Enhanced Bioethanol Production from Olive Tree Biomass with Different Pretreatment Methods

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Yıldırım Ö., Tunay D., Özkaya B., Demir A.

3rd Bioenergy Studies Symposium, 20 - 21 May 2021, pp.18

  • Publication Type: Conference Paper / Summary Text
  • Page Numbers: pp.18
  • Yıldız Technical University Affiliated: Yes


Olive productivity is conducted in many regions of Turkey. After the harvest of olives, high amounts of olive tree biomass (OTB) waste, one of the lignocellulosic wastes, is formed. It is possible to provide bioenergy recovery from OTB biomass. In this study, the potential of bio-ethanol production by fermentation after different pretreatment methods was evaluated. National Renewable Energy Laboratory (NREL) procedures were used for the determination of moisture, ash, total solids, extractives, acid-soluble and acid-insoluble lignin content of the feedstock. The highest sugar recovery yield was obtained after acid pretreatment. After pretreatment, the solid-liquid phase was separated, and the liquid phase (hydrolysate) was inoculated with Saccharomyces cerevisiae for bioethanol fermentation. Fermentation experiments were carried out in a 4 L fermenter with a working volume of 3.5 L. The amount of ethanol formed as a result of fermentation was measured by gas chromatography. According to the fermentation results, OTB biomass was found to be a very suitable lignocellulosic waste for bioethanol production.