Carlos Martín, Cristhian Carrasco, Leif J. Jönsson, Luis Romero-Soto, Diego Chambi, Alfredo Oliva-Taravilla

Research output: Contribution to journalConference articlepeer-review


Using local residues as raw materials for biorefineries is important for sustainable development. Quinoa stalks can be considered raw materials of choice for local biorefinery initiatives in Bolivia. This investigation aims at proposing a biorefinery process to be applied to quinoa residues using our know-how on lignocellulose bioconversion and the asset of robust microbes isolated from extreme environments. The proposed process consists in treating quinoa stalks in a sequence including extraction of saponins, acid hydrolysis of hemicelluloses and enzymatic saccharification of cellulose for producing hydrolysates to be used in bioconversion processes with different alternative microbes. Saponins are extracted with aqueous ethanol, the saponins-free material is subjected to sulfuricacid-catalyzed hydrothermal pretreatment for separating a stream of hemicellulosic sugars and a cellulignin stream that is then saccharified with commercial cellulases. The extracted saponins can further be processed to value-added products or can be used in the enzymatic saccharification stage for enhancing cellulose conversion. The produced hydrolysates are suitable substrates for producing bacterial biopolymers or ethanol. Residual lignin from the enzymatic saccharification can be upgraded for value-added applications. The results of this investigation show the potential of biorefining of quinoa residues for producing biopolymers using halotolerant bacteria isolated in Bolivian Altiplano.

Original languageEnglish
Pages (from-to)1126-1130
Number of pages5
JournalEuropean Biomass Conference and Exhibition Proceedings
StatePublished - 2022
Event30th European Biomass Conference and Exhibition, EUBCE 2022 - Virtual, Online
Duration: 9 May 202212 May 2022

Bibliographical note

Funding Information:
The Swedish Research Council (2016-05822) and the Bio4Energy research environment. • The Swedish Energy Agency (P41285-1) and the Kempe Foundations (SMK-1653) supported a part of this research.. • Technical staff at the Department of Chemistry, Umeå University, and the core facilities and technical platforms at the Chemical Biological Center (KBC) of Umeå University and of the Swedish University of Agricultural Sciences (SLU) are gratefully acknowledged for the provided support.. • The authors are also thankful to the institutional support by Umeå University and Universidad Mayor de San Andrés. ( funded most of this research.

Publisher Copyright:
© 2022, ETA-Florence Renewable Energies., All rights reserved.


  • Agricultural residues
  • bioethanol
  • biomass
  • biopolymers
  • biorefinery
  • enzymatic hydrolysis


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