Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/16224
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Title

Bioremediation by composting of heavy oil refinery sludge in semiarid conditions

AuthorsMarín, Antonio; Moreno, J. L. CSIC ORCID; Hernández Fernández, María Teresa; García Izquierdo, Carlos
KeywordsBioremediation
Composting
Ecotoxicity
Oil sludge
Issue DateJun-2006
PublisherSpringer
CitationBiodegradation 17(3): 251-261 (2006)
AbstractThe present work attempts to ascertain the efficacy of low cost technology (in our case, composting) as a bioremediation technique for reducing the hydrocarbon content of oil refinery sludge with a large total hydrocarbon content (250–300 g kg−1), in semiarid conditions. The oil sludge was produced in a refinery sited in SE Spain The composting system designed, which involved open air piles turned periodically over a period of 3 months, proved to be inexpensive and reliable. The influence on hydrocarbon biodegradation of adding a bulking agent (wood shavings) and inoculation of the composting piles with pig slurry (a liquid organic fertiliser which adds nutrients and microbial biomass to the pile) was also studied. The most difficult part during the composting process was maintaining a suitable level of humidity in the piles. The most effective treatment was the one in which the bulking agent was added, where the initial hydrocarbon content was reduced by 60% in 3 months, compared with the 32% reduction achieved without the bulking agent. The introduction of the organic fertiliser did not significantly improve the degree of hydrocarbon degradation (56% hydrocarbon degraded). The composting process undoubtedly led to the biodegradation of toxic compounds, as was demonstrated by ecotoxicity tests using luminescent bacteria and tests on plants in Petri dishes.
Description11 pages, 5 figures, 5 tables.
Publisher version (URL)http://dx.doi.org/10.1007/s10532-005-5020-2
URIhttp://hdl.handle.net/10261/16224
DOI10.1007/s10532-005-5020-2
ISSN0923-9820
E-ISSN1572-9729
Appears in Collections:(CEBAS) Artículos

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