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

Autor: Afshin Maleki, Ghasemali Mohebali, Hiua Daraei, Nadali Alavi, Loghman Alaei, Alireza Mesdaghinia, Kazem Naddafi
Rok vydání: 2014
Předmět:
Zdroj: Soil and Sediment Contamination: An International Journal. 23:586-597
ISSN: 1549-7887
1532-0383
DOI: 10.1080/15320383.2014.847900
Popis: 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, respectivel...
Databáze: OpenAIRE
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