Mycobiology

The Korean Society of Mycology (한국균학회)
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Improved Bioethanol Production Using Activated Carbon-treated Acid Hydrolysate from Corn Hull in Pachysolen tannophilus

  • Seo, Hyeon-Beom (Division of Food and Biotechnology, Chungju National University) ;
  • Kim, Seung-Seop (Division of Biomaterials Engineering, Kangwon National University) ;
  • Lee, Hyeon-Yong (Division of Biomaterials Engineering, Research Institute of Bioscience and Biotechnology, Kangwon National University) ;
  • Jung, Kyung-Hwan (Division of Food and Biotechnology, Chungju National University)
  • Published : 2009.06.30
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Abstract

To optimally convert corn hull, a byproduct from corn processing, into bioethanol using Pachysolen tannophlius, we investigated the optimal conditions for hydrolysis and removal of toxic substances in the hydrolysate via activated carbon treatment as well as the effects of this detoxification process on the kinetic parameters of bioethanol production. Maximum monosaccharide concentrations were obtained in hydrolysates in which 20 g of corn hull was hydrolyzed in 4% (v/v) $H_2SO_4$. Activated carbon treatment removed 92.3% of phenolic compounds from the hydrolysate. When untreated hydrolysate was used, the monosaccharides were not completely consumed, even at 480 h of culture. When activated carbon.treated hydrolysate was used, the monosaccharides were mostly consumed at 192 h of culture. In particular, when activated carbon-treated hydrolysate was used, bioethanol productivity (P) and specific bioethanol production rate ($Q_p$) were 2.4 times and 3.4 times greater, respectively, compared to untreated hydrolysate. This was due to sustained bioethanol production during the period of xylose/arabinose utilization, which occurred only when activated carbon-treated hydrolysate was used.

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References

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