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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/6003

Title: Biodegradation of oil in oily sludges from steel mills
Authors: BISWAL, BK
TIWARI, SN
MUKHERJI, S
Keywords: bacterial consortium
contaminated soil
petroleum sludge
diesel oil
bioremediation
degradation
waste
india
Issue Date: 2009
Publisher: ELSEVIER SCI LTD
Citation: BIORESOURCE TECHNOLOGY, 100(4), 1700-1703
Abstract: Lab-scale batch studies were conducted to determine the biodegradability of oil associated with oily sludge from a steel mill using two microbial cultures enriched in the laboratory. After 60 days of biodegradation the residual oil content in mill sludge was reduced from 4.5-5% to 2.7-3.0%, corresponding to 40-45% loss with respect to initial. The rate of degradation was different for the two enrichment cultures studied. Significant loss of oil was observed in the un-inoculated controls while loss in the azide killed controls was negligible. Bioavailability limitations and the presence of structurally complex high molecular weight hydrocarbons in lubricating oil are responsible for the slow rate of degradation. Significant loss of oil in un-inoculated controls indicated the presence of indigenous microorganisms in oily mill sludge. The association of biomass with sludge solids and presence of a high level of residual oil may adversely affect the recyclability of iron-fines associated with the sludge. (C) 2008
URI: http://dx.doi.org/10.1016/j.biortech.2008.09.037
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6003
http://hdl.handle.net/10054/6003
ISSN: 0960-8524
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