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KMID : 1094720090140040496
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Biotechnology and Bioprocess Engineering
2009 Volume.14 No. 4 p.496 ~ p.502
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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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Choi Gi-Wook
Kim Yule
Kim Keun
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Abstract
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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 pre-treatment, 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 pre-treatment. The results show that Gangdaok holds potential economic advantages if applied to the bioethanol and feed industries.
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KEYWORD
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bioethanol, new variety of corn, low temperature pre-treatment, amino acid contents of DDGS
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