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  • Title: Palm oil utilization for the simultaneous production of polyhydroxyalkanoates and rhamnolipids by Pseudomonas aeruginosa.
    Author: Marsudi S, Unno H, Hori K.
    Journal: Appl Microbiol Biotechnol; 2008 Apr; 78(6):955-61. PubMed ID: 18299827.
    Abstract:
    Direct utilization of palm oil for the simultaneous production of polyhydroxyalkanoates (PHAs) and rhamnolipids was demonstrated using Pseudomonas aeruginosa IFO3924. By secreted lipase, palm oil was hydrolyzed into glycerol and fatty acids. Fatty acids became favorable carbon sources for cell growth and PHA production via beta-oxidation and glycerol for rhamnolipid production via de novo fatty acid synthesis. Both PHA and rhamnolipid syntheses started after the nitrogen source was exhausted and cell growth ceased. PHA synthesis continued until all fatty acids were exhausted, and at that time, PHA content in the cells reached a maximum, but stopped despite the remaining glycerol (<2g/l). In contrast, rhamnolipid synthesis continued until glycerol was exhausted.
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