earticle

영어

Nowadays, research effort is focused on looking for new and effective nutritional source and new progressive fermentation techniques enabling the achievement of both high substrate conversion and high production yields. In this study, bioethanol by-products were used as nutrients by Klebsiella oxytoca ATCC 43863 for the production of 2,3-butanediol (2,3-BDO), a promising bulk chemical which has potential applications in plastics, solvent, and anti-freeze solutions preparation. Bioethanol by-products were supplied from the commercial ethanol plant of Changhae Ethanol Co., Ltd, and solely used as fermentation medium without an addition of other ingredients. To evaluate the nutritional value of bioethanol by-products as fermentation medium, the total nitrogen, crude protein, and free amino acid were analysed and compared with a commercial yeast extract. K. oxytoca ATCC 43863 efficiently produced 2,3-BDO from these medium and increased the 2,3-BDO productivity and yield, compared to control medium containing 2 g/L yeast extract. Therefore, bioethanol by-products could be considered as an alternative fermentation medium for 2,3-BDO production.