NDLI: Grain sorghum is a viable feedstock for ethanol production

Content Provider	Springer Nature Link
Author	Wang, D. Bean, S. McLaren, J. Seib, P. Madl, R. Tuinstra, M. Shi, Y. Lenz, M. Wu, X. Zhao, R.
Copyright Year	2008
Abstract	Sorghum is a major cereal crop in the USA. However, sorghum has been underutilized as a renewable feedstock for bioenergy. The goal of this research was to improve the bioconversion efficiency for biofuels and biobased products from processed sorghum. The main focus was to understand the relationship among “genetics–structure–function–conversion” and the key factors impacting ethanol production, as well as to develop an energy life cycle analysis model (ELCAM) to quantify and prioritize the saving potential from factors identified in this research. Genetic lines with extremely high and low ethanol fermentation efficiency and some specific attributes that may be manipulated to improve the bioconversion rate of sorghum were identified. In general, ethanol yield increased as starch content increased. However, no linear relationship between starch content and fermentation efficiency was found. Key factors affecting the ethanol fermentation efficiency of sorghum include protein digestibility, level of extractable proteins, protein and starch interaction, mash viscosity, amount of phenolic compounds, ratio of amylose to amylopectin, and formation of amylose-lipid complexes in the mash. A platform ELCAM with a base case showed a positive net energy value (NEV) = 25,500 Btu/gal EtOH. ELCAM cases were used to identify factors that most impact sorghum use. For example, a yield increase of 40 bu/ac resulted in NEV increasing from 7 million to 12 million Btu/ac. An 8% increase in starch provided an incremental 1.2 million Btu/ac.
Starting Page	313
Ending Page	320
Page Count	8
File Format	PDF
ISSN	13675435
Journal	Journal of Industrial Microbiology and Biotechnology
Volume Number	35
Issue Number	5
e-ISSN	14765535
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2008-01-23
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Grain composition Sorghum Bioconversion Bioprocess Ethanol Fermentation efficiency Energy life-cycle analysis Microbiology Biochemistry Inorganic Chemistry Genetic Engineering Biotechnology Bioinformatics
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Applied Microbiology and Biotechnology Biotechnology

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