Dynamic simulation of continuous mixed sugar fermentation with increasing cell retention time for lactic acid production using Enterococcus mundtii QU 25

Table 2 Continuous l-lactic acid production by E. mundtii QU 25 using different sugar mixtures in feeding media (G100X60 or C100X60) at dilution rate of 0.2 h⁻¹

Mixed sugars^a	X^b	S^c_glu	S^d_cel	S^e_xyl	X/H^f ratios	S^g_la	S^h_aa	Yⁱ_la	P^j_la
Mixed sugars^a	g L⁻¹	g L⁻¹	g L⁻¹	g L⁻¹	X/H^f ratios	g L⁻¹	g L⁻¹	g g⁻¹	g L⁻¹ h
G100X60	1.99 ± 0.05	75.4 ± 1.5	–	57.7 ± 1.3	0.096	24.2 ± 1.8	0.151 ± 0.068	0.803	4.84
C100X60	2.42 ± 0.11	–	79.4 ± 1.7	49.7 ± 0.8	0.538	27.5 ± 0.5	0.383 ± 0.022	0.820	5.49
G100X60	2.06 ± 0.14	72.7 ± 1.0	–	57.6 ± 0.6	0.103	25.4 ± 1.3	0.134 ± 0.017	0.812	5.08

^aCompositions of fed medium, i.e., G100X60, 100 g L⁻¹ glucose and 60 g L⁻¹xylose; C100X60, 100 g L⁻¹ cellobiose and 60 g L⁻¹xylose; ^bcell concentration; ^ceffluent glucose concentration; ^deffluent cellobiose concentration; ^eeffluent xylose concentration; ^f the ratio of consumed xylose to consumed hexoses (glucose or cellobiose); ^glactic acid concentration; ^hacetic acid concentration; ⁱyield of lactic acid production; and ^jlactic acid productivity

ISSN: 2731-3654