Evidence map›Paper›PMID 38739161›Full record

ArticleApplied microbiology and biotechnology2024

Microbiome structure and function in parallel full-scale aerobic granular sludge and activated sludge processes.

Jennifer Ekholm, Frank Persson, Mark de Blois, Oskar Modin, David J I Gustavsson, Mario Pronk, Mark C M van Loosdrecht, Britt-Marie Wilén

Abstract read
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In one paragraph

Article in Applied microbiology and biotechnology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Jennifer EkholmDivision of Water Environment Technology, Department of Architecture and Civil Engineering, Chalmers University of Technology, Sven Hultins Gata 6, 41296, Gothenburg, Sweden.
Frank PerssonDivision of Water Environment Technology, Department of Architecture and Civil Engineering, Chalmers University of Technology, Sven Hultins Gata 6, 41296, Gothenburg, Sweden.
Mark de BloisH2OLAND, Grindgatan 1, 44136, Alingsås, Sweden.
Oskar ModinDivision of Water Environment Technology, Department of Architecture and Civil Engineering, Chalmers University of Technology, Sven Hultins Gata 6, 41296, Gothenburg, Sweden.
David J I GustavssonSweden Water Research AB, Ideon Science Park, Scheelevägen 15, 22370, Lund, Sweden.
Mario PronkDepartment of Biotechnology, Delft University of Technology, Van Der Maasweg 9, 2629 HZ, Delft, The Netherlands.
Mark C M van LoosdrechtDepartment of Biotechnology, Delft University of Technology, Van Der Maasweg 9, 2629 HZ, Delft, The Netherlands.
Britt-Marie WilénDivision of Water Environment Technology, Department of Architecture and Civil Engineering, Chalmers University of Technology, Sven Hultins Gata 6, 41296, Gothenburg, Sweden. britt-marie.wilen@chalmers.se.ORCID http://orcid.org/0000-0001-6155-7759

Funding

Åke och Greta Lissheds stiftelse 2022-00195Svenskt Vatten 17-122
6 · The paper itself

Abstract

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.

Indexed as

BacteriaBioreactorsMicrobiotaSewageAerobiosisAmmoniaGlycogenNitratesNitritesPhosphatesSwedenWater PurificationAmmoniaGlycogenNitratesNitritesPhosphatesSewageAerobic granular sludgeConventional activated sludgeDiversityFull scaleMicrobial communityMunicipal wastewater treatment

Identifiers

PMID38739161
PMCPMC11090927

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.