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Effect of cultivar variation and Pichia stipitis NCIM 3498 on cellulosic ethanol production from rice straw

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Title Effect of cultivar variation and Pichia stipitis NCIM 3498 on cellulosic ethanol production from rice straw
Not Available
 
Creator K.R. Sheetal
S. Prasad
P.S. Renjith
 
Subject ethanol, rice straw, Pichia stipitis
 
Description Not Available
Lignocellulosic wastes such as rice straw gain importance in ensuring sustainable production of biofuels, being
one of the most abundant agricultural residues worldwide. This study points the need for characterization and
selection of substrate, optimizing the pretreatment method, as well as employing suitable fermenting organism,
which can be of immense help in the path towards a more efficient ethanol production process. Microwave assisted
alkali, acid, or water pretreated rice straw of five cultivars (PRH-10, Pusa Basmati 1121, Pusa 44, Taraori
basmati and IR-36) were subjected to enzymatic hydrolysis, followed by fermentation with Pichia stipitis 3498.
Saccharified hydrolysate of pretreated rice straw gave 4–5 times higher sugar recovery compared to untreated
straw. Total sugar recovery from different cultivars after pretreatment and saccharification ranged between 20
and 59%. Among the cultivars, Taraori basmati gave significantly higher sugar recovery and ethanol yield of
39.65%±3.70 and 5.16% respectively, through microwave/alkali pretreatment which was found best. Kinetic
studies done in biofermentor were able to produce the maximum yield of 6.63% (v/v) ethanol, equivalent to
92.9% of the theoretical yield, with an ethanol yield coefficient of 0.47gg⁠-1. This study confirmed the importance
of considering varietal differences of substrate, highlighted the higher efficiency of microwave/alkali pretreatment
in enhancing straw digestibility and also the potential of the strain P. stipitis 3498 for ethanol production
from lignocellulosic biomass.
Not Available
 
Date 2019-07-03T09:06:17Z
2019-07-03T09:06:17Z
2019-06-05
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/21093
 
Language English
 
Relation Not Available;
 
Publisher Elsevier