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• W3012802189 abstract "Oligotrophic nitrifiers and denitrifiers play important roles in the removal of nitrogen from wastewater. Here, we studied the dominant bacterial populations of the sewage treatment ecosystem (STE) water from different processes and those of culture on oligotrophic heterotrophic nitrification (OHN) medium and oligotrophic aerobic denitrification (OAD) medium, using co-analysis of Illumina HiSeq DNA sequencing and traditional culture methods. The results showed that the STE water had no dominant population of oligotrophic nitrifiers or oligotrophic denitrifiers. However, after culturing on OHN medium and OAD medium, the core genera Pseudomonas, Aeromonas, and Acinetobacter that have the nitrogen removal capacity in oligotrophic environments, dominated in the bacterial community. The principal component analysis (PCA) showed that the bacterial community in the constructed rapid infiltration (CRI) effluent water of STE had high similarity with those of cultures on OHN medium and OAD medium, which prompt the special purification role of nitrogen in the CRI system. The sodium alginate immobilized OAD bacteria strain Delftia tsuruhatensis NF4 was isolated from the CRI system, with total nitrogen (TN) removal efficiency of 43.3% in sterilized STE influent water, and 60.1% in OAD medium on day three. The immobilization significantly influenced the TN and nitrate removal efficiency in OAD medium (p < 0.05), but not in sterilized STE influent water (p > 0.05). This study would lay the foundation for resource discovery of oligotrophic heterotrophic nitrifiers and aerobic denitrifiers in STE and further functional application of them on the bioremediation of wastewater.Oligotrophic nitrifiers and denitrifiers play important roles in the removal of nitrogen from wastewater. Here, we studied the dominant bacterial populations of the sewage treatment ecosystem (STE) water from different processes and those of culture on oligotrophic heterotrophic nitrification (OHN) medium and oligotrophic aerobic denitrification (OAD) medium, using co-analysis of Illumina HiSeq DNA sequencing and traditional culture methods. The results showed that the STE water had no dominant population of oligotrophic nitrifiers or oligotrophic denitrifiers. However, after culturing on OHN medium and OAD medium, the core genera Pseudomonas, Aeromonas, and Acinetobacter that have the nitrogen removal capacity in oligotrophic environments, dominated in the bacterial community. The principal component analysis (PCA) showed that the bacterial community in the constructed rapid infiltration (CRI) effluent water of STE had high similarity with those of cultures on OHN medium and OAD medium, which prompt the special purification role of nitrogen in the CRI system. The sodium alginate immobilized OAD bacteria strain Delftia tsuruhatensis NF4 was isolated from the CRI system, with total nitrogen (TN) removal efficiency of 43.3% in sterilized STE influent water, and 60.1% in OAD medium on day three. The immobilization significantly influenced the TN and nitrate removal efficiency in OAD medium (p < 0.05), but not in sterilized STE influent water (p > 0.05). This study would lay the foundation for resource discovery of oligotrophic heterotrophic nitrifiers and aerobic denitrifiers in STE and further functional application of them on the bioremediation of wastewater." @default.
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• W3012802189 date "2020-03-01" @default.
• W3012802189 modified "2023-10-01" @default.
• W3012802189 title "Oligotrophic Nitrification and Denitrification Bacterial Communities in a Constructed Sewage Treatment Ecosystem and Nitrogen Removal of <i>Delftia tsuruhatensis</i> NF4" @default.
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• W3012802189 doi "https://doi.org/10.33073/pjm-2020-013" @default.
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