Sequential Techniques for Aflatoxin Contaminated Ficus carica L. to Produce Bioethanol

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Çeliktaş M. S.

JOURNAL OF BIOBASED MATERIALS AND BIOENERGY, vol.9, pp.410-416, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 9
  • Publication Date: 2015
  • Doi Number: 10.1166/jbmb.2015.1540
  • Page Numbers: pp.410-416


Companies are obliged to claim and destroy aflotoxin contaminated figs accounting 1% of total exported figs in Turkey. The main objective of this work was to investigate the potential of aflatoxin contaminated Ficus carica L. to be utilized as a biofuel. Hydrothermal pretreatment followed by either acid or enzymatic hydrolyses were optimized. In hydrothermal pretreatment, 165.8 g kg(-1) of reducing sugar was liberated at a solid to liquid ratio of 1:20, 100 degrees C and a treatment time of 90 min corresponding to 37.7% of total sugar available in dried fig samples, followed by acid and enzymatic hydrolyses liberating 253.8 g kg(-1) and 120.3 g kg(-1) reducing sugars, respectively. The highest ethanol concentration was 5986.83 mg/L by the fermentation process using the liquor obtained by hydrothermal treatment followed by enzymatic hydrolysis which was 30.1% higher than the value obtained by consecutive hydrothermal and acid treatments, presenting an alternative for utilization of aflotoxin contaminated figs as a biofuel.