Bioremediation, polycyclic aromatic hydrocarbons, raw glycerol, cosubstrate, germination index. Page No: 2203-2209

Ulrich Vasconcelos, Fernando Jorge Santos de Oliveira and Francisca Pessoa de França

Keywords: Bioremediation, polycyclic aromatic hydrocarbons, raw glycerol, cosubstrate, germination index.

Abstract: The purpose of this investigation was to evaluate the efficacy of raw glycerol obtained as a by-product from the biodiesel manufacturing industry on the bioremediation of a soil contaminated with 8.43mg/kg of the USEPA 16 priority PAHs. Experiments were carried out using raw glycerol at 0.63, 0.32 and 0.16mg/kg. The second condition resulted in the best PAH biodegradation in 60 days, 68.0±0.1%, confirming that this compound may be used as a cosubstrate and adding value to this residue. Germination Index assay on soil samples proved that bioremediation eliminated the phytotoxic effects.



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