Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 1/27/2005
Publication Date: 2/19/2005
Citation: Corredor, D., Bean, S., Schober, T., Wang, D. 2005. Effect of decorticated sorghum on ethanol production and chemical composition of DDGS. Proceedings of the 24th Biennial Grain Sorghum Research & Utilization Conference. Meeting Abstract. p. 33. Interpretive Summary:
Technical Abstract: The use of renewable biomass that contains considerable amounts of starch and cellulose could provide the sugar platform for numerous bioproducts. Pretreatment technologies have been developed to increase bioconversion rate for both starch and cellulosic based biomass. This study investigated the effect of decortication process as pretreatment method on ethanol production and DDGS quality. Eight sorghum varieties with 0, 10, and 20% of outer layer removal were used as raw materials for ethanol production. The decorticated samples were further liquefied, saccharified, and fermented to ethanol by using Saccharomyces cerevisiae. Removal of germ and fiber prior to fermentation allowed higher starch loading for ethanol fermentation and resulted in increased ethanol production. The ethanol yields increased as the percentage of decortication increased. The decortication process resulted in DDGS with high protein contents and low fiber contents, which may improve the feed quality.