Microbiome structure and function in parallel full-scale aerobic granular sludge and activated sludge processes
Artikel i vetenskaplig tidskrift, 2024

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. Graphical abstract: (Figure presented.).

Diversity

Municipal wastewater treatment

Full scale

Microbial community

Aerobic granular sludge

Conventional activated sludge

Författare

Jennifer Ekholm

Chalmers, Arkitektur och samhällsbyggnadsteknik, Vatten Miljö Teknik

Frank Persson

Chalmers, Arkitektur och samhällsbyggnadsteknik, Vatten Miljö Teknik

Mark de Blois

H2OLAND AB

Oskar Modin

Chalmers, Arkitektur och samhällsbyggnadsteknik, Vatten Miljö Teknik

David Gustavsson

VA SYD

Sweden Water Research

Mario Pronk

TU Delft

Mark C.M. van Loosdrecht

TU Delft

Britt-Marie Wilen

Chalmers, Arkitektur och samhällsbyggnadsteknik, Vatten Miljö Teknik

Applied Microbiology and Biotechnology

0175-7598 (ISSN) 1432-0614 (eISSN)

Vol. 108 1 334

Hur fungerar aerobt granulärt slam jämfört med konventionellt aktivt slam för rening av kommunalt avloppsvatten?

Åke och Greta Lissheds stiftelse (2022-00195), 2022-09-01 -- 2023-06-30.

Ämneskategorier

Vattenteknik

Ekologi

Vattenbehandling

Annan elektroteknik och elektronik

DOI

10.1007/s00253-024-13165-8

PubMed

38739161

Mer information

Senast uppdaterat

2024-05-28