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Production and properties of a bioemulsifier synthesized by phenanthrene-degrading Penicillium sp.

Paper ID Volume ID Publish Year Pages File Format Full-Text
36125 45122 2007 5 PDF Available
Title
Production and properties of a bioemulsifier synthesized by phenanthrene-degrading Penicillium sp.
Abstract

In this study, we describe the production and properties of the bioemulsifier synthesized by Penicillium sp. grown in a medium supplemented with 300 mg L−1 of phenanthrene, where bioemulsifier production was not growth-associated. The maximum emulsifier production (2 ± 0.3 g L−1) and emulsifying activity in cell-free culture medium (E24 = 60 ± 4%) were recorded on the 4th and 5th days, respectively. Of the various hydrocarbons tested, the best emulsifying activity was observed for kerosene, diesel, and xylene. The emulsifying agent maintained its properties over a wide range of pH (3–9), at high salinity (20% NaCl), and during exposure to elevated temperatures (93 °C). The fungal bioemulsifier was effective at these extreme environmental conditions and was able to emulsify the tested pure aromatic and aliphatic hydrocarbons and mixtures of the hydrocarbons. The bioemulsifier was composed by lipids (67%), carbohydrates (11%), and protein (7%). Myristic, stearic, and oleic were the major acids detected in the lipidic fraction.

Keywords
Phenanthrene removal; Bioemulsifier; Filamentous fungi; Emulsifying activity; Penicillium sp.
First Page Preview
Production and properties of a bioemulsifier synthesized by phenanthrene-degrading Penicillium sp.
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 3, March 2007, Pages 310–314
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering