Production of poly(3-hydroxybutyric-co-3-hydroxyvaleric acid) having a high hydroxyvalerate content with valeric acid feeding |
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Authors: | Shilpi Khanna Ashok K Srivastava |
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Institution: | (1) Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India |
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Abstract: | The capability of different organic acids to produce a derivative of PHB poly(3-hydroxybutyric-co-3-hydroxyvaleric acid),
P(3HB-co-3HV)] was examined in shake flask cultivations. Propionic and valeric acids demonstrated the potential to produce
P(3HB-co-3HV) under nitrogen limiting conditions at 30°C. The addition time and the initial concentration of valeric acid
needed for a high cellular HV content were identified by extensive experimentation. Fed-batch cultivation in 7-l bioreactor
with valeric acid feeding resulted in the production of PHA containing 54% HV units. |
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Keywords: | Valeric acid P(3HB-co-3HV) Propionic acid Wautersia eutropha PHB |
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