Process optimization for ethanol production from photoperiod-sensitive sorghum: Focus on cellulose conversion

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dc.contributor.author Xu, Feng
dc.contributor.author Theerarattananoon, Karnnalin
dc.contributor.author Wu, Xiaorong
dc.contributor.author Pena, Leidy
dc.contributor.author Shi, Yong-Cheng
dc.contributor.author Staggenborg, Scott A.
dc.contributor.author Wang, Donghai
dc.date.accessioned 2011-10-13T14:13:27Z
dc.date.available 2011-10-13T14:13:27Z
dc.date.issued 2011-10-13
dc.identifier.uri http://hdl.handle.net/2097/12367
dc.description.abstract Photoperiod-sensitive sorghum, as a competitive biomass for ethanol production, was investigated to develop an integrated process for improving ethanol yield. Response surface methodology was employed to study the relationship between pretreatment variables (including temperature, sulfuric acid concentration, and reaction time) and cellulose recovery, as well as efficiency of enzymatic hydrolysis (EEH) in the solid part. Recovery yield decreased and EEH increased as the pretreatment temperature, acidic concentration, and reaction time increased. A model was successfully developed to predict total glucose yield with a maximum value of 82.2%. Conditions of co-fermentation were also optimized, and the optimal ethanol yield was obtained with constant-temperature simultaneous saccharification and fermentation at 38°C. Acetate buffer at a concentration of 50 mM was found helpful for increasing efficiency of enzymatic hydrolysis as well as ethanol yield. The maximum ethanol yield was 0.21 g ethanol per dry mass at the conditions of 38°C, 0.05 g yeast/L, and 50 mM acetate buffer. A complete cellulose balance was provided for the whole process. en_US
dc.relation.uri http://www.sciencedirect.com/science/article/pii/S0926669011001221 en_US
dc.subject Photoperiod-sensitive sorghum en_US
dc.subject Ethanol en_US
dc.subject Response surface methodology en_US
dc.subject Sulfuric acid pretreatment en_US
dc.subject Fermentation en_US
dc.title Process optimization for ethanol production from photoperiod-sensitive sorghum: Focus on cellulose conversion en_US
dc.type Article (author version) en_US
dc.date.published 2011 en_US
dc.citation.doi doi:10.1016/j.indcrop.2011.04.012 en_US
dc.citation.epage 1218 en_US
dc.citation.issue 1 en_US
dc.citation.jtitle Industrial Crops and Products en_US
dc.citation.spage 1212 en_US
dc.citation.volume 34 en_US
dc.contributor.authoreid fxu en_US
dc.contributor.authoreid theerar en_US
dc.contributor.authoreid xwu3786 en_US
dc.contributor.authoreid lpena en_US
dc.contributor.authoreid ycshi en_US
dc.contributor.authoreid sstaggen en_US
dc.contributor.authoreid dwang en_US

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