Table 2.

Acetoin production from APC by strain IPE5-4-UD-4 through different processes

Fermentation process	Fermentation time (h)	Acetoin
		Maximum concentration (g L−1)	Yielda (g g−1)	Productivityb (g L−1 h−1)	CAcetoin/CcAPC
Shake flask SSF	72	12.55 ± 0.28	0.25	0.17	0.46 ± 0.01
Shake flask SHF	72	10.89 ± 0.34	0.22	0.15	0.42 ± 0.01
Fermenter SSF	60	22.76 ± 1.16	0.46	0.38	0.72 ± 0.04

^aAcetoin yield was calculated by g acetoin/g substrate

^bAcetoin productivity was calculated by maximum concentration of acetoin (g L⁻¹)/fermentation time (h)

^cC_Acetoin meant the molar concentration of carbon in acetoin, and C_APC meant the molar concentration of carbon in APC