Fig. 6
Direct conversion of cassava to butanol in a bioreactor by Clostridium sp. strain BOH3. a With supplement of CaCO3 and l-tryptophan; b without supplement of CaCO3 and l-tryptophan (control). Experiments were conducted in triplicate in terms of robustness of culture BOH3, metabolites and cassava utilization rate, although the results for one fermentation are shown. Differences in product formation between the triplicates were less than 5 %