Table 4 Maximum specific growth rate (μ), yields (Y) of glycerol, biomass and ethanol on glucose and the ratios of glycerol and acetate formation to biomass formation in anaerobic bioreactor batch cultures of S. cerevisiae strains IMX585, IMX705, IMX899 and IMX756

Relevant genotype

GND1 GND2

gnd2Δ gnd1::gndA

GND1 GND2 ald6Δ

gnd2Δ gnd1::gndA ald6Δ

μ (h⁻¹)

0.32 ± 0.00

0.30 ± 0.01

0.29 ± 0.01

0.26 ± 0.01

Y glycerol/glucose (g g⁻¹)

0.105 ± 0.000

0.121 ± 0.001

0.106 ± 0.000

0.146 ± 0.000

Y biomass/glucose (g_x g⁻¹)

0.094 ± 0.004

0.087 ± 0.002

0.088 ± 0.001

0.083 ± 0.002

Y EtOH/glucose (g g⁻¹)

0.372 ± 0.001

0.379 ± 0.001

0.386 ± 0.000

0.374 ± 0.002

Ratio glycerol formed/biomass (mmol g ⁻¹_x )

12.19 ± 0.44

15.14 ± 0.22

12.83 ± 0.39

18.90 ± 0.56

Ratio acetate formed/biomass (mmol g ⁻¹_x )

1.50 ± 0.03

1.63 ± 0.02

<0.05

<0.05