원문정보
초록
영어
Biofuel is one of the promising energy sources that have potential to meet the need of sustainable and green energy systems. Butanol, one of the biofuels, has several advantages over ethanol for gasoline-alcohol blending due to its high energy content, miscibility, and low volatility. Butanol could also replace gasoline for current vehicle and engine technologies. Besides the usefulness of butanol as fuel, it has numerous applications in food, cosmetic, and chemical industries. In this study, butanol production by fermentation was performed with the most well-known butanol-producing microorganism, Clostridium acetobutylicum. To overcome the limitation of low productivity and yield in butanol fermentation, cells were immobilized by using media in a continuous membrane reactor. Glucose was fed with acetic acid, butyric acid, or both to investigate the effect of co-substrates on butanol production. As a result, butanol productivity and yield were enhanced by cell immobilization and optimizing concentrations of co-substrates. This study will provide a basis for the development of butanol production processes from various biomasses with high productivity and yield.