Repository of Research and Investigative Information

Repository of Research and Investigative Information

Kurdistan University of Medical Sciences

Biodegradation of Petroleum Hydrocarbons in a Soil Polluted Sample by Oil-Based Drilling Cuttings

(2014) Biodegradation of Petroleum Hydrocarbons in a Soil Polluted Sample by Oil-Based Drilling Cuttings. Soil and Sediment Contamination.

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Microbial degradation of hydrocarbons in soils polluted by oil-based drilling mud and cuttings has been investigated by static methods such as composting or biopiling. Bioremediation of polluted soils by oil-based drilling cuttings through a slurry bioreactor has not previously been reported. The main aim of this work is to monitor hydrocarbon biodegradation in slurry of drilling cuttings and unpolluted soils and the effects of nutrients on it. Indigenous, bacterial-mixed culture isolated from a polluted soil by drilling cuttings adapted to drilling mud concentrations up to 15 (v/v) was done during a 15-month program. The total petroleum hydrocarbons' (TPHs) removal efficiency in C/N/P 100/5/1 ratio was 90.5 and 79.85 under experimental and control conditions, respectively. The microbial count on the first day, 15 � 107 CFUg-1, reached 20 � 109 CFUg-1on the twenty-first day at experimental conditions. The TPH removal efficiency in C/N/P 100/10/2 was 92.5 and 82.25 at experiment and control, respectively. Increasing nitrogen and phosphorous amount couldn't increase microbial count in comparison with C/N/P ratio 100/5/1. The measured biomass contents and microbial counts in experiments were significantly higher than the control and confirmed hydrocarbons' biodegradation during the time. Results showed that slurry bioreactors could accelerate the biodegradation of TPHs and reduce remediation time in soil polluted by oil-based drilling cuttings. © 2014 Copyright Taylor and Francis Group, LLC.

Item Type: Article
Keywords: Experimental conditions; Hydrocarbon biodegradation; Microbial degradation; Petroleum hydrocarbons; Removal efficiencies; Slurry bioreactors; Soil remediation; Total petroleum hydrocarbons, Bioreactors; Bioremediation; Experiments; Hydrocarbons; Microbiology; Oil well drilling; Petroleum chemistry; Soil conservation; Soil pollution; Soils; Well drilling, Biodegradation
Page Range: pp. 586-597
Journal or Publication Title: Soil and Sediment Contamination
Volume: 23
Number: 5
Identification Number: 10.1080/15320383.2014.847900
ISSN: 15320383
Depositing User: مهندس جمال محمودپور

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