Microbiome structure and function in parallel full-scale aerobic granular sludge and activated sludge processes.
Aerobic granular sludge
Conventional activated sludge
Diversity
Full scale
Microbial community
Municipal wastewater treatment
Journal
Applied microbiology and biotechnology
ISSN: 1432-0614
Titre abrégé: Appl Microbiol Biotechnol
Pays: Germany
ID NLM: 8406612
Informations de publication
Date de publication:
13 May 2024
13 May 2024
Historique:
received:
19
02
2024
accepted:
01
05
2024
revised:
30
04
2024
medline:
13
5
2024
pubmed:
13
5
2024
entrez:
13
5
2024
Statut:
epublish
Résumé
Aerobic granular sludge (AGS) and conventional activated sludge (CAS) are two different biological wastewater treatment processes. AGS consists of self-immobilised microorganisms that are transformed into spherical biofilms, whereas CAS has floccular sludge of lower density. In this study, we investigated the treatment performance and microbiome dynamics of two full-scale AGS reactors and a parallel CAS system at a municipal WWTP in Sweden. Both systems produced low effluent concentrations, with some fluctuations in phosphate and nitrate mainly due to variations in organic substrate availability. The microbial diversity was slightly higher in the AGS, with different dynamics in the microbiome over time. Seasonal periodicity was observed in both sludge types, with a larger shift in the CAS microbiome compared to the AGS. Groups important for reactor function, such as ammonia-oxidising bacteria (AOB), nitrite-oxidising bacteria (NOB), polyphosphate-accumulating organisms (PAOs) and glycogen-accumulating organisms (GAOs), followed similar trends in both systems, with higher relative abundances of PAOs and GAOs in the AGS. However, microbial composition and dynamics differed between the two systems at the genus level. For instance, among PAOs, Tetrasphaera was more prevalent in the AGS, while Dechloromonas was more common in the CAS. Among NOB, Ca. Nitrotoga had a higher relative abundance in the AGS, while Nitrospira was the main nitrifier in the CAS. Furthermore, network analysis revealed the clustering of the various genera within the guilds to modules with different temporal patterns, suggesting functional redundancy in both AGS and CAS. KEY POINTS: • Microbial community succession in parallel full-scale aerobic granular sludge (AGS) and conventional activated sludge (CAS) processes. • Higher periodicity in microbial community structure in CAS compared to in AGS. • Similar functional groups between AGS and CAS but different composition and dynamics at genus level.
Identifiants
pubmed: 38739161
doi: 10.1007/s00253-024-13165-8
pii: 10.1007/s00253-024-13165-8
doi:
Substances chimiques
Sewage
0
Glycogen
9005-79-2
Ammonia
7664-41-7
Nitrites
0
Nitrates
0
Phosphates
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
334Subventions
Organisme : Svenskt Vatten
ID : 17-122
Organisme : Åke och Greta Lissheds stiftelse
ID : 2022-00195
Informations de copyright
© 2024. The Author(s).
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