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Insights into polyaromatic hydrocarbon biodegradation by Pseudomonas stutzeri CECT 930: operation at bioreactor scale and metabolic pathways

Insights into polyaromatic hydrocarbon biodegradation by Pseudomonas stutzeri CECT 930: operation... Contamination of the environment with polycyclic aromatic hydrocarbons is one of the major problems facing the industrialized nations today. In this work, Pseudomonas stutzeri CET 930 was studied for the first time as bioremediation agent for the degradation of effluents containing phenanthrene, pyrene and benzanthracene, both individually and mixed. The promising results of degradation obtained at flask scale (92, 63 and 94 % in 7 days, respectively) marks the onset of the operation at bench scale bioreactor. The overall biotransformation of phenanthrene, pyrene and benzanthracene in batch operation mode was 95, 78 and 82 % when present individually, and 100, 98 and 100 % when carrying out the biological process in cometabolic conditions, respectively. We have demonstrated the great versatility of this strain for the degradation of structurally different contaminants, such as metal working fluids, polycyclic aromatic hydrocarbons or insecticides such as chlorpyrifos, which makes it a suitable candidate to be applied at industrial scale. In all cases, the experimental data were successfully fitted to models, which turned out to be valuable tools to classify the metabolites involved in the biodegradation process as biomass-related. Since a complete mineralization was pursued, the metabolic pathways of the studied contaminants have been proposed based on gas chromatography–mass spectrometry data. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Environmental Science and Technology Springer Journals

Insights into polyaromatic hydrocarbon biodegradation by Pseudomonas stutzeri CECT 930: operation at bioreactor scale and metabolic pathways

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References (45)

Publisher
Springer Journals
Copyright
Copyright © 2014 by Islamic Azad University (IAU)
Subject
Environment; Environment, general; Environmental Science and Engineering; Environmental Chemistry; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution; Soil Science & Conservation; Ecotoxicology
ISSN
1735-1472
eISSN
1735-2630
DOI
10.1007/s13762-014-0498-y
Publisher site
See Article on Publisher Site

Abstract

Contamination of the environment with polycyclic aromatic hydrocarbons is one of the major problems facing the industrialized nations today. In this work, Pseudomonas stutzeri CET 930 was studied for the first time as bioremediation agent for the degradation of effluents containing phenanthrene, pyrene and benzanthracene, both individually and mixed. The promising results of degradation obtained at flask scale (92, 63 and 94 % in 7 days, respectively) marks the onset of the operation at bench scale bioreactor. The overall biotransformation of phenanthrene, pyrene and benzanthracene in batch operation mode was 95, 78 and 82 % when present individually, and 100, 98 and 100 % when carrying out the biological process in cometabolic conditions, respectively. We have demonstrated the great versatility of this strain for the degradation of structurally different contaminants, such as metal working fluids, polycyclic aromatic hydrocarbons or insecticides such as chlorpyrifos, which makes it a suitable candidate to be applied at industrial scale. In all cases, the experimental data were successfully fitted to models, which turned out to be valuable tools to classify the metabolites involved in the biodegradation process as biomass-related. Since a complete mineralization was pursued, the metabolic pathways of the studied contaminants have been proposed based on gas chromatography–mass spectrometry data.

Journal

International Journal of Environmental Science and TechnologySpringer Journals

Published: Jan 30, 2014

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