Detoxification of sugarcane bagasse hydrolysate improves ethanol production by Candida shehatae NCIM 3501

Sugarcane bagasse hydrolysis with 2.5% (v/v) HCl yielded 30.29 g/L total reducing sugars along with various fermentation inhibitors such as furans, phenolics and acetic acid. The acid hydrolysate when treated with anion exchange resin brought about maximum reduction in furans (63.4%) and total pheno...

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Bibliographic Details
Published in:Bioresource technology 2007-07, Vol.98 (10), p.1947-1950
Main Authors: Chandel, Anuj Kumar, Kapoor, Rajeev Kumar, Singh, Ajay, Kuhad, Ramesh Chander
Format: Article
Language:English
Subjects:
Acid hydrolysis
alcoholic fermentation
Biological and medical sciences
Candida - metabolism
Candida shehatae
Cellulose - chemistry
Cellulose - metabolism
Detoxification
Ethanol
Ethanol - metabolism
ethanol production
Fermentation
Food industries
Fundamental and applied biological sciences. Psychology
hydrolysates
Hydrolysis
Laccase
lignocellulose
Pichia stipitis
renewable energy sources
Saccharum - chemistry
Saccharum - metabolism
sugarcane bagasse
Use and upgrading of agricultural and food by-products. Biotechnology
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Summary:Sugarcane bagasse hydrolysis with 2.5% (v/v) HCl yielded 30.29 g/L total reducing sugars along with various fermentation inhibitors such as furans, phenolics and acetic acid. The acid hydrolysate when treated with anion exchange resin brought about maximum reduction in furans (63.4%) and total phenolics (75.8%). Treatment of hydrolysate with activated charcoal caused 38.7% and 57.5% reduction in furans and total phenolics, respectively. Laccase reduced total phenolics (77.5%) without affecting furans and acetic acid content in the hydrolysate. Fermentation of these hydrolysates with Candida shehatae NCIM 3501 showed maximum ethanol yield (0.48 g/g) from ion exchange treated hydrolysate, followed by activated charcoal (0.42 g/g), laccase (0.37 g/g), overliming (0.30 g/g) and neutralized hydrolysate (0.22 g/g).
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2006.07.047