Identification of partial denitrification granulation enhanced by low C/N ratio in the aspect of metabolomics and quorum sensing

Ma, Chenyang; Zeng, Wei; Meng, Qing; Wang, Chunyan; Peng, Yongzhen

doi:10.1016/j.chemosphere.2021.131895

Cited by 26 publications

(4 citation statements)

References 45 publications

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“…2B). In the secreted EPS, the PN/PS ratio informs the aggregation capacity and surface hydrophobicity of the anammox sludge, and the higher its ratio is, the weaker sludge aggregation [39]. In our study, on the whole, the PN/PS ratio increased with prolonged FQ exposure.…”

Section: Characteristics Of Anammox Sludge In Response To Fqssupporting

confidence: 49%

An integrated meta-omics approach reveals the different response mechanisms of two anammox bacteria towards fluoroquinolone antibiotics

Qiao,

Yu,

Ding

et al. 2023

Preprint

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Background: The emerging fluoroquinolone antibiotics (FQs) are highly influential in nitrogen removal from livestock wastewater. However, beyond the capability of nitrogen removal, little is known about the molecular mechanism (e.g., shift of core metabolism and energy allocation) of anaerobic ammonium-oxidizing bacteria(AnAOB) under continuous FQ stress. Results: This study investigated the effectsof ciprofloxacin, ofloxacin and their mixture at concentrations detected in livestock wastewater on an anammox community in membrane bioreactors.It was found 20 μg/L FQs promoted nitrogen removal efficiency and community stability. Integrated meta-omics analysis revealed varied gene expression patterns between the two dominant AnAOB, Candidatus Brocadia sapporoensis (B AnAOB) and Candidatus Kuenenia stuttgartiensis (K AnAOB). The nitrogen metabolic processes were bolstered in B AnAOB, while those involved in anammox pathway of K AnAOB were inhibited. This difference was tentatively attributed to the up-regulation of reactive oxygen species scavenger genes (ccp and dxf) and FQ resistance gene (qnrB72) in B AnAOB. Importantly, most enhanced core biosynthesis/metabolism and close cross-feeding of B AnAOB with accompanying bacteria were also likely to contribute to higher levels of biomass yield and metabolism activity under FQ stress. Conclusions: This finding suggests that B AnAOB has the advantage of higher nitrogen metabolism capacity over K AnAOB in livestock wastewater containing FQs, which is helpful for efficient and stable nitrogen removal by anammox community.

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Section: Characteristics Of Anammox Sludge In Response To Fqssupporting

confidence: 49%

An integrated meta-omics approach reveals the different response mechanisms of two anammox bacteria towards fluoroquinolone antibiotics

Qiao,

Yu,

Ding

et al. 2023

Preprint

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“…Different amino acids can be easily interconverted and many polysaccharide precursors were used for amino acid synthesis. 22 The increase of PN was signicantly larger than that of PS between different zones, indicating that PN, as the main component of EPSs in this experiment, effectively reected the metabolism and activity of microorganisms. 19 This explained why the strongest denitrication was observed in the top zone and the weakest one in the middle zone.…”

Section: Characteristics Of Epss Along the Vertical Direction Of Dnbf-wementioning

confidence: 68%

Vertical spatial denitrification performance and microbial community composition in denitrification biofilters coupled with water electrolysis

Tang,

Huang,

Tan

et al. 2024

RSC Adv.

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“…The operation of an AGS reactor also affected the QS in biomass. Partially denitrified granular sludge had stronger AHLs-based QS than denitrified granular sludge [35].…”

Section: Composition Of Polymers In Biomassmentioning

confidence: 93%

Biopolymers in Aerobic Granular Sludge—Their Role in Wastewater Treatment and Possibilities of Re-Use in Line with Circular Economy

Cydzik‐Kwiatkowska

2021

Energies

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Aerobic granular sludge (AGS) technology for wastewater treatment ensures better quality effluent and higher process sustainability than wastewater treatment systems based on activated sludge. One of the reasons for the better operational results of AGS systems is the high content of extracellular polymers (EPS) in the granule structures. EPS produced during granulation have a very complex composition with a predo minance of polysaccharides and proteins, and one of the main components, alginate, may have a wide variety of practical applications. This review summarizes up-to-date information on the composition of EPS in AGS, the manner in which their production and composition are affected by the operational parameters of wastewater treatment, and the effects of EPS in biomass on wastewater treatment and sludge management. Additionally, the possibility of polymer recovery from AGS is presented together with information regarding potential applications based on the newest findings. Re-use of AGS-derived polymers will increase the sustainability of wastewater treatment processes by making them more economical and reducing the amount of sludge that requires management.

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Identification of partial denitrification granulation enhanced by low C/N ratio in the aspect of metabolomics and quorum sensing

Cited by 26 publications

References 45 publications

An integrated meta-omics approach reveals the different response mechanisms of two anammox bacteria towards fluoroquinolone antibiotics

An integrated meta-omics approach reveals the different response mechanisms of two anammox bacteria towards fluoroquinolone antibiotics

Vertical spatial denitrification performance and microbial community composition in denitrification biofilters coupled with water electrolysis

Biopolymers in Aerobic Granular Sludge—Their Role in Wastewater Treatment and Possibilities of Re-Use in Line with Circular Economy

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