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KMID : 1160220090370020133
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Mycobiology
2009 Volume.37 No. 2 p.133 ~ p.140
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Improved Bioethanol Production Using Activated Carbon-treated Acid Hydrolysate from Corn Hull in Pachysolen tannophilus
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Seo Hyeon-Beom
Kim Seung-Seop
Lee Hyeon-Yong
Jung Kyung-Hwan
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Abstract
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To optimally convert corn hull, a byproduct from corn processing, into bioethanol using Pachysolen tannophlius, we investigatedthe optimal conditions for hydrolysis and removal of toxic substances in the hydrolysate via activated carbon treatmentas well as the effects of this detoxification process on the kinetic parameters of bioethanol production. Maximummonosaccharide concentrations were obtained in hydrolysates in which 20 g of corn hull was hydrolyzed in 4% (v/v) H2SO4. Activated carbon treatment removed 92.3% of phenolic compounds from the hydrolysate. When untreated hydrolysate wasused, the monosaccharides were not completely consumed, even at 480 h of culture. When activated carbon?treated hydrolysatewas used, the monosaccharides were mostly consumed at 192 h of culture. In particular, when activated carbon-treatedhydrolysate was used, bioethanol productivity (P) and specific bioethanol production rate (Qp) were 2.4 times and 3.4 timesgreater, respectively, compared to untreated hydrolysate. This was due to sustained bioethanol production during the periodof xylose/arabinose utilization, which occurred only when activated carbon-treated hydrolysate was used.
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KEYWORD
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Acid hydrolysis, Activated-carbon treatment, Bioethanol, Corn hull, Pachysolen tannophilus
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