%0 Journal Article
%T Production of bioemulsifiers by Yarrowia lipolytica in sea water using diesel oil as the carbon source
%A Souza
%A F. A. S. D.
%A Salgueiro
%A A. A.
%A Albuquerque
%A C. D. C.
%J Brazilian Journal of Chemical Engineering
%D 2012
%I Brazilian Society of Chemical Engineering
%R 10.1590/S0104-66322012000100007
%X the objective of this work was to investigate, on a flask scale, the production of bioemulsifiers by yarrowia lipolytica in the presence of sea water, supplemented with nitrogen and phosphate sources, using diesel oil as substrate. a full 24 factorial design was conducted to investigate the effects and interactions of the nutrient concentrations (diesel oil, urea, ammonium sulfate and monobasic potassium phosphate) on the response variables: emulsification activity and surface tension of the cell-free cultures. high emulsification activities (> 5,4 uea) were determined after 168 h in all the experiments. the interactions among diesel oil, urea and monobasic potassium phosphate favored the emulsification with statistical significance. a correlation between the increase of emulsification activity and the reduction of surface tension was not identified.
%K biosurfactant
%K bioemulsifier
%K diesel oil
%K sea water
%K yarrowia lipolytica
%K factorial design.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0104-66322012000100007&lng=en&nrm=iso&tlng=en