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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2005.12
- 수록면
- 408 - 412 (5page)
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초록· 키워드
In a previous research, it has been found that it could be possible to increase the partial pressure of hydrogen and hydrogen yield by scavenging the CO₂ from the headspace of reactor. In this research, the positive and negative effects of the CO₂ scavenging especially on the fate of by-products were investigated by a batch experiment. Production and conversion of by-products had critical relationships with hydrogen evolution and consumption. The maximum hydrogen fraction in the headspace was increased from 66.4 to 91.2% by removing the CO₂ in the headspace and the degradation rate of glucose was also enhanced. The removal of CO₂ effectively hindered the homoacetogenesis but caused several negative phenomena. The degradation of ethanol, one of the main products, was inhibited by the high partial pressure of hydrogen and/or the absence of CO₂. Also it was observed that other by-products such as propionate, propanol, acetone, etc. could not be degraded further after produced from glucose. On the other hand, solventogenesis was not observed in spite of the high hydrogen partial pressure apart from previous researches and it might hinder the excess production of acetate, which could cause overall inhibition. From this research, it could be implicated that the CO₂ scavenging method could be recommended if the fermentation was purposed to produce hydrogen and ethanol.
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