作    者：付永前,尹龙飞,蒋茹,朱华跃,阮奇城
影响因子：0 (EI)
刊物名称：Advances in Applied Biotechnology
出版年卷：330743_1_En:240-243

文章摘要：The effects of exogenous calcium on fungal pellet morphology during preculture and L-lactic acid production were studied. The results showed that addition of exogenous calcium could induce pellet formation. The diameter of the pellet increased with increasing concentration of exogenous calcium, including CaCl2 and CaCO3. The smaller pellet precultured with low concentration of soluble calcium (CaCl2) was beneficial for L-lactic acid production because the pellet was dense and the large inner part of the pellet was inactive. By contrast, the larger pellet precultured with high concentration of insoluble calcium (CaCO3), except 8.0 g/L CaCO3, was beneficial for L-lactic acid production. Supported by the CaCO3 powder, the entire biomass layer was fully active, and the highest L-lactic acid productivities of 1.22 g/L h and 58.6 g/L L-lactic acid were reached using the 1.5 mm pellet.

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