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Bioresour Technol. 2013 Mar;132:383-6. doi: 10.1016/j.biortech.2012.11.023. Epub 2012 Nov 23.

Efficient saccharification for non-treated cassava pulp by supplementation of Clostridium thermocellum cellulosome and Thermoanaerobacter brockii β-glucosidase.

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  • 1Nanotechnology and Biotechnology Division, Kasetsart Agricultural and Agro-Industrial Product Improvement Institute, Kasetsart University, 50, Ngamwongwan Rd., Bangkok 10900, Thailand. p_vaithanomsat@yahoo.com

Abstract

Cassava pulp containing 60% starch and 20% cellulose is a promising renewable source for bioethanol. The starch granule was observed to tightly bind cellulose fiber. To achieve an efficient degradation for cassava pulp, saccharification tests without pre-gelatinization treatment were carried out using combination of commercial α-amylase with cellulosome from Clostridium thermocellum S14 and β-glucosidase (rCglT) from Thermoanaerobacter brockii. The saccharification rate for cassava pulp was shown 59% of dry matter. To obtain maximum saccharification rate, glucoamylase (GA) from C. thermocellum S14 was supplemented to the combination. The result showed gradual increase in the saccharification rate to 74% (dry matter). Supplementation of GA to the combination of commercial α-amylase, cellulosome and rCglT is powerful method for efficient saccharification of cassava pulp without pretreatment.

Copyright © 2012 Elsevier Ltd. All rights reserved.

PMID:
23245453
[PubMed - indexed for MEDLINE]
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