Table 2.

Ethanol concentration, yield and cell growth in aqueous medium after sucrose fermentation by free cells and immobilized cells ofSaccharomyces cerevisiae

	Free cells	Immobilized cells CABa	Immobilized cells CCCABb
Ethanol concentration (g L-1)	40	33.5 ± 4.6*	31.8 ± 6.9*
Yield (%)	74.3	64.5 ± 8.6*	62.1 ± 12.8*
Cell growth in aqueous medium (g L-1)	15.6	0.40 ± 0.38*	0.26 ± 0.30*

^a CAB: calcium alginate beads.

^b CCCAB: chitosan-covered calcium alginate beads.

^* Average data for eight successive fermentation cycles.