지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 1998.8
- 수록면
- 345 - 352 (8page)
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초록· 키워드
오류제보하기
Wood chips of Korean Quercus sp. was steam exploded with the addition of 0.2% sulfuric acid at 215℃ for 3 to 6 minutes, and subsequently was hydrolyzed by Celluclast™ (and Novozym 188™) to produce hydrolysates contaning sugars. The hydrolysates with 3 to 5%(w/v) glucose (at maximum 8%) was not adequate for fermentation concerning subsequent ethanol recovery by distillation. Hence, it was concentrated at maximum 70°C temperature by vacuum evaporation to higher than 14% glucose concentration.
However, because of certain inhibitory materials probably produced during the explosion, hydrolysis and sterilization, hydrolysates containing higher than 80g/L glucose was not fermented properly. Yeast strain adaptation to concentrated hydrolysates, detoxification treatment with charcoal and lime were tested for improved fermentation to find some limited effects, and the charcoal treatment was found to be the most effective one. Surprisingly, sterilization at below 60℃ temperature for 2 hours instead of conventional 120℃, 15 minutes make the hydrolysates fermentation possible up to 140 g/L glucose concentration. Hence, it is assumed that certain toxic materials are produced additionally during the sterilization of concentrated hydrolysates.
The inhibitory effects of toxic materials produced during pretreatment and sterilization including lignin and sugar degradation products (such as vanillin, p-hydroxy bezaldehyde, syringaldehyde and furfural) were tested to identify those which could be prohibitive. It was found that the lignin degradation products are more toxic than sugar degradation products.
However, because of certain inhibitory materials probably produced during the explosion, hydrolysis and sterilization, hydrolysates containing higher than 80g/L glucose was not fermented properly. Yeast strain adaptation to concentrated hydrolysates, detoxification treatment with charcoal and lime were tested for improved fermentation to find some limited effects, and the charcoal treatment was found to be the most effective one. Surprisingly, sterilization at below 60℃ temperature for 2 hours instead of conventional 120℃, 15 minutes make the hydrolysates fermentation possible up to 140 g/L glucose concentration. Hence, it is assumed that certain toxic materials are produced additionally during the sterilization of concentrated hydrolysates.
The inhibitory effects of toxic materials produced during pretreatment and sterilization including lignin and sugar degradation products (such as vanillin, p-hydroxy bezaldehyde, syringaldehyde and furfural) were tested to identify those which could be prohibitive. It was found that the lignin degradation products are more toxic than sugar degradation products.
목차
Abstract
1. 서론
2. 실험재료 및 방법
3. 결과 및 고찰
4. 감사
5. 참고문헌
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UCI(KEPA) : I410-ECN-0101-2009-563-018150935