The Biotreatment of Oil-Polluted Seawater by Biosurfactant Producer Halotolerant Pseudomonas aeruginosa Asph2

In this study, a halotolerant Pseudomonas aeruginosa Asph2 was used to bioremediate oil polluted seawater with total petroleum hydrocarbon content of 5 g/L in a batch system using a local, readily available, and commercial nutrient, corn steep liquor. P. aeruginosa Asph2 expressed good biodegradatio...

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Bibliographic Details
Published in:Energy sources. Part A, Recovery, utilization, and environmental effects Recovery, utilization, and environmental effects, 2014-07, Vol.36 (13), p.1429-1436
Main Authors: Ali, H. R., Ismail, D. A., El-Gendy, N. Sh
Format: Article
Language:English
Subjects:
biodegradation
biosurfactant
crude oil
halotolerant
Pseudomonas aeruginosa
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Summary:In this study, a halotolerant Pseudomonas aeruginosa Asph2 was used to bioremediate oil polluted seawater with total petroleum hydrocarbon content of 5 g/L in a batch system using a local, readily available, and commercial nutrient, corn steep liquor. P. aeruginosa Asph2 expressed good biodegradation capabilities for different petroleum hydrocarbon components, recording ≈ 58, 64, 56, 55, and 53% for total petroleum hydrocarbon, saturates, aromatics, asphaltenes, and resins, respectively, within 21 days of incubation at 30°C, pH 7, and 150 rpm. P. aeruginosa Asph2 proved good uptake of crude oil with high production of rhamnolipid biosurfactant. The produced biosurfactant exhibited low surface tension of 36 dyne/cm, low critical micelle concentration of 20 mg/L, and good emulsification index E 24 of 55%.
ISSN:1556-7036
1556-7230
DOI:10.1080/15567036.2014.880092