Low temperature pre-treatment of new cultivar of corn for ethanol production and nutrient value of its distiller’s dried grains with soluble |
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Authors: | Gi-wook Choi Yule Kim Keun Kim |
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Institution: | (1) Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, 207H Othmer Hall, Lincoln, NE 68588-0643, USA |
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Abstract: | The objective of this work was to evaluate the production of bioethanol from a new Korean variety of corn (Gangdaok) and to
assess low temperature pre-treatment of corn mashes before simultaneous saccharification and fermentation. Corn mashes containing
178 g/L of total sugar were fermented with Saccharomyces cerevisiae CHY 1011(KCTC 11250BP) at 35°C. Fermentation of mash supplemented with solid glucoamylase was completed within 48 h, and
the ethanol produced was 474.0 and 473.1 L/ton as dry base with low temperature pre-treatment and pressure pretreatment, respectively.
Furthermore, the DDGS of Gangdaok cultivar contained more essential amino acids (21.1 mg/g) than did Ambrosia cultivar (USA
corn), which is a widely used feedstock. In addition, there were no significant differences in ethanol yield or amino acid
concentration in DDGS between low temperature pre-treatment and pressure pretreatment. The results show that Gangdaok holds
potential economic advantages if applied to the bioethanol and feed industries. |
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Keywords: | |
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