Comparative analysis of stirred catalytic basket bio-reactor for the production of bio-ethanol using free and immobilized Saccharomyces cerevisiae cells

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Table 1 Ethanol yield and glucose consumption time by free and immobilized cells in Alginate beads and sponges

Immobilization method	Stirrer (rpm)	Glucose conc. (g l)	Ethanol productivity (g l⁻¹ h)	Ethanol yield glucose (g g⁻¹)	Volumetric ethanol yield (g l⁻¹)	Glucose consumption time (h)
Free cells	200	200	1.68	0.15	49	29
Alginate	200	200	1.47	0.195	34	23
Sponge	200	200	4.29	0.285	72	17
Free cells	500	200	2.45	0.24	50	20
Alginate	500	200	11.28	0.35	79	7
Sponge	500	200	10.40	0.405	83	8