Enhancement of Ammonium Oxidation at Microoxic Bioanodes.

ABSTRACT: Bioelectrochemical systems (BESs) are considered to be energy-efficient to convert ammonium, which is present in wastewater. The application of BESs as a technology to treat wastewater on an industrial scale is hindered by the slow removal rate and lack of understanding of the underlying ammonium conversion pathways. This study shows ammonium oxidation rates up to 228 ± 0.4 g-N m^-3 d^-1 under microoxic conditions (dissolved oxygen at 0.02-0.2 mg-O₂/L), which is a significant improvement compared to anoxic conditions (120 ± 21 g-N m^-3 d^-1). We found that this enhancement was related to the formation of hydroxylamine (NH₂OH), which is rate limiting in ammonium oxidation by ammonia-oxidizing microorganisms. NH₂OH was

SUBMITTER: Yan X 

PROVIDER: S-EPMC10413939 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature