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Integrated valorization of eucalyptus sawdust within a biorefinery approach by autohydrolysis and organosolv pretreatments

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  • Cebreiros, Florencia
  • Clavijo, Leonardo
  • Boix, Elzeario
  • Ferrari, Mario Daniel
  • Lareo, Claudia

Abstract

Eucalyptus sawdust is a residue from the pulp industry, currently used for energy production. Organosolv and autohydrolysis pretreatments for integrated valorization of this residue within a biorefinery approach was investigated. Organosolv pretreatment was used for selectively extract lignin, and autohydrolysis pretreatment was effective for hemicellulose solubilization. Glucose production of 33.7 g/100 geucalyptus was achieved after organosolv pretreatment, while dissolving 6.4 g/100 geucalyptus of xylan-derived sugars and recovering 10.3 g/100 geucalyptus of lignin after precipitation. After autohydrolysis pretreatment, glucose production of 32.3 g/100 geucalyptus was reached, while 7.5 g/100 geucalyptus of xylan-derived sugars and 2.7 g/100 geucalyptus of acetyl groups were effectively dissolved in a separate liquid stream. Non-ionic surfactant (PEG 6000) was used to enhance cellulose hydrolysis. Integration of a suitable pretreatment and enzymatic hydrolysis steps was shown to be a feasible strategy for the co-production of different value-added products (lignin, xylose, xylo-oligomers, acetic acid), towards a cost-effective eucalyptus biorefinery.

Suggested Citation

  • Cebreiros, Florencia & Clavijo, Leonardo & Boix, Elzeario & Ferrari, Mario Daniel & Lareo, Claudia, 2020. "Integrated valorization of eucalyptus sawdust within a biorefinery approach by autohydrolysis and organosolv pretreatments," Renewable Energy, Elsevier, vol. 149(C), pages 115-127.
    • Handle: RePEc:eee:renene:v:149:y:2020:i:c:p:115-127
    DOI: 10.1016/j.renene.2019.12.024
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    1. Roberto Paz Cedeno, Fernando & Belon de Siqueira, Breno & Gabriel Solorzano Chavez, Eddyn & Ulises Miranda Roldán, Ismael & Moreira Ropelato, Leonardo & Paul Martínez Galán, Julián & Masarin, Fernando, 2022. "Recovery of cellulose and lignin from Eucalyptus by-product and assessment of cellulose enzymatic hydrolysis," Renewable Energy, Elsevier, vol. 193(C), pages 807-820.
    2. Pant, Manish & Pant, Tanuja, 2023. "Maximising biotransformation of pine needles to microbial lipids using Lipomyces starkeyi MTCC 1400T," Renewable Energy, Elsevier, vol. 206(C), pages 574-581.
    3. Mariana S. T. Amândio & Joana M. Pereira & Jorge M. S. Rocha & Luísa S. Serafim & Ana M. R. B. Xavier, 2022. "Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy," Energies, MDPI, vol. 15(11), pages 1-31, June.
    4. Borujeni, Nasim Espah & Alavijeh, Masih Karimi & Denayer, Joeri F.M. & Karimi, Keikhosro, 2023. "A novel integrated biorefinery approach for apple pomace valorization with significant socioeconomic benefits," Renewable Energy, Elsevier, vol. 208(C), pages 275-286.
    5. Özbek, Hatice Neval & Koçak Yanık, Derya & Fadıloğlu, Sibel & Göğüş, Fahrettin, 2020. "Ultrasound-assisted alkaline pre-treatment and its sequential combination with microwave for fractionation of pistachio shell," Renewable Energy, Elsevier, vol. 157(C), pages 637-646.

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