| 论文题目: | Jerusalem artichoke powder: a useful material in producing high-optical-purity l-lactate using an efficient sugar-utilizing thermophilic Bacillus coagulans strain |
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| 作者: | Wang Limin, Xue Zhangwei, Zhao Bo, Yu Bo, Xu Ping, Ma Yanhe |
| 联系作者: | Yu Bo |
| 刊物名称: | Bioresource technology |
| 期: | |
| 卷: | 130 |
| 页: | 174-80 |
| 年份: | 2013 |
| 影响因子: | 5.352 |
| 论文下载: | 下载地址 |
| 摘要: | Jerusalem artichoke is a low-requirement crop, which does not interfere with food chain, and is a promising carbon source for industrial fermentation. Microbial conversion of such a renewable raw material to useful products, such as lactic acid, is an important objective in industrial biotechnology. In this study, high-optical-purity l-lactate was efficiently produced from the hydrolysates of Jerusalem artichoke powder by a thermophilic bacterium, Bacillus coagulans XZL4. High l-lactate production (134gl(-1)) was obtained using 267gl(-1) Jerusalem artichoke powder (total reducing sugars of 140gl(-1)) and 10gl(-1) of corn steep powder in fed-batch fermentation, with an average productivity of 2.5gl(-1)h(-1) and a yield of 0.96gg(-1) reducing sugars. The final product optical purity is 99%, which meets the requirement of lactic acid polymerization. Our study represents a cost-effective and promising method for polymer-grade l-lactate production using a cheap raw bio-resource. |
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