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Saccharification of Sugarcane Bagasse Using an Enzymatic Extract Produced by Aspergillus fumigatus

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This study investigates the efficiency of a crude enzymatic extract produced by Aspergillus fumigatus SCBM6 by solid state fermentation (SSF) in the hydrolysis of alkali pretreated sugarcane bagasse (PTB). After SSF using in natura sugarcane bagasse (SCB), the enzymatic extract presented 21.33 U.g–1 of β-glucosidase and 544.46 U.g–1 of xylanase. The alkaline pretreatment with sodium hydroxide (2% NaOH (w/v) removed 43% of the lignin from PTB and the cellulosic fraction increased to 75%. The hydrolysis was optimized as a function of time, temperature, and concentration of PTB. After hydrolysis, the maximum yield (30.05%) of total released reducing sugars (TRS) was obtained under the following conditions: 24 h, 55 °C, 2% of PTB and 3 U.g–1 of β-glucosidase (CBU). Furthermore, an approximate TRS value (26.4%) was also obtained after saccharification carried out during 6 h, 55 °C, 4% of PTB and 1 CBU. These results indicate that hydrolysis can be performed in a short incubation period and with low enzymatic load for reasonable TRS release.
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Keywords: A. FUMIGATUS; ALKALINE PRETREATMENT; ENZYMATIC HYDROLYSIS; SOLID STATE FERMENTATION; SUGARCANE BAGASSE

Document Type: Research Article

Publication date: 01 March 2018

This article was made available online on 05 September 2017 as a Fast Track article with title: "Saccharification of Sugarcane Bagasse Using an Enzymatic Extract Produced by Aspergillus fumigatus".

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  • The Journal of Renewable Materials (JRM) publishes high quality peer reviewed original research on macromolecules and additives obtained from renewable/biobased resources. Utilizing a multidisciplinary approach, JRM introduces cutting-edge research on biobased monomers, polymers, additives (both organic and inorganic), their blends and composites. It showcases both fundamental aspects and new applications for renewable materials. The fundamental theories and topics pertain to chemistry of biobased monomers, macromoners and polymers, their structure-property relationship, processing using sustainable methods, characterization (spectroscopic, morphological, thermal, mechanical, and rheological), bio and environmental degradation, and life cycle analysis. Demonstration of use of renewable materials and composites in applications including adhesives, bio and environmentally degradable structures, biomedicine, construction, electrical & electronics, mechanical, mendable and self-healing systems, optics, packaging, recycling, shape-memory, and stimulus responsive systems will be presented.
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