Kinetics of degradation of jet fuel by Penicillium sp. by biostimulation

Abstract

The biostimulation consists of an effective alternative for the enhancement of bioremediation of xenobiotics by microorganisms. The aim of this study was select and test the biostimulation effect in jet fuel degradation for Penicillium spp.. Initially, the potential to degrade jet fuel was evaluated by oxidation of 2,6 dichlorophenol -indophenol indicator. The biostimulation was performed with 2% of jet fuel in Bushnell Haas culture medium (BH1) and other two modified composition at carbon: nitrogen 23:1 (BH2) and 47:1 (BH3). During 30 day were analyzed pH, biomass and jet fuel residual products by chromatography. Penicillium griseofulvum UFPEDA880 promoted change of indicator after 14 hours and was selected for kinetic biostimulation assay. Biomass production was between 0.04 g/L to 3.6 g/L and BH3 medium favored degradation of nonane, decane, undecane, dodecane, tridecane, tetradecane and pentadecane present in jet fuel. Pencillium griseofulvum is efficient for aliphatic jet fuel degradation when at BH3 medium, being suitable for application in degradation of these compounds.