MESSAI.iO

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82% confidence

This study demonstrates that Acidimicrobiaceae sp. A6, a Feammox bacterium, can oxidize ammonium anaerobically in microbial electrolysis cells (MECs) using the anode as an electron acceptor instead of ferric iron. Pure and enrichment cultures of A6 achieved ammonium removal rates comparable to batch cultures with Fe(III), with maximum current densities of 4.2 A m⁻³ and coulombic efficiencies up to 16.4%. The electron shuttle AQDS significantly enhanced electron transfer, particularly for pure cultures, enabling this bioelectrochemical approach for sustainable ammonium removal.

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What they did

System
MEC

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Abstract

Schematic of a biotic MEC with Feammox bacterium Acidimicrobiaceae sp. A6 culture. NH 4 + is oxidized to NO 2 − at the anode and H + is reduced to form H 2 at the cathode.

Keywords

ElectrolysisCathodeAmmoniumAnodeInorganic chemistryNuclear chemistry

Identifiers

DOI
10.1039/c9ew00366e
Journal
Environmental Science Water Research & Technology
Year
2019