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Improved polycyclic aromatic hydrocarbon degradation in a crude oil by individual and a consortium of bacteria.

Abstract：

:In this study, we report the ability of Stenotrophomonas maltophilia, Ochrobactrum anthropi, Pseudomonas mendocina, Microbacterium esteraromaticum and Pseudomonas aeruginosa to degrade multiple polycyclic aromatic hydrocarbons (PAHs) present in crude oil. The PAHs in the crude oil sample obtained from Digboi oil refinery, India were estimated to be naphthalene (10.0 mg L-1), fluorene (1.9 mg L-1), phenanthrene (3.5 mg L-1) and benzo(b)fluoranthene (6.5 mg L-1). Exposure of individual bacteria to crude oil showed high rate of biodegradation of specific PAHs by M. esteraromaticum, 81.4%-naphthalene; P. aeruginosa, 67.1%-phenanthrene and 61.0%-benzo(b)fluoranthene; S. maltophilia, 47.9%-fluorene in 45 days. However, consortium of these bacteria showed enhanced biodegradation of 89.1%-naphthalene, 63.8%-fluorene, 81% of phenanthrene and 72.8% benzo(b)fluoranthene in the crude oil. The degradation was further improved up to 10% by consortium on addition of 40 μg mL-1 rhamnolipid JBR-425 biosurfactant. These results suggest that the developed bacterial consortium has significant potential in PAH remediation.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Kumari S,Regar RK,Manickam N

doi

10.1016/j.biortech.2018.01.075

subject

Has Abstract

pub_date

2018-04-01 00:00:00

pages

174-179

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)30089-0

journal_volume

254

pub_type

杂志文章

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