Abstract
Microbial degradation of Tapis crude oil contaminated soil by Acinetobacter baumanniiT30C was conducted to evaluate the efficiency of the selected potential hydrocarbon degrader in stimulating bioremediation of crude oil-contaminated soil with different treatment units in microcosms with 2.5 kg soil. Previously, A. baumannii T30C was isolated from a Tapis crude oil-contaminated soil of oil refinery plant, Terengganu, Malaysia. The reduction of residual hydrocarbons in the soil was observed for a period of about 35 days. The study showed that amendment of nutrients was needed for stimulating the growth of A. baumannii T30C and indigenous microorganism in assisting the degradation of residual hydrocarbons in the soil. Key words: Bioremediation, bioaugmentation, aliphatic hydrocarbons, amendment of nutrients.
Highlights
Environmental damage due to the oil spills in the past and recent time has focused on the need for the environment friendly strategies for remediation of the contaminated site
The study showed that amendment of nutrients was needed for stimulating the growth of A. baumannii T30C and indigenous microorganism in assisting the degradation of residual hydrocarbons in the soil
The aim of this study is to evaluate the efficiency of A. baumannii T30C in the remediation of Tapis crude oil-contaminated soil to degrade petroleum hydrocarbons
Summary
Environmental damage due to the oil spills in the past and recent time has focused on the need for the environment friendly strategies for remediation of the contaminated site. Contamination of the environment with crude oil results in pollution, in particular presents a chronic problem to commercial fisheries, recreational resources and public health. Bioremediation is suggested for remediation of contaminated soil sites because of its low cost and its ability to convert contaminants to harmless end products (Rahman et al, 2002; Sathishkumar et al, 2008). Other physical and chemical processes have been used to remove spilled oil from environment; the use of these technologies has not always been successful (Aldrett et al, 1997). Bioremediation, the use of microorganisms or microbial process to degrade environmental contaminants is among these technologies (Boopathy, 2000).
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