Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 6/20/2003
Publication Date: 9/18/2003
Citation: Zhan, X., Wang, D., Bean, S. 2003. Ethanol and lactic acid production from extrusion cooked grain sorghum. Abstract No. 329 in: 2003 AACC Annual Meeting Program Book. p.138. Meeting Abstract. Interpretive Summary: Abstract for AACC Annual Meeting to be held September 28 - October 2, 2003, in Portland, OR
Technical Abstract: The production of chemicals and biomaterials from renewable biomass faces significant technical and economic challenges at present. Its success depends largely on physical and chemical properties of the biomass, pretreatment procedures, efficient microorganisms, and processing conditions. Grain sorghum is a starch-rich grain similar to corn. U. S. is number one in sorghum production in the world. However, grain sorghum has been underused for industrial applications. The objective of this research is to improve ethanol and lactic acid production by extrusion technology. Both normal and supercritical extrusions were used to increase bioconversion rate and final product yields. Ethanol yield from normal and supercritical extrusion cooked grain sorghum were about 3% and 6% higher than conventional cooked grain sorghum, respectively. Lactic acid production from normal and supercritical extrusion-cooked grain sorghum was 16 to 26% higher than that from conventionally cooked grain sorghum for substrate concentrations of 5 to 15%.