Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7079572 | Bioresource Technology | 2014 | 8 Pages |
Abstract
The effect of osmotic pressure on erythritol and mannitol production by an osmophilic yeast strain of Yarrowia lipolytica CICC 1675 using glycerol as the sole carbon source was investigated. Appropriately high osmotic pressure was found to enhance erythritol production and inhibit mannitol formation. A novel two-stage osmotic pressure control fed-batch strategy based on the kinetic analysis was developed for higher erythritol yield and productivity. During the first 96Â h, the osmotic pressure was maintained at 4.25Â osmol/kg by feeding glycerol to reduce the inhibition of cell growth. After 132Â h, the osmotic pressure was controlled at 4.94Â osmol/kg to maintain a high dpery/dt. Maximum erythritol yield of 194.3Â g/L was obtained with 0.95Â g/L/h productivity, which were 25.7% and 2.2%, respectively, improvement over the best results in one-stage fed-batch fermentation. This is the first report that a novel osmotic pressure control fed-batch strategy significantly enhanced erythritol production.
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Physical Sciences and Engineering
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Authors
Li-Bo Yang, Xiao-Bei Zhan, Zhi-Yong Zheng, Jian-Rong Wu, Min-Jie Gao, Chi-Chung Lin,