Optimization of Clostridium beijerinckii semi-solid fermentation of rape straw to produce butyric acid by genome analysis

Bioresources and Bioprocessing

Table 5 Effects of scale-up and unsterilized fermentation on butyric acid production

Fermentation method	Fermentation scale (mL)	Butyric acid (g/L)
Sterilization fermentation	100	13.86 ± 0.77
	500	13.76 ± 0.53
	1000	13.66 ± 0.37
	2500	13.52 ± 0.87
Un-sterilized fermentation	100	13.80 ± 0.53
	500	13.74 ± 0.70
	1000	13.69 ± 0.46
	2500	13.42 ± 0.83