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Biodegradation of pyrene by a Pseudomonas aeruginosa strain RS1 isolated from refinery sludge

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Title Biodegradation of pyrene by a Pseudomonas aeruginosa strain RS1 isolated from refinery sludge
 
Creator GHOSH, I
JASMINE, J
MUKHERJI, S
 
Subject HMW PAHs
Pyrene biodegradation kinetics
Growth rate on pyrene
Degradation intermediates
POLYCYCLIC AROMATIC-HYDROCARBONS
MYCOBACTERIUM-VANBAALENII PYR-1
PHENANTHRENE DEGRADATION
SURFACE HYDROPHOBICITY
BURKHOLDERIA STRAINS
BIOAVAILABILITY
IDENTIFICATION
BIOREACTOR
METABOLITE
ANTHRACENE
 
Description High molecular weight (HMW) polynuclear aromatic hydrocarbons (PAHs) with more than three rings are inherently difficult to degrade. Degradation of HMW PAHs is primarily reported for actinomycetes, such as, Rhodococcus and Mycobacterium. This study reports pyrene degradation by a Pseudomonas aeruginosa strain isolated from tank bottom sludge in a refinery. High cell surface hydrophobicity induced during growth on pyrene facilitated its utilization as sole carbon source. Specific growth rate (mu) in the range of 0.03-0.085 h(-1) could be achieved over the concentration range 25-500 mg/L. The specific growth rate and specific pyrene utilization rate increased linearly with increase in total pyrene concentration. Although various degradation intermediates were identified in the aqueous phase, accumulation of total organic carbon (TOC) in the aqueous phase was only a small fraction of TOC equivalents of pyrene lost from the cultures. The degradation pathway appears to be similar to that reported for Mycobacterium sp. PYR-I. (C) 2014 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2014-12-28T16:45:51Z
2014-12-28T16:45:51Z
2014
 
Type Article
 
Identifier BIORESOURCE TECHNOLOGY, 166548-558
0960-8524
1873-2976
http://dx.doi.org/10.1016/j.biortech.2014.05.074
http://dspace.library.iitb.ac.in/jspui/handle/100/16919
 
Language English