Microbial and phage communities as well as their interaction in PO saponification wastewater treatment systems

Viruses or phages were considered affecting microbial community composition, metabolic process, and biogeochemical cycles. However, phage communities and their potential associations with microbial community are not well understood in the activated sludge (AS) of wastewater treatment plants (WWTPs)....

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Bibliographic Details
Published in:Water science and technology 2023-01, Vol.87 (2), p.354-365
Main Authors: Fan, Xiangyu, Ji, Mengzhi, Sun, Kaili, Li, Qiang
Format: Article
Language:English
Subjects:
Activated sludge
Archaea
auxiliary metabolic genes
Bacteria
Bacteria - genetics
Bacteriophages - genetics
Biogeochemical cycle
Biogeochemical cycles
Community composition
Freshwater resources
Genes
Genomes
Metabolic pathways
Metabolism
microbial community
Microorganisms
Network analysis
phage community
Phages
Propylene oxide
propylene oxide saponification wastewater
Sewage - microbiology
Sludge
Taxonomy
Viruses
Wastewater treatment
Wastewater treatment plants
Water pollution
Water Purification
Water treatment
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Summary:Viruses or phages were considered affecting microbial community composition, metabolic process, and biogeochemical cycles. However, phage communities and their potential associations with microbial community are not well understood in the activated sludge (AS) of wastewater treatment plants (WWTPs). In this study, we explored the interactions between phages and microbial community by using propylene oxide (PO) saponification WWTPs as an example. Bacterial, eukaryal and archaeal communities were investigated and 34 phage contigs (>10 kb) were recovered from PO saponification WWTPs. At least 3 complete phage genomes were assembled. In all 34 phages, 21 of them have been predicted to their host. The association network analysis showed that abundant phages were associated with abundant microorganisms. This result conformed to Kill-the-Winner model. Notably, 45 auxiliary metabolic genes (AMGs) were identified from phage genomes (including small contig fragments). They influenced bacterial metabolism through facilitating phages replication and avoiding host death. Collectively, our results suggested that phage community affect microbial community and metabolic pathways by killing their hosts and AMGs transfer in AS of PO saponification WWTPs.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2022.422