Extracellular electron transfer for aerobic denitrification mediated by the bioelectric catalytic system with zero-carbon source.
Aerobic denitrification
Bioelectric catalytic system
Extracellular electron transfer (EET)
Low energy consumption
Zero carbon source
Journal
Ecotoxicology and environmental safety
ISSN: 1090-2414
Titre abrégé: Ecotoxicol Environ Saf
Pays: Netherlands
ID NLM: 7805381
Informations de publication
Date de publication:
Dec 2023
Dec 2023
Historique:
received:
27
06
2023
revised:
30
10
2023
accepted:
12
11
2023
medline:
4
12
2023
pubmed:
19
11
2023
entrez:
18
11
2023
Statut:
ppublish
Résumé
The slow rate of electron transfer and the large consumption of carbon sources are technical bottlenecks in the biological treatment of wastewater. Here, we first proposed to domesticate aerobic denitrifying bacteria (ADB) from heterotrophic to autotrophic by electricity (0.6 V) under zero organic carbon source conditions, to accelerate electron transfer and shorten hydraulic retention time (HRT) while increasing the biodegradation rate. Then we investigated the extracellular electron transfer (EET) mechanism mediated by this process, and additionally examined the integrated nitrogen removal efficiency of this system with composite pollution. It was demonstrated that compared with the traditional membrane bioreactor (MBR), the BEC displayed higher nitrogen removal efficiency. Especially at C/N = 0, the BEC exhibited a NO
Identifiants
pubmed: 37979359
pii: S0147-6513(23)01195-8
doi: 10.1016/j.ecoenv.2023.115691
pii:
doi:
Substances chimiques
Carbon
7440-44-0
Nitrates
0
Nitrogen
N762921K75
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
115691Informations de copyright
Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Competing Interest Our manuscript has no conflict of interest. I would like to declare on behalf of my co-authors that this work described was original research that has not been published previously, and not under consideration for publication elsewhere in whole or in part. All of the authors listed have approved that the manuscript is enclosed.