Controlled-ph batch butanol-acetone fermentation by low acid producingClostridium acetobutylicumB18

✍ Scribed by Qinghuang Geng; Chang-Ho Park

• Publisher: Springer Netherlands
• Year: 1993
• Tongue: English
• Weight: 360 KB
• Volume: 15
• Category: Article
• ISSN: 0141-5492
• DOI: 10.1007/bf00128288

✦ Synopsis

C. acetobutylicum B18 produced a large amount of butanol over a wide range of pH (4.5-6.0). At pH 6.0 fermentation and cell growth were most active at pH 6.0, and the highest values of glucose consumption rate (4.37 g/L-h), butanol productivity (1.0 g/L-h), butyric acid recycle rate (0.31 g/L-h), and cell growth rate (0.2 h "l) were obtained. There existed a critical pH between 6.0 an~d 6.5 above which cells switched to organic acid producing mode. Clostridial stage appeared essential for solvent production by strain B18 but sporulation was not necessary for solvent formation.