Combined process system for the production of bioethanol from sugarcane straw

Author(s)

Oliveira, Luis R. M. ^[1] ; Nascimento, Viviane M. ^[2] ; Goncalves, Adilson R. ^[2] ; Rocha, George J. M. ^[2]

Affiliation

^[1] Univ Sao Paulo, Escola Engn Lorena, Dept Biotecnol, BR-12602810 Lorena, SP - Brazil

^[2] Brazilian Bioethanol Sci & Technol Natl Lab CTBE, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: INDUSTRIAL CROPS AND PRODUCTS; v. 58, p. 1-7, JUL 2014.
• Web of Science Citations: 22

Abstract

This work evaluated the conversion of sugarcane straw into a glucose-rich hydrolysate using a combined process system (CPS) which consists of pretreatment, delignification and enzymatic hydrolysis. The sugarcane straw, with 38.1%, 29.2% and 24.2% of cellulose, hemicellulose and lignin respectively, was submitted to a hydrothermal pretreatment and a delignification process in order to increase the cellulose enzymatic hydrolysis. Straw is the residue to be obtained in sugarcane mills without burning the land previously to the harvesting The CPS, with pretreatment at 190 degrees C, 10 min, showed 95% of hemicellulose solubilization, 78% of lignin removal and 29% of cellulose degradation. The enzymatic hydrolysis of CPS-cellulignins achieved over 60% cellulose conversion. Considering the cellulose content present in the raw sugarcane straw, only 50% was converted into glucose, due to degradation during the CPS and the enzymatic inefficiency in the hydrolysis stage. In addition, the delignification step did not improve the overall cellulose conversion of the sugarcane straw. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 06/07183-0 - Study of viable alternatives for pre-treatment and hydrolysis of sugarcane straw and bagasse to obtain ethanol from cellulose
• Grantee: Luís Ricardo Martins Oliveira
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)