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Simultaneous removal of nitrogen and phosphorus by a novel aerobic denitrifying phosphorus-accumulating bacterium, Pseudomonas stutzeri ADP-19.

Abstract：

:A novel denitrifying phosphorus-accumulating bacterium was isolated from contaminated sediment and identified as Pseudomonas stutzeri ADP-19. Bio-safety assays demonstrated that the strain was γ-hemolytic, antibiotic-sensitive, and had no decarboxylase activity. It removed 96.5% of NH4+-N and 73.3% of PO43--P (at initial concentrations of 100 mg/L and 20 mg/L) under aerobic conditions, and the corresponding maximum removal rates were 3.44 and 0.41 mg/L/h, respectively. Nitrogen removal was achieved through a fully nitrification-denitrification pathway [NH4+-N → NH2OH → NO2--N → NO3--N → NO2--N → (NxO) → N2], while phosphorus removal mainly depended on the phosphate assimilation and the excessive poly-P accumulation. Strain ADP-19 also showed a strong salt tolerance within a wide salinity range of 0-5%. The enhanced biological treatment of anaerobic-digested wastewater in a sequencing batch reactor (SBR) indicated that the strain improved the microbial diversity of the activated sludge and significantly enhanced the nitrogen and phosphorus removal efficiency.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Li B,Jing F,Wu D,Xiao B,Hu Z

doi

10.1016/j.biortech.2020.124445

subject

Has Abstract

pub_date

2021-02-01 00:00:00

pages

124445

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(20)31719-3

journal_volume

321

pub_type

杂志文章

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