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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Sustain. Food Syst. | doi: 10.3389/fsufs.2019.00092

Enhancement of liquid and gaseous biofuels production from agro-industrial residues after thermochemical and enzymatic pretreatment

 Georgia Antonopoulou1, Anastasios Kampranis2,  Ioanna Ntaikou1* and Gerasimos Lyberatos3
  • 1Institute of Chemical Engineering Sciences, Foundation for Research and Technology, Hellas, Greece
  • 2University of Ioannina, Greece
  • 3National Technical University of Athens, Greece

In the present study the effect of thermo-chemical pretreatment and enzymatic hydrolysis on the saccharification and the further bioconversion of two different types of lignocellulosic agro-industrial residues to bio-ethanol and methane, was investigated. The residues used were the sunflower straw (SS) and the cracked olive stones (OS) remaining after olive oil production process. Biomasses were subjected to simultaneous chemical and thermal pre-treatment using either dilute H2SO4 or dilute NaOH aqueous solutions of concentrations 0.5%, 1% and 1.5% (w/v), at 121 oC for 60 min. The saccharification of the complex carbohydrates due to pretreatment was determined in terms of sugars released, and the effect of each pretreatment was evaluated statistically. The effect of the enzymatic hydrolysis of the biomasses using commercial cellulolytic enzymes on saccharification was also assessed and statistically evaluated in terms of different enzymatic loadings. Subsequently, the pre-treated wastes were used as substrate for methane and ethanol production using mixed methanogenic consortia and the yeast Pachysolen tannophilus, respectively.

Keywords: bioethanol, Methane, Enzymtic Hydrolysis, pretreatment, Agroindustrial residues

Received: 30 Jun 2019; Accepted: 02 Oct 2019.

Copyright: © 2019 Antonopoulou, Kampranis, Ntaikou and Lyberatos. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Ioanna Ntaikou, Institute of Chemical Engineering Sciences, Foundation for Research and Technology, Hellas, Patras, 26 504, Greece, ntaikou@iceht.forth.gr