Direct fermentation of sweet sorghum juice by Clostridium acetobutylicum and Clostridium tetanomorphum to produce bio-butanol and organic acids

Biofuel Research Journal

B. Ndaba¹  S. Marx¹  I. Chiyanzu¹ 

[1] School of Chemical and Minerals Engineering, North-West University (Potchefstroom Campus), Potchefstroom, South Africa.;

关键词: Bio-butanol;    Clostridium species;    Fermentation;    Organic acids;    Sweet sorghum juice;   

DOI  :  

来源: DOAJ

【 摘 要 】

Single- and co-culture clostridial fermentation was conducted to obtain organic alcohols and acids from sweet sorghum juice as a low cost feedstock. Different inoculum concentrations of single cultures (3, 5, 10 v/v %) as well as different ratios of C. acetobutylicum to C. tetanomorphum (3:10, 10:3, 6.5:6.5, 3:3, and 10:10 v/v %, respectively) were utilized for the fermentation. The maximum butanol concentration of 6.49 g/L was obtained after 96 h fermentation with 10 % v/v C. acetobutylicum as a single culture. The fermentation with 10% v/v C. tetanomorphum resulted in more than 5 g/l butyric acid production. Major organic acid concentration (lactic acid) of 2.7 g/L was produced when an inoculum ratio of 6.5: 6.5 %v/v C. acetobutylicum to C. tetanomorphum was used.

【 授权许可】

Unknown