TABLE 1.

Fermentation data of cultures of C. beijerinckii grown on d-glucose, l-rhamnose, and on a d-glucose–l-rhamnose mixture

Substrate or product	d-Glucose (56 h)	l-Rhamnose (56 h)	d-Glucose/l-rhamnose (72 h)
Substrates at 0 h (mM)
d-Glucose	224.8		111.2
l-Rhamnose		243.4	129.3
Acetate	39.5	38.3	37.3
Substrates consumed at end (mM)
d-Glucose	215.3	NDa	111.2
l-Rhamnose		46.4	86.7
Acetateb	30.7	0	1.2
Products at end (mM)
Acetateb	8.8	57.5 (19.2b )	36.2
Lactate	7.5	ND	2.4
Butyrate	2.1	11.7	25.9
Acetone	3.2	ND	7.9
Isopropanol	68.5	ND	31.9
Ethanol	6	ND	1.1
Butanol	111.8	ND	59.4
1,2-Propanediol	ND	17.2	78.4
Propanol	ND	18.2	ND
Propionate	ND	7.8	ND
Biomass	26.6	2.1	11.7
Yields and recovery
Biomass (mol/mol of sugar)	0.12	0.045	0.059
Yield of butanol (mol/mol of d-glucose)	0.52		0.53
Yield of 1,2-propanediol (mol/mol of l-rhamnose)		0.37	0.904
Yield of propanol (mol/mol of l-rhamnose)		0.39
Yield of propionate (mol/mol of l-rhamnose)		0.17
Carbon recoveryc (%)	95	96	88
Electron recovery (%)	98	96	88

^aND, not detected.

^bAcetate was produced in l-rhamnose cultures.

^cThe release of CO₂ was estimated and included in the calculations.