BIODEGRDATION POTENTIALS OF BACTERIA ISOLATED FROM EGYPTIAN HYDROCARBON POLLUTED SOIL ON POLYAROMATIC HYDROCARBONS AND CRUDE OIL | ||
| The International Conference on Chemical and Environmental Engineering | ||
| Article 19, Volume 3, 3rd International Conference On Chemical & Environmental Engineering, May 2006, Pages 106-118 PDF (491.97 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iccee.2006.41072 | ||
| Authors | ||
| Farahat L. A1; El-Gendy N. Sh.1; El-Baz A. F.2 | ||
| 1Egyptian Petroleum Research Institute. | ||
| 2faculty of science, Menoufiya University. | ||
| Abstract | ||
| ABSTRACT Biodegradation of polyaromatic hydrocarbons (PAHs) was performed using hydrocarbon degrading bacteria isolated from Egyptian hydrocarbon polluted soil. Naphthalene (Naph.) was considered as a model of diaromatic ring compounds, while phenanthrene (Phn.) and anthracene (Anth.) were considered as models of tricyclic aromatic hydrocarbons. Eight bacterial strains were isolated from different collected oil polluted soil samples. Only two bacterial isolates; Pseudomonas aeruginosa ALN6 and Brevibacterium casei ALN7 have shown an obvious biodegradation potential of 99.90% and 99.97%, respectively on 1000ppm Phn. after 7 days of incubation. Biodegradation potentiality on Phn. was also examined using PAHs mixture (Naph., Phn. and Anth.) in a total concentration of 1000ppm. Brevibacterium casei ALN7 showed nearly the same biodegradation efficiency on Phn. in both sole substrate and PAHs mixture systems (99.97% and 98.10%, respectively). However, Pseudomonas aeruginosa ALN6 showed a great difference on Phn. in sole substrate and PAHs systems (99.90% and 35.38%, respectively). Biodegradation efficiency of both bacterial isolates was also examined on crude oil. They both showed high biodegradation ability of 97% and 95% for Brevibacterium casei ALN7 and Pseudomonas aeruginosa ALN6, respectively after four weeks of incubation. However, ALN6 was superior for degrading normal and iso- paraffins while ALN7 was superior for degrading unresolved complex mixture (UCM). | ||
| Keywords | ||
| biodegradation; polyaromatic hydrocarbons (PAHs); crude oil; Pseudomonas aeruginosa; Brevibacterium casei | ||
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