%D 2011
%N 4
%R 10.2166/wst.2011.211
%O cited By 8
%L scholars2211
%J Water Science and Technology
%X Central composite design (CCD) and response surface methodology (RSM) were employed to optimize four important variables, i.e. amounts of oil, bacterial inoculum, nitrogen and phosphorus, for the removal of selected n-alkanes during bioremediation of weathered crude oil in coastal sediments using laboratory bioreactors over a 60 day experimentation period. The reactors contained 1 kg soil with different oil, microorganisms and nutrients concentrations. The F Value of 26.89 and the probability value (P < 0.0001) demonstrated significance of the regression model. For crude oil concentration of 2, 16 and 30 g per kg sediments and under optimized conditions, n-alkanes removal was 97.38, 93.14 and 90.21 respectively. Natural attenuation removed 30.07, 25.92 and 23.09 n-alkanes from 2, 16 and 30 g oil/kg sediments respectively. Excessive nutrients addition was found to inhibit bioremediation. © IWA Publishing 2011.
%K Bio-augmentation; Biostimulation; Central composite designs; Coastal sediments; F values; n-Alkanes; Natural attenuation; Nutrients concentrations; Oil concentration; Optimized conditions; Petroleum; Regression model; Response surface analysis; Response Surface Methodology; Weathered crude oil, Anoxic sediments; Biodegradation; Bioremediation; Biotechnology; Crude oil; Degradation; Microbiology; Nitrogen removal; Nutrients; Optimization; Organic compounds; Phosphorus; Pollution; Regression analysis; Sedimentology; Surface analysis; Surface properties, Paraffins, alkane; nitrogen; petroleum; phosphorus, alkane; bacterium; biodegradation; bioreactor; bioremediation; coastal sediment; crude oil; nitrogen; optimization; phosphorus; regression analysis, article; attenuation; bacterium; bioreactor; bioremediation; concentration (parameters); controlled study; inoculation; nutrient; probability; response surface method; sediment; surface property; waste component removal, Alkanes; Biodegradation, Environmental; Bioreactors; Environmental Pollutants; Geologic Sediments; Models, Statistical; Nitrogen; Oils; Petroleum; Phosphorus; Regression Analysis, Bacteria (microorganisms)
%P 618-626
%T Response surface analysis and modeling of n-alkanes removal through bioremediation of weathered crude oil
%A L. Mohajeri
%A H.A. Aziz
%A M.A. Zahed
%A S. Mohajeri
%A S.R.M. Kutty
%A M.H. Isa
%V 63