NDLI: The impact of zinc oxide nanoparticles on phosphorus removal and the microbial community in activated sludge in an SBR

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Z. R. You, H. Wang, W. Q. Wang, S. T.
Copyright Year	2016
Abstract	The impact of zinc oxide nanoparticles (ZnO NPs) on phosphorus removal and the microbial community was investigated after long-term exposure to a simulated SBR. ZnO NPs at low concentrations (1, 5 mg L−1) did not exert an obvious impact on phosphorus removal, but the removal efficiency decreased by 20% and 75%, respectively, in the presence of 10 and 20 mg L−1 ZnO NPs. At these concentrations, ZnO NPs inhibited the activity of exopolyphosphatase (PPX) and polyphosphate kinase (PPK), and extracellular polymeric substance (EPS) production and destroyed the integrity of cell membranes. High-throughput sequencing analysis revealed that 20 mg L−1 ZnO NPs led to an obvious decrease in the community diversity and a shift in the community structure. In addition, the exposure to 10 and 20 mg L−1 ZnO NPs resulted in a decrease in the proportion of Betaproteobacteria and Rhodocyclales (polyphosphate accumulation organisms, PAOs) in the community and led to a promotion in the growth of Alphaproteobacteria and Gammaproteobacteria (glycogen accumulating organisms, GAOs). These findings meaningfully show the adverse effects of NPs on activated sludge in wastewater treatment.
Starting Page	96706
Ending Page	96713
Page Count	8
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	6
Issue Number	99
Journal	RSC Advances
DOI	10.1039/c6ra19486a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Alphaproteobacteria Activated sludge SBR Extracellular polymeric substance Glycogen Betaproteobacteria Walther PP Wastewater treatment Polyphosphate Gammaproteobacteria Zinc oxide Enhanced biological phosphorus removal Polyphosphate kinase Rhodocyclaceae DNA sequencing
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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The impact of zinc oxide nanoparticles on phosphorus removal and the microbial community in activated sludge in an SBR

Polyphosphate kinase from activated sludge performing enhanced biological phosphorus removal (2002)

Establishment of Enhanced Biological Phosphorus Removal in a Sequencing Batch Reactor by using Seed Sludge from a Conventional Activated Sludge Wastewater Treatment Process

Improved biological phosphorus removal induced by an oxic/extended-idle process using glycerol and acetate at equal fractions

Polyphosphate kinase genes from full-scale activated sludge plants

Polyphosphate kinase genes from activated sludge carrying out enhanced biological phosphorus removal.

Hydrolysis capacity of different sized granules in a full-scale aerobic granular sludge (AGS) reactor.

Phosphorus removal characteristics of granular and flocculent sludge in SBR

Microbial selection of polyphosphate-accumulating bacteria in activated sludge wastewater treatment processes for enhanced biological phosphate removal.

The impact of zinc oxide nanoparticles on phosphorus removal and the microbial community in activated sludge in an SBR

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The impact of zinc oxide nanoparticles on phosphorus removal and the microbial community in activated sludge in an SBR

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