Effects of feedstock and co-culture of Lactobacillus fermentum and wild Saccharomyces cerevisiae strain during fuel ethanol fermentation by the industrial yeast strain PE-2

AMB Express

Table 1 Ethanol yield (%) and ethanol productivity (g L⁻¹ h⁻¹) of the fermentations carried out with the industrial S. cerevisiae yeast (PE-2) contaminated with the rough strain of S. cerevisiae (rough) and/or L. fermentum (Lf), in sugarcane juice (SCJ) or molasses (MOL) at 30 °C, in single and multiple-batch fermentations

Fermentation	Ethanol yield/productivity	Feedstock	Fermentation trials
Fermentation	Ethanol yield/productivity	Feedstock	PE-2	PE-2 + rough	PE-2 + Lf	PE-2 + rough + Lf
Single-batch fermentation^a	Yield (%)	SCJ	77.18 ± 11.18	49.86 ± 17.02	50.05 ± 11.75	51.26 ± 9.45
	Yield (%)	MOL	51.22 ± 8.47	55.03 ± 4.74	42.95 ± 9.77	55.83 ± 9.92
	Productivity (g L⁻¹ h⁻¹)	SCJ	1.71 ± 0.60	1.30 ± 0.22	1.17 ± 0.24	1.38 ± 0.33
	Productivity (g L⁻¹ h⁻¹)	MOL	1.13 ± 0.28	1.12 ± 0.21	1.05 ± 0.30	1.26 ± 0.26
Multiple-batch fermentation^b	Yield (%)	SCJ	87.78 ± 6.82	69.95 ± 22.79	67.67 ± 13.16	82.92 ± 9.57
	Yield (%)	MOL	83.30 ± 15.82	67.17 ± 18.94	80.85 ± 11.53	80.98 ± 3.93
	Productivity (g L⁻¹ h⁻¹)	SCJ	3.22 ± 1.23	2.57 ± 0.78	2.62 ± 1.02	3.18 ± 1.19
	Productivity (g L⁻¹ h⁻¹)	MOL	3.28 ± 1.09	3.03 ± 1.02	3.03 ± 0.97	2.83 ± 0.98