Olive oil deodorizer distillate (OODD) was used for the first time as the sole substrate for polyhydroxyalkanoates (PHA) production by the bacterium Pseudomonas resinovorans in bioreactor cultivation. A PHA content in the biomass of 36±0.8wt% was attained within 19h of cultivation. A final polymer concentration of 4.7±0.3gL-1 was reached, corresponding to a volumetric productivity of 5.9±0.2gL-1day-1. The PHA was composed of 3-hydroxyoctanoate (48.3±7.3mol%), 3-hydroxydecanoate (31.6±2.6mol%), 3-hydroxyhexanoate (12.1±1.1mol%) and 3-hydroxydodecanoate (8.0±0.7mol%) and it had a glue-like consistency that did not solidify at room temperature. The polymer was highly amorphous, as shown by its low crystallinity of 6±0.2%, with low melting and glass transition temperatures of 36±1.2 and -16±0.8°C, respectively. The polymer exhibited a shear thinning behavior and a mechanical spectrum with a predominant viscous contribution. Its shear bond strength for wood (67±9.4kPa) and glass (65±7.3kPa) suggests it may be used for the development of biobased glues.
|Number of pages||6|
|Journal||International Journal of Biological Macromolecules|
|Publication status||Published - Jan 2016|
- Olive oil deodorizer distillate (OODD)
- Shear bond strength