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Characterization of oily sludge from a refinery and biodegradability assessment using various hydrocarbon degrading strains and reconstituted consortia

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Title Characterization of oily sludge from a refinery and biodegradability assessment using various hydrocarbon degrading strains and reconstituted consortia
 
Creator JASMINE, J
MUKHERJI, S
 
Subject PETROLEUM SLUDGE
BACTERIAL CONSORTIUM
MICROBIAL-DEGRADATION
DIESEL OIL
BIOREMEDIATION
SOIL
MANAGEMENT
FIELDS
Oily sludge
Heavy metals
Asphaltenes
Biodegradation
Indigenous microorganisms
Microbial consortia
 
Description Oily sludge obtained from a refinery in India contained 10-11% oil associated with fine particulates. Along with Fe, Ca and Mg various toxic elements were associated with the sludge solids (Pb, Mn, Cu, Zn, As, Bi, Cd, Cr, Co, Ni and V). The oil contained 41-56% asphaltenes and the maltenes comprised of 49 +/- 4%, 42 +/- 2% and 4 +/- 2%, aliphatic, aromatic and polar fractions, respectively. Biodegradation studies with the maltene fraction of oil provided as sole substrate revealed higher degradation by various 3-5 membered reconstituted consortia compared to pure bacterial strains and up to 42 +/- 8% degradation could be achieved over 30 days. In contrast, over the same period up to 71.5 +/- 2% oil degradation could be achieved using dried oily sludge (15% w/v) as sole substrate. Significant biodegradation observed in the un-inoculated controls indicated the presence of indigenous microorganisms in oily sludge. However, large variability in oil degradation was observed in the un-inoculated controls. Greater biodegradation of the maltene fraction led to significant enrichment of asphaltenes in residual oil associated with the sludge. (C) 2014 Elsevier Ltd. All rights reserved.
 
Publisher ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
 
Date 2016-01-14T14:19:55Z
2016-01-14T14:19:55Z
2015
 
Type Article
 
Identifier JOURNAL OF ENVIRONMENTAL MANAGEMENT, 149,118-125
0301-4797
1095-8630
http://dx.doi.org/10.1016/j.jenvman.2014.10.007
http://dspace.library.iitb.ac.in/jspui/handle/100/17711
 
Language en