MEMBRANE EXTRACTIVE BUTANOL PRODUCTION BY IMMOBILIZED Clostridium beijerinckii NCIMB 8052
- MEMBRANE EXTRACTIVE BUTANOL PRODUCTION BY IMMOBILIZED Clostridium beijerinckii NCIMB 8052
- 조민옥; 이선미; 원기훈; 엄영순; 상병인
- butanol production; Clostridium beijerinckii NCIMB 8052; liquid-liquid extraction; oleyl alcohol
- Issue Date
- Bioenergy II
- Biobutanol has many characteristics that make it a better biofuel than bioethanol, now used in the formulation of gasohol. Despite the remarkable advantages of butanol as a fuel, biobutanol production has several limitations, including low values for the yield, productivity, and final product concentration. In this study, we examined the effect of liquid-liquid extraction for the in-situ removal of butanol from fed-batch fermentation broth using Clostridium beijerinckii NCIMB 8052. The production of butanol was stably maintained at 3~4 g/L in the medium during a operation with the liquid-liquid fermentation of butanol. Oleyl alcohol was found to be an efficient solvent for butanol extraction from the culture broth. Continuous extraction of butanol was successfully performed with the liquid-liquid extraction by which direct contact between the solvent and cells. This study showed that butanol productivity and yield can be improved in an integrated process of butanol fermentation with in-situ extraction by maintaining butanol concentration below butanol toxic levels.
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