Liquefaction of sugarcane bagasse for enzyme production

Author(s)

Cunha, F. M. ^{[1, 2, 3, 4]} ; Kreke, T. ^{[3, 4]} ; Badino, A. C. ^[2] ; Farinas, C. S. ^{[1, 2]} ; Ximenes, E. ^{[3, 4]} ; Ladisch, M. R. ^{[3, 4]}

Affiliation

^[1] Embrapa Instrumentat, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Grad Program Chem Engn, BR-13565905 Sao Carlos, SP - Brazil

^[3] Purdue Univ, Renewable Resources Engn Lab, W Lafayette, IN 47907 - USA

^[4] Purdue Univ, Dept Agr & Biol Engn, W Lafayette, IN 47907 - USA

• Document type: Journal article
• Source: Bioresource Technology; v. 172, p. 249-252, NOV 2014.
• Web of Science Citations: 14

Abstract

The objective of this paper is to report liquefaction of pretreated and sterilized sugarcane bagasse for enhancing endoglucanase production through submerged fermentation by Aspergillus niger. After initial solid state fermentation of steam pretreated bagasse solids by A. niger, fed-batch addition of the substrate to cellulase in buffer over a 12 h period, followed by 36 h reaction, resulted in a liquid slurry with a viscosity of 0.30 +/- 0.07 Pa s at 30% (w/v) solids. Addition of A. niger for submerged fermentation of sterile liquefied bagasse at 23% w/v solids resulted in an enzyme titer of 2.5 IU mL(-1) or about 15x higher productivity than solid-state fermentation of non-liquefied bagasse (final activity of 0.17 IU mL(-1)). Bagasse not treated by initial solid-state fermentation but liquefied with enzyme gave 2 IU mL(-1). These results show the utility of liquefied bagasse as a culture medium for enzyme production in submerged fermentations. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 11/23807-1 - Development and evaluation of the operational conditions of bioreactors for production of biotechnological products
• Grantee: Alberto Colli Badino Junior
• Support Opportunities: Regular Research Grants