Repeated batches as a strategy for high 2G ethanol production from undetoxified hemicellulose hydrolysate using immobilized cells of recombinant Saccharomyces cerevisiae in a fixed-bed reactor

Table 3 Fermentation performance of encapsulated T18 using undetoxified hemicellulose hydrolysate in mini reactors and fixed-bed bioreactor

Batch	Recirculation			No recirculation			Mini reactors
Batch	1	2	3	1	2	3	1	2	3
Y_P/S (g/g)	0.38	0.32	0.35	0.34	0.32	0.35	0.37	0.31	0.38
Q_P (g/L/h)	5.7	3.9	2.5	4.6	3.5	2.9	5.0	4.3	3.3
q_P (mg_ethanol/g_drycells/h)	114	78	50	92	70	58	100	86	66
Final conversion (%)	98.3	96.9	97.4	97.5	96.9	97.3	95.3	95.9	95.0

Fermentation performance of encapsulated T18 using undetoxified hemicellulose hydrolysate in repeated batches in mini reactors and in fixed-bed bioreactor with and without medium recirculation (DO₀ = 100, 50 g_cell/L, 35 °C and pH 5.2). Y_P/S is gram of ethanol produced per gram of fermentable sugars consumed, Q_P is ethanol productivity and q_p is the specific ethanol productivity

ISSN: 2731-3654