Recovery of contaminated marine environments by biosurfactant-enhanced bioremediation

Colloids and Surfaces. B, Biointerfaces
Elias J SilvaLeonie A Sarubbo

Abstract

The need to remediate areas contaminated by petroleum products has led to the development of novel technologies for treating such contaminants in a non-conventional manner, that is, without the use of chemical or physical methods. Biosurfactants are amphipathic biomolecules produced by microorganisms that can be used in bioremediation processes in environments contaminated by petroleum products due to their excellent tensioactive properties. The aim of the present study was to produce a biosurfactant from Pseudomonas aeruginosa UCP 0992 cultivated in 0.5% corn steep liquor and 4.0% vegetable oil residue in a 1.2-L bioreactor employing a central composite rotatable design to optimize the cultivation conditions for maximum yield. The best results were achieved with aeration rate of 1.0 vvm and 3.0% inoculum at 225 rpm for 120 h, resulting in a surface tension of 26.5 mN/m and a biosurfactant yield of 26 g/L. Kinetic and static assays were then performed with the biosurfactant for the removal of motor oil adsorbed to sand, with removal rates around 90% and 80%, respectively, after 24 h. Oil degradation experiments with the bacterium and the combination of the bacterium and biosurfactant were also conducted to simulate the bioremed...Continue Reading

Citations

Aug 28, 2020·Applied Microbiology and Biotechnology·Jingjing JiangXuwei Long
Dec 24, 2020·Annals of Global Health·Philip J LandriganPatrick Rampal
Feb 19, 2019·International Journal of Biological Macromolecules·Juliana M FariasLeonie A Sarubbo
Feb 5, 2022·Environmental Monitoring and Assessment·Ivison A SilvaLeonie A Sarubbo

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