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l- Lactic acid production by Bacillus coagulans through simultaneous saccharification and fermentation of lignocellulosic corncob residue
- Jiang, Shan, Xu, Ping, Tao, Fei
- Bioresource technology reports 2019 v.6 pp. 131-137
- Bacillus coagulans, batch fermentation, biodegradability, cellulose, corn cobs, lignocellulose, lignocellulosic wastes, plastics, polylactic acid, saccharification
- l-Lactic acid is an important monomer of polylactic acid, a biodegradable plastic. In this study, we systematically investigated l-lactic acid fermentation by thermophilic Bacillus coagulans strains using the corncob residue (CCR), a widely available lignocellulosic material. Our results showed that 68.0 g/L l-lactic acid was obtained with a high yield of 0.85 g/g cellulose by B. coagulans strain H-1 after 36 h in batch fermentation. Strain H-1 could produce 79.1 g/L l-lactic acid with a yield of 0.76 g/g cellulose after 84 h in fed-batch fermentation. The results suggest that attractive lignocellulosic wastes such as CCR could be used in the efficient biomanufacture of l-lactic acid.