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Enzymatic hydrolysis at high-solids loadings for the conversion of agave bagasse to fuel ethanol


  • Caspeta, Luis
  • Caro-Bermúdez, Mario A.
  • Ponce-Noyola, Teresa
  • Martinez, Alfredo


Agave bagasse is the lignocellulosic residue accumulated during the production of alcoholic beverages in Mexico and is a potential feedstock for the production of biofuels. A factorial design was used to investigate the effect of temperature, residence time and concentrations of acid and ethanol on ethanosolv pretreatment and enzymatic hydrolysis of agave bagasse. This method and the use of a stirred in-house-made mini-reactor increased the digestibility of agave bagasse from 30% observed with the dilute-acid method to 98%; also allowed reducing the quantity of enzymes used to hydrolyze samples with solid loadings of 30%w/w and glucose concentrations up to 225g/L were obtained in the enzymatic hydrolysates. Overall this process allows the recovery of 91% of the total fermentable sugars contained in the agave bagasse (0.51g/g) and 69% of total lignin as co-product (0.11g/g). The maximum ethanol yield under optimal conditions using an industrial yeast strain for the fermentation was 0.25g/g of dry agave bagasse, which is 86% of the maximum theoretical (0.29g/g). The effect of the glucose concentration and solid loading on the conversion of cellulose to glucose is discussed, in addition to prospective production of about 50million liters of fuel ethanol using agave bagasse residues from the tequila industry as a potential solution to the disposal problems.

Suggested Citation

  • Caspeta, Luis & Caro-Bermúdez, Mario A. & Ponce-Noyola, Teresa & Martinez, Alfredo, 2014. "Enzymatic hydrolysis at high-solids loadings for the conversion of agave bagasse to fuel ethanol," Applied Energy, Elsevier, vol. 113(C), pages 277-286.
  • Handle: RePEc:eee:appene:v:113:y:2014:i:c:p:277-286
    DOI: 10.1016/j.apenergy.2013.07.036

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    References listed on IDEAS

    1. Srirangan, Kajan & Akawi, Lamees & Moo-Young, Murray & Chou, C. Perry, 2012. "Towards sustainable production of clean energy carriers from biomass resources," Applied Energy, Elsevier, vol. 100(C), pages 172-186.
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    1. Lopes, Verônica dos Santos & Fischer, Janaína & Pinheiro, Tais Magalhães Abrantes & Cabral, Bruna Vieira & Cardoso, Vicelma Luiz & Coutinho Filho, Ubirajara, 2017. "Biosurfactant and ethanol co-production using Pseudomonas aeruginosa and Saccharomyces cerevisiae co-cultures and exploded sugarcane bagasse," Renewable Energy, Elsevier, vol. 109(C), pages 305-310.
    2. Singh, Shuchi & Khanna, Swati & Moholkar, Vijayanand S. & Goyal, Arun, 2014. "Screening and optimization of pretreatments for Parthenium hysterophorus as feedstock for alcoholic biofuels," Applied Energy, Elsevier, vol. 129(C), pages 195-206.
    3. Láinez, Magdiel & Ruiz, Héctor A. & Arellano-Plaza, Melchor & Martínez-Hernández, Sergio, 2019. "Bioethanol production from enzymatic hydrolysates of Agave salmiana leaves comparing S. cerevisiae and K. marxianus," Renewable Energy, Elsevier, vol. 138(C), pages 1127-1133.
    4. Romaní, Aloia & Ruiz, Héctor A. & Teixeira, José A. & Domingues, Lucília, 2016. "Valorization of Eucalyptus wood by glycerol-organosolv pretreatment within the biorefinery concept: An integrated and intensified approach," Renewable Energy, Elsevier, vol. 95(C), pages 1-9.
    5. Moretti, Marcia Maria de Souza & Bocchini-Martins, Daniela Alonso & Nunes, Christiane da Costa Carreira & Villena, Maria Arévalo & Perrone, Olavo Micali & Silva, Roberto da & Boscolo, Maurício & Gomes, 2014. "Pretreatment of sugarcane bagasse with microwaves irradiation and its effects on the structure and on enzymatic hydrolysis," Applied Energy, Elsevier, vol. 122(C), pages 189-195.
    6. Parascanu, M.M. & Sandoval-Salas, F. & Soreanu, G. & Valverde, J.L. & Sanchez-Silva, L., 2017. "Valorization of Mexican biomasses through pyrolysis, combustion and gasification processes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 71(C), pages 509-522.
    7. Cripwell, Rosemary & Favaro, Lorenzo & Rose, Shaunita H. & Basaglia, Marina & Cagnin, Lorenzo & Casella, Sergio & van Zyl, Willem, 2015. "Utilisation of wheat bran as a substrate for bioethanol production using recombinant cellulases and amylolytic yeast," Applied Energy, Elsevier, vol. 160(C), pages 610-617.
    8. Cannella, David & Sveding, Per Viktor & Jørgensen, Henning, 2014. "PEI detoxification of pretreated spruce for high solids ethanol fermentation," Applied Energy, Elsevier, vol. 132(C), pages 394-403.


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