alexa Bioremediation of oily sludge-contaminated soil by stimulating indigenous microbes.
Chemical Engineering

Chemical Engineering

Journal of Advanced Chemical Engineering

Author(s): Liu W, Luo Y, Teng Y, Li Z, Ma LQ

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Abstract 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. This article was published in Environ Geochem Health and referenced in Journal of Advanced Chemical Engineering

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