Optimization of Initial Cation Concentrations for L-Lactic Acid Production from Fructose by Lactobacillus pentosus Cells


In this study, Box-Behnken design was applied to optimize the initial concentrations of 4 cations for L-lactic acid production from fructose by homologous batch fermentation of Lactobacillus pentosus cells. The optimum initial cation concentrations were obtained as 6.542 mM Mg2+, 3.765 mM Mn2+, 2.397 mM Cu2+, and 3.912 mM Fe2+, respectively. The highest L-lactic acid yield and productivity were obtained as 0.935 ± 0.005 g/g fructose and 1.363 ± 0.021 g/(L × h), respectively, with a maximum biomass concentration of 7.97 ± 0.17 g/L. The effectiveness of the optimization by Box-Behnken design was confirmed based on the small errors between predicted results and experimental results shown as 0.3%, − 0.2%, and − 1.2%, respectively. The quadratic models with high accuracy and reliability can be applied to mathematically forecasted the fermentation performance. After the optimization, the lactic acid yield and productivity were significantly improved by 3.7% and 21.0%, respectively.

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Data Availability

All data and materials are available.



Analysis of variance


American Type Culture Collection


Design of experiment




Lactic acid


Lactic acid bacteria


de Man, Rogosa and Sharpe


Proton nuclear magnetic resonance


Optical density




Pentose phosphoketolase


Polylactic acid


Response surface methodology


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Jianfei Wang, Shaoming Jiang, and Shijie Liu are the primary contributors of this work. Jiaqi Huang and Huanyu Guo provided important technical support for experiments and manuscript preparation. Xudong Bi, Maolin Hou, Xingyu Chen, Shibo Hou, Hebei Lin, Yuming Lu, Hujie Lv, Jinyue Qiao, and Ruiyi Yang participated in this study and supported in the manuscript preparation.

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Wang, J., Jiang, S., Huang, J. et al. Optimization of Initial Cation Concentrations for L-Lactic Acid Production from Fructose by Lactobacillus pentosus Cells. Appl Biochem Biotechnol (2021). https://doi.org/10.1007/s12010-021-03492-1

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  • Lactobacillus pentosus
  • Optimization
  • Cation concentrations
  • L-lactic acid