Thin stillage is a liquid by-product of ethanol fermentation and contains various organic materials such as glycerol and lactic acid. Using thin stillage for butanol production, C. pasteurianum produced 6.2-7.2 g/L of butanol using 20 g/L of glycerol as the main carbon source at the initial pH of 4.9-6.9. Lactic acid in thin stillage acted as a buffering agent, maintaining the pH of the medium in the range of 5.7-6.5. Butanol yields were in the range of 0.31-0.44 g of butanol/g of glycerol and generally higher than those obtained with the thin stillage containing no lactic acid or a synthetic medium containing glycerol as the sole carbon source. These results demonstrate that thin stillage can be used for efficient butanol production without the addition of supplementary nutrients and continuous pH control.
키워드
butanolstillagefermentation
저자
Jae-Hyung AHN [ Center for Environment Technology Research, Korea Institute of Science and Technology, Seoul, Korea. ]
Byoung-In SANG [ Center for Environment Technology Research, Korea Institute of Science and Technology, Seoul, Korea. ]
Youngsoon UM [ Center for Environment Technology Research, Korea Institute of Science and Technology, Seoul, Korea. ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
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