Effect of addition ofPseudomonas aeruginosa UG2 inocula or biosurfactants on biodegradation of selected hydrocarbons in soil

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Abstract
A laboratory study was undertaken to assess the effect of adding eitherPseudomonas aeruginosa UG2 cells or the biosurfactants produced by this m microorganism on the biodegradation of a hydrocarbon mixture in soil at 20°C over a 2-month incubation period. The addition of 100 μg of UG2 biosurfactants per g soil significantly enhanced the degradation of tetradecane, hexadecene and pristane but not 2-methylnaphthalene, the most water-soluble of the hydrocarbons. Addition of UG2 cells at densities of 106, 107, and 108 per g soil did not have a significant effect on biodegradation of the hydrocarbon mixture.