Effects of Fermentation Temperature and Aeration on Production of Natural Isoamyl Acetate by Williopsis saturnus var. saturnus

Table 3

Effect of aeration on isoamyl acetate concentration, production rate, and specific productivity.

Aeration	Isoamyl acetate; (mg L^−1)	Isoamyl acetate production rate^x; (mg L^−1 h^−1)	Isoamyl acetate specific productivity^x; (mg L^−1 cell^−1 h^−1)	Isoamyl acetate/total amyl alcohol ratio^x
Aerobic	8.84 ± 0.08^c	0.082 ± 0.0005^c	0.0037 ± 0.0003^c	1.71 ± 0.32^cy
Anaerobic	20.72 ± 0.02^b	0.432 ± 0.0004^b	0.0276 ± 0.0011^b	0.77 ± 0.02^b
Semiaerobic	118.05 ± 5.59^a	0.703 ± 0.0333^a	0.0297 ± 0.0009^a	1.37 ± 0.60^a
Level of significance	*	*	*	*

xIsoamyl acetate production rate, specific productivity, and ester/higher alcohol ratio were at times when isoamyl acetate concentration reach the maximum. ^yDifferent letters in the same column indicate significant difference (𝑃≤0.05). *: 𝑃≤0.001.