Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/13505
Title: Bioethanol fermentation from untreated and pretreated lignocellulosic wheat straw using fungi <i style="">Fusarium oxysporum</i>
Authors: Hossain, Sk Masud
Anantharaman, N
Das, Manas
Keywords: Biofuel
Ethanol
Fermentation
Saccharification
Wheat Straw
Issue Date: Jan-2012
Publisher: NISCAIR-CSIR, India
Abstract: A comparison has been made among untreated, lime pretreated and dilute alkaline peroxide pretreated wheat straw for bioethanol production by simultaneous saccharification and fermentation (SSF) process in a continuous stirred batch bioreactor (CSBR) using fungi <i>Fusarium oxysporum</i>. The optimum parameters used for the bioethanol fermentation are: time 48 h, <i style="">p</i>H 6, temperature 50, stirring speed 35, and wheat straw loading 35 g/L. Maximum yield of ethanol is found to be 0.756 , 0.796 and 0.810 g/g of wheat straw under optimum conditions for untreated, lime pretreated and dilute alkaline peroxide<i style=""> </i>pretreated<i style=""> </i>wheat straw. The sp. fungal growth rate is found to be 5.26 , 5.40, and 5.88 s<sup>−1 </sup>and maximum sp. fungal growth rate is 10.52, 10.80 and 11.76 s<sup>−1 </sup>using the Monod model for the fermentation of untreated, lime pretreated and dilute alkaline peroxide<i style=""> </i>pretreated wheat straw under optimum conditions respectively. The fungal growth kinetic parameters are 33.6 , 33.9 and 34.7 g/L respectively for fermentation of the three samples under the optimum conditions. The sp. carboxy methyl cellulase ( <i style="">CMCase</i>)<i style=""> </i>activity are 1185<sup> </sup>, 1455 and 1545<sup> </sup>min<sup>−1 </sup>and maximum sp. <i style="">CMCase </i>activity are 2370, 2910 and 1545<sup> </sup>min<sup>−1 </sup>using Michaelis-Menten enzyme kinetic model for the fermentation of three samples respectively under optimum conditions. The <i style="">CMCase</i> enzyme kinetic parameters are 34.3, 34.5 and 34.7 g/L for the three samples respectively under optimum fermentation conditions. Fungi <i>Aspergillus oryzae</i> show the better conversion of ethanol than fungi <i style="">Fusarium oxysporum. </i>The fermentation process follows the first order rate equation in CSBR.
Description: 63-70
URI: http://hdl.handle.net/123456789/13505
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.19(1) [January 2012]

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