Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Ethanol Fermentation of Nafion-Catalyzed Hydrolyzates of Rice Straw by Pichia stipitis CBS 5776

볏짚의 Nafion 가수분해물에 대한 Pichia stipitis CBS 5776의 에탄올 발효

  • Chung, In-Sik (Department of Genetic Eng., Kyung Hee University) ;
  • Chun, Jae-Kun (Department of Food Technology, Seoul National University)
  • Published : 1994.10.31
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Abstract

Use of a solid superacid (Nafion) in hydrolysis of rice straw was investigated focusing on the fermentability of the hydrolyzates by Pichia stipitis CBS 5776. Comparisons were made with the hydrolyzates produced by a conventional method of sulfuric acid treatment. The Nafion-catalyzed hydrolyzates of rice straw exhibited low level of inhibition for both cell growth and fermentation in comparison to the hydrolyzates produced by sulfuric acid. Pichia stipitis cells were able to produce ethanol by fermentation of Nafion-catalyzed hydrolyzates when the inoculum level exceeded 3.2 g dry cells/l.

Pichia stipitis CBS 5776을 이용하여 볏짚 가수분해물의 fermentability를 조사하고 가수분해시 고체 강력산인 Nafion과 재래식 황산에 의한 가수분해물을 비교 검토하였다. 볏짚의 Nafion 가수분해물은 산 가수분해물보다 세포 증식 및 발효에 대한 저해 수준이 낮았으며 3.2 g/l 이상의 Pichia stipitis inoculum을 사용하면 Nafion 가수분해물의 발효에서 에탄올 생산이 가능하였다.

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