Remediation trials for hydrocarbon-contaminated sludge from a soil washing process: Evaluation of bioremediation technologies

JOURNAL OF HAZARDOUS MATERIALS

卷:199

Article

Garcia Frutos, F. J.¹  Rubio, A.²  Gimeno, A.²  Fernandez, M. D.³  Carbonell, G.³  Perucha, C.⁴  Laguna, J.⁴ 

[1] CIEMAT, Dept Energy, E-28040 Madrid, Spain

[2] IGME, Madrid 28760, Spain

[3] INIA, Lab Ecotoxicol, Madrid 28040, Spain

[4] HERA AG AMBIENTAL, Madrid 28703, Spain

关键词: Hydrocarbon-contaminated sludge;    Soil washing;    Bioremediation;    Ecotoxicity;   

DOI  :  10.1016/j.jhazmat.2011.11.017

来源: Elsevier

【 摘 要 】

The usual fate of highly contaminated fine products (silt-clay fractions) from soil washing plants is disposal in a dump or thermal destruction (organic contaminants), with consequent environmental impacts. Alternative treatments for these fractions with the aim of on-site reuse are needed. Therefore, the feasibility of two technologies, slurry bioremediation and landfarming, has been studied for the treatment of sludge samples with a total petroleum hydrocarbon (TPH) content of 2243 mg/kg collected from a soil washing plant. The treatability studies were performed at the laboratory and pilot-real scales. The bioslurry assays yielded a TPH reduction efficiency of 57% and 65% in 28 days at the laboratory and pilot scale, respectively. In the landfarming assays, a TPH reduction of 85% in six months was obtained at laboratory scale and 42% in three months for the bioremediation performed in the full-scale. The efficiency of these processes was evaluated by ecotoxicity assessments. The toxic effects in the initial sludge sample were very low for most measured parameters. After the remediation treatments, a decrease in toxic effects was observed in earthworm survival and in carbon mineralisation. The results showed the applicability of two well known bioremediation technologies on these residues, this being a novelty. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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