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- Title
Comparative Study of Alkali and Acidic Cellulose Solvent Pretreatment of Corn Stover for Fermentable Sugar Production.
- Authors
Qianqian Wang; Wei Wei; Xia Li; Jianzhong Sun; Jing He; Mingxiong He
- Abstract
As an immerging lignocellulose pretreatment strategy, cellulose solventbased pretreatment can break down inter- and intra-molecular hydrogen bonds and disrupt the rigid structure of cellulose. Two cellulose solvent pretreatments were examined and compared in this study: NaOH/urea and concentrated phosphoric acid. Pretreated corn stover substrates were characterized by optical microscopy, confocal laser scanning microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and chemical analyses. It was found that both alkaline- and acid-based cellulose solvent pretreatments can disrupt cell wall structures and cause partial dissolution of the cell wall components. The results indicated that the alkaline-based cellulose solvent was more effective at removing lignin as compared with the phosphoric acid-based cellulose solvent. The initial enzymatic saccharification rate of corn stover pretreated by alkaline-based cellulose solvent was greatly enhanced; complete saccharification of the glucans was achieved within 24 h at an enzyme loading of 15 filter paper units (FPU)/g substrate. The enzymatic digestibility of corn stover pretreated by phosphoric acid was lower than that of the alkaline-based system; this was probably caused by the presence of a high concentration of lignin.
- Subjects
PROTOGENIC solvents; CELLULOSE; CORN stover; FERMENTATION; SUGAR industry; HYDROGEN bonding; FOURIER transform infrared spectroscopy
- Publication
BioResources, 2016, Vol 11, Issue 1, p482
- ISSN
1930-2126
- Publication type
Article
- DOI
10.15376/biores.11.1.482-491