Influence of concentration and profile of volatile fatty acids on the polyhydroxyalkanoate production

  1. Gloria Bravo-Porras 2
  2. Luis Alberto Fernández-Güelfo 1
  3. Carlos José Álvarez-Gallego 2
  4. Luis Isidoro Romero-García 34
  1. 1 Department of Environmental Technologies, CASEM building, University of Cádiz, Puerto Real, 11510, Cádiz, Spain
  2. 2 Department of Chemical Engineering and Food Technology, Faculty of Science, University of Cádiz, Puerto Real, 11510, Cadiz, Spain
  3. 3 Department of Chemical Engineering and Food Technology, Faculty of Science, University of Cádiz,
  4. 4 Puerto Real, 11510, Cadiz, Spain
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Actas:
CeiA3 Congress: 2nd International Workshop on Biorefinery of Lignocellulosic Materials

Editorial: Ámbito Gráfico SSL

ISBN: 978-84-940063-7-1

Año de publicación: 2019

Páginas: 51

Tipo: Aportación congreso

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Resumen

This work analyzes the effect of total acid concentration and the volatile fatty acids (VFA) profile on the polyhydroxyalkanoates production. The research has been developed in batch reactors under oxic conditions and controlled temperature at 25 ºC. The selected inoculum for PHA production came from an active mixed culture. Synthetic mixtures of VFA have been used as substrate. Different total acid concentrations (10 gAcH/L, 15 gAcH/L and 20 gAcH/L) and proportions of butyric and valeric acids (10:1, 1:1 and 1:10) were tested. As result, the best efficiency in the PHA production (25% in dry-cell weight) was achieved in the test with lower total acid concentration (10 gAcH/L) and a ratio 10:1 of butyric and valeric acids respectively. In addition, for the same total acid concentration, it must be highlighted that a time delay on the PHAs production was observed in tests with greater butyric acid proportions.