i>Competibacteraceae</i>, and <i>Desulfocapsaceae</i>. Direct transfer was the main way of electron transport from the biofilm to the anode.</p>

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Characteristics of a Microbial Fuel Cell and of the Anodic Microbial Community Derived from the Activated Sludge of Waste Treatment Facilities

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • A. G. Dorofeev,
  • Yu. A. Nikolaev,
  • E. V. Gruzdev,
  • A. V. Mardanov,
  • N. V. Pimenov

摘要

Abstract

Technologies based on microbial fuel cells (MFC) have a high potential in wastewater treatment. The present work describes an easy-to-build two-chamber MFC, which yielded the current of 200–250 μA 10–15 days after inoculation with activated sludge and introduction of acetate as a carbon and energy source. The fuel cell exhibited Coulombic efficiency of 15–21% and the maximum specific power of 6.9 mW/m2. The microbial community formed at the anode after two months was enriched with members of the genera Geobacter (15.8%) and Methanosaeta (22.4%). During the following two months, the share of Methanosaeta decreased to 9.9%; it was replaced by members of the phyla Rhodocyclaceae, Competibacteraceae, and Desulfocapsaceae. Direct transfer was the main way of electron transport from the biofilm to the anode.