Enzyme hydrolysis and ethanol fermentation of dilute ammonia pretreated energy cane.

Autor: Aita GA; Audubon Sugar Institute, Louisiana State University Agricultural Center, 3845 Hwy 75, St. Gabriel, LA 70776, USA. gaita@agcenter.lsu.edu, Salvi DA, Walker MS
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2011 Mar; Vol. 102 (6), pp. 4444-8. Date of Electronic Publication: 2010 Dec 30.
DOI: 10.1016/j.biortech.2010.12.095
Abstrakt: This study is the first one ever to report on the use of high fiber sugarcane (a.k.a. energy cane) bagasse as feedstock for the production of cellulosic ethanol. Energy cane bagasse was pretreated with ammonium hydroxide (28% v/v solution), and water at a ratio of 1:0.5:8 at 160°C for 1h under 0.9-1.1 MPa. Approximately, 55% lignin, 30% hemicellulose, 9% cellulose, and 6% other (e.g., ash, proteins) were removed during the process. The maximum glucan conversion of dilute ammonia treated energy cane bagasse by cellulases was 87% with an ethanol yield (glucose only) of 23 g ethanol/100g dry biomass. The enzymatic digestibility was related to the removal of lignin and hemicellulose, perhaps due to increased surface area and porosity resulting in the deformation and swelling of exposed fibers as shown in the SEM pictures.
(Copyright © 2011 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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