Removal of nitrogen by heterotrophic nitrification–aerobic denitrification of a novel halotolerant bacterium Pseudomonas mendocina TJPU04

Excess inorganic nitrogen in water poses a severe threat to enviroment. Removal of inorganic nitrogen by heterotrophic nitrifying–aerobic denitrifying microorganism is supposed to be a promising and applicable technology only if the removal rate can be maintained sufficiently high in real wastewater...

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Veröffentlicht in:Bioprocess and biosystems engineering 2019-05, Vol.42 (5), p.853-866
Hauptverfasser: He, Xiaoling, Sun, Qi, Xu, Tengyao, Dai, Meng, Wei, Dongsheng
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creator He, Xiaoling
Sun, Qi
Xu, Tengyao
Dai, Meng
Wei, Dongsheng
description Excess inorganic nitrogen in water poses a severe threat to enviroment. Removal of inorganic nitrogen by heterotrophic nitrifying–aerobic denitrifying microorganism is supposed to be a promising and applicable technology only if the removal rate can be maintained sufficiently high in real wastewater under various conditions, such as high concentration of salt and wide range of different nitrogen concentrations. Here, a new heterotrophic nitrifying–aerobic denitrifying bacterium was isolated and named as Pseudomonas mendocina TJPU04, which removes NH 4 + -N, NO 3 − -N and NO 2 − -N with average rate of 4.69, 5.60, 4.99 mg/L/h, respectively. It also maintains high nitrogen removal efficiency over a wide range of nitrogen concentrations. When concentration of NH 4 + -N, NO 3 − -N and NO 2 − -N was up to 150, 150 and 50 mg/L, 98%, 93%, and 100% removal efficiency could be obtained, respectively, after 30-h incubation under sterile condition. When it was applied under non-sterile condition, the ammonia removal efficiency was slightly lower than that under sterile condition. However, the nitrate and nitrite removal efficiencies under non-sterile condition were significantly higher than those under sterile condition. Strain TJPU04 also showed efficient nitrogen removal performance in the presence of high concentration of salt and nitrogen. In addition, the removal efficiencies of NH 4 + -N, NO 3 − -N and TN in real wastewater were 91%, 52%, and 75%, respectively. These results suggest that strain TJPU04 is a promising candidate for efficient removal of inorganic nitrogen in wastewater treatment.
doi_str_mv 10.1007/s00449-019-02088-8
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When it was applied under non-sterile condition, the ammonia removal efficiency was slightly lower than that under sterile condition. However, the nitrate and nitrite removal efficiencies under non-sterile condition were significantly higher than those under sterile condition. Strain TJPU04 also showed efficient nitrogen removal performance in the presence of high concentration of salt and nitrogen. In addition, the removal efficiencies of NH 4 + -N, NO 3 − -N and TN in real wastewater were 91%, 52%, and 75%, respectively. 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Removal of inorganic nitrogen by heterotrophic nitrifying–aerobic denitrifying microorganism is supposed to be a promising and applicable technology only if the removal rate can be maintained sufficiently high in real wastewater under various conditions, such as high concentration of salt and wide range of different nitrogen concentrations. Here, a new heterotrophic nitrifying–aerobic denitrifying bacterium was isolated and named as Pseudomonas mendocina TJPU04, which removes NH 4 + -N, NO 3 − -N and NO 2 − -N with average rate of 4.69, 5.60, 4.99 mg/L/h, respectively. It also maintains high nitrogen removal efficiency over a wide range of nitrogen concentrations. When concentration of NH 4 + -N, NO 3 − -N and NO 2 − -N was up to 150, 150 and 50 mg/L, 98%, 93%, and 100% removal efficiency could be obtained, respectively, after 30-h incubation under sterile condition. 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source SpringerNature Journals
subjects Aerobic microorganisms
Ammonia
Bacteria
Biotechnology
Chemistry
Chemistry and Materials Science
Denitrification
Efficiency
Environmental Engineering/Biotechnology
Food Science
Heterotrophic microorganisms
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Nitrates
Nitrification
Nitrogen
Nitrogen dioxide
Nitrogen removal
Pseudomonas
Research Paper
Salinity tolerance
Wastewater treatment
title Removal of nitrogen by heterotrophic nitrification–aerobic denitrification of a novel halotolerant bacterium Pseudomonas mendocina TJPU04
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