Production of poly (3-hydroxybutyrate) from starch by Azotobacter chroococcum

  title={Production of poly (3-hydroxybutyrate) from starch by Azotobacter chroococcum},
  author={Beom Soo Kim and Ho Nam Chang},
  journal={Biotechnology Letters},
Production of poly (3-hydroxybutyrate) (PHB) from starch was investigated in flask, batch, and fed-batch cultures of Azotobacter chroococcum. In flask culture, PHB content increased up to 74% of dry cell wt with increasing culture volume. In batch culture, PHB content increased to 44% with O2 limitation. In fed-batch culture, cell concentration of 71 g/l with 20% PHB was obtained without O2 limitation, whereas cell concentration of 54 g/l with 46% PHB was obtained with O2 limitation. 

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