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1,3-Propanediol production by a newly isolated strain, Clostridium perfringens GYL.
Bioresource Technology 2017 June
1,3-Propanediol (1,3-PD), a valuable bulk industrial material, has attracted increasing interest in recent years. A novel strain GYL isolated from soil samples could efficiently convert glycerol to 1,3-PD anaerobically. The physiological and biochemical characteristics of strain GYL were determined, indicating that strain GYL is a member of Clostridium perfringens with the neighbor-joining method of 16S rRNA gene sequences. The fermentation properties of strain GYL were also investigated systematically, which showed that the strain has a fast growth speed and high tolerance to 200g/L glycerol. Batch fermentation was carried out at a high glycerol concentration of 100g/L, and strain GYL produced 36.7g/L 1,3-PD. In fed-batch fermentation, strain GYL showed a maximum productivity of 2.0g/(L·h), and produced 40.0g/L 1,3-PD, with a high yield of 0.68mol 1,3-PD/mol glycerol. This study shows that the newly isolated strain GYL may have potential for 1,3-PD production from glycerol.
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