alexa Use of a new Trichoderma harzianum strain isolated from the Amazon rainforest with pretreated sugar cane bagasse for on-site cellulase production.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Delabona Pda S, Farinas CS, da Silva MR, Azzoni SF, Pradella JG

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Abstract The on-site production of cellulases is an important strategy for the development of sustainable second-generation ethanol production processes. This study concerns the use of a specific cellulolytic enzyme complex for hydrolysis of pretreated sugar cane bagasse. Glycosyl hydrolases (FPase, xylanase, and β-glucosidase) were produced using a new strain of Trichoderma harzianum, isolated from the Amazon rainforest and cultivated under different conditions. The influence of the carbon source was first investigated using shake-flask cultures. Selected carbon sources were then further studied under different pH conditions using a stirred tank bioreactor. Enzymatic activities up to 121 FPU/g, 8000 IU/g, and 1730 IU/g of delignified steam-exploded bagasse+sucrose were achieved for cellulase, xylanase and β-glucosidase, respectively. This enzymatic complex was used to hydrolyze pretreated sugar cane bagasse. A comparative evaluation, using an enzymatic extract from Trichoderma reesei RUTC30, indicated similar performance of the T. harzianum enzyme complex, being a potential candidate for on-site production of enzymes. Copyright © 2011 Elsevier Ltd. All rights reserved. This article was published in Bioresour Technol and referenced in Journal of Microbial & Biochemical Technology

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