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Poly(3-hydroxybutyrate) production by Cupriavidus necator using waste glycerol

Cavalheiro, João M.B.T. ; de Almeida, M. Catarina M.D. ; Grandfils, Christian ; da Fonseca, M.M.R.

Process biochemistry (1991), 2009-05, Vol.44 (5), p.509-515 [Periódico revisado por pares]

Elsevier Ltd

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  • Título:
    Poly(3-hydroxybutyrate) production by Cupriavidus necator using waste glycerol
  • Autor: Cavalheiro, João M.B.T. ; de Almeida, M. Catarina M.D. ; Grandfils, Christian ; da Fonseca, M.M.R.
  • Assuntos: Biochemistry, biophysics & molecular biology ; Biochimie, biophysique & biologie moléculaire ; Biodiesel ; Cupriavidus necator DSM 545 ; Fermentation ; Glycerol ; Life sciences ; Poly(3-hydroxybutyrate) ; Sciences du vivant ; Waste GRP
  • É parte de: Process biochemistry (1991), 2009-05, Vol.44 (5), p.509-515
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    ObjectType-Article-2
    ObjectType-Feature-1
    scopus-id:2-s2.0-64449088957
  • Descrição: Polyhydroxyalkanoates (PHAs) have been recognized as good substitutes for the non-biodegradable petrochemically produced polymers. However, their high (real or estimated) current production cost limits their industrial applications. This work exploits two strategies to enhance PHAs substitution potential: the increase in PHA volumetric productivity in high density cultures and the use of waste glycerol (GRP), a by-product from the biodiesel industry, as primary carbon source for cell growth and polymer synthesis. Cupriavidus necator DSM 545 was used to accumulate poly(3-hydroxybutyrate) (P(3HB)) from GRP and from commercial glycerol (PG) as control substrate. On PG, productivities between 0.6 g PHB L −1 h −1 and 1.5 g PHB L −1 h −1 were attained. The maximum cell DW was 82.5 g DW L −1, the P(3HB) content being 62%. When GRP was used, 68.8 g DW L −1 with a P(3HB) accumulation of 38% resulting in a final productivity of 0.84 g PHB L −1 h −1 was obtained. By decreasing the biomass concentration at which accumulation was triggered, a productivity of 1.1 g PHB L −1 h −1 (50% P(3HB), w/w) was attained using GRP. P(3HB) molecular weights ( M w) ranged from 7.9 × 10 5 to 9.6 × 10 5 Da.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
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