Bioremediation of oily sludge-contaminated soil by stimulating indigenous microbes

In situ bioremediation of oily sludge-contaminated soil by biostimulation of indigenous microbes through adding manure was conducted at the Shengli oilfield in northern China. After bioremediation for 360 days, total petroleum hydrocarbon (TPH) content was reduced by 58.2% in the treated plots compa...

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Bibliographic Details
Published in:Environmental geochemistry and health 2010-02, Vol.32 (1), p.23-29
Main Authors: Liu, Wuxing, Luo, Yongming, Teng, Ying, Li, Zhengao, Ma, Lena Q
Format: Article
Language:English
Subjects:
Aromatic hydrocarbons
Bacteria - metabolism
Biodegradation, Environmental
Biodiversity
Bioremediation
China, People's Rep
Colony Count, Microbial
Earth and Environmental Science
Environment
Environmental Chemistry
Environmental cleanup
Environmental Health
Environmental Monitoring
Geochemistry
Hydrocarbons
Kinetics
Manures
Microbial activity
Oil and gas fields
Oil fields
Original Paper
Petroleum - analysis
Petroleum - toxicity
Petroleum hydrocarbons
Physicochemical properties
Polycyclic aromatic hydrocarbons
Public Health
Sludge
Soil contamination
Soil Microbiology
Soil microorganisms
Soil Pollutants - analysis
Soil Pollutants - toxicity
Soil properties
Soil Science & Conservation
Terrestrial Pollution
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Summary:In situ bioremediation of oily sludge-contaminated soil by biostimulation of indigenous microbes through adding manure was conducted at the Shengli oilfield in northern China. After bioremediation for 360 days, total petroleum hydrocarbon (TPH) content was reduced by 58.2% in the treated plots compared with only 15.6% in the control plot. Moreover, bioremediation significantly improved the physicochemical properties of the soil in the treated plot. Soil microbial counts and community-level physiological profiling were also examined. Manure addition increased TPH degraders and polycyclic aromatic hydrocarbon (PAH) degraders in the contaminated soil by one to two orders of magnitude. The activity and biodiversity of soil microbial communities also increased markedly in the treated plot compared with that of the control. Finally, biotoxicity was used to evaluate the soils and a sharp increase in the EC50 of the soil after bioremediation was observed, indicating that bioremediation had reduced the toxicity of the soil.
ISSN:0269-4042
1573-2983
DOI:10.1007/s10653-009-9262-5