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Optimal Parameters for in Vitro Development of the Fungus Hydrocarbonoclastic Penicillium sp.

Advances in Chemical Engineering and Science 2013年第4期3卷 19-29页

作者： Marcia Eugenia Ojeda-Morales Miguelángel hernández-Rivera JoséGabriel Martínez-Vázquez Yolanda Córdova-Bautista yuridia evelin hernández-cardeno División Académica de Ingenieria y Arquitectura Universidad Juarez Autonoma de TabascoCunduacanMéxico Facultad de Salud y Ciencias A.F. Universidad SEKSantiagoChile

México has extensive areas that have been impacted by oil spills for several decades. Current bioremediation technologies mostly used microorganisms to decontaminate sites with hydrocarbons. This research evaluated the conditions for the optimal development of the strain of a hydrocarbonoclastic fungus, which was found in samples of soil contaminated with 4.0 × 105 mg·kg-1 of Total Petroleum Hydrocarbons (TPH). A completely randomized experimental design with a 3 × 3 × 4 factor arrangement was used: three levels of temperature (T1 = 29℃, T2 = 35℃ and T3 = 40℃), three of pH (pH1 = 3.5, pH2 = 5.0 and pH3 = 6.0) and four nutrients (N1 = Urea, N2 = Triple-17, N3 = Nitrophoska-Blue and N4 = Pure-Salts). Total fungi were isolated from the sampled soil and were sown in a combined carbon medium for hydrocarbonoclastic fungi and a strain was selected to be adapted to a liquid mineral medium. The selected strain was classified as Penicillium sp. Analyses of variance and mean tests were performed, using the SPSS-11.0 statistical software. The microorganisms showed the highest population growth in the treatment N2pH2T1, which reached a value of 2.1 × 106 CFU·mL-1 in a biorreactor. To reach it, by bioaugmentation, the same development of Penicillium sp. in a conditioned soil would allow to implement a bioremediation strategy with great potential to retrieve soil contaminated with hydrocarbons both in Tabasco and in general in Mexico.

关键词： Hydrocarbon Degraders Optimal Growth Penicillium sp. Hydrocarbonoclastic

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