Simultaneous pretreatment and sacchariffication of rice husk by Phanerochete chrysosporium for improved production of reducing sugars

► We made an attempt to avoid SSF of fungal pretreatment. ► One direct step for pretreatment of the reducing sugar production. ► Fungal pretreatment resulted higher amount of reducing sugars on day 18 (895.9mg/2g of substrate). Phanerochete chrysosporium, the white-rot fungus, (a best source for lig...

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Bibliographic Details
Published in:Bioresource technology 2013-01, Vol.128, p.113-117
Main Authors: Potumarthi, Ravichandra, Baadhe, Rama Raju, Nayak, Priyanka, Jetty, Annapurna
Format: Article
Language:English
Subjects:
Biological
Biological and medical sciences
Biological pretreatment
Biomass
Biotechnology
Carbohydrate Metabolism - physiology
Enzymes
Ethanol - isolation & purification
Ethanol - metabolism
Food industries
Fundamental and applied biological sciences. Psychology
Fungi
Inhibitors
Lignolytic enzymes
Oryza - microbiology
Oxidation-Reduction
Phanerochaete - metabolism
Phanerochete chrysosporium
Polysaccharides - metabolism
Pretreatment
Reducing sugars
Rice
Rice husk
Seeds - microbiology
Sugars
Use and upgrading of agricultural and food by-products. Biotechnology
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Summary:► We made an attempt to avoid SSF of fungal pretreatment. ► One direct step for pretreatment of the reducing sugar production. ► Fungal pretreatment resulted higher amount of reducing sugars on day 18 (895.9mg/2g of substrate). Phanerochete chrysosporium, the white-rot fungus, (a best source for lignolytic enzymes system) was used in the biological pretreatment of rice husk for reducing sugars production. Usually reducing sugar production through biochemical process involves two steps: solid state fermentation (SSF) of fungal pretreatment for delignification, subsequently pretreated biomass subjected to enzymatic hydrolysis. During the fungal pretreatment of rice husk for reducing sugar production along with cellulase and xylanse, the activities of lignin degradation-related enzymes such as lignin peroxidases (LiP), GLOX (glyoxidase), and aryl alcohol oxidases (AAO), were observed. The fungal pretreated rice husk produced highest (895.9mg/ml/2g of rise husk) reducing sugars on 18th day of fungal treatment. This method may be good alternative to avoid operational costs associated with washing and the removal of inhibitors during the conventional pretreatment methods.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2012.10.030