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

Table 3 Effect of dilution rates on lactic acid production in CSFTR

	D^b	X^c	S^d_cel	S^e_xyl	X/C ratio^f	S^g_la	S^h_aa	Yⁱ_la	P^j_la
	h⁻¹	g L⁻¹	g L⁻¹	g L⁻¹	X/C ratio^f	g L⁻¹	g L⁻¹	g g⁻¹	g L⁻¹ h⁻¹
C100X60^a—CFSTR
D1	0.05	1.03 ± 0.01	86.6 ± 4.1	44.8 ± 1.4	0.980	25.5 ± 0.3	0.381 ± 0.080	0.887	1.28
D2	0.10	1.43 ± 0.01	82.5 ± 3.8	46.7 ± 2.2	0.671	24.1 ± 0.8	0	0.780	2.41
D3	0.15	2.53 ± 0.03	79.0 ± 1.1	48.1 ± 0.8	0.508	27.9 ± 0.7	0.260 ± 0.039	0.844	4.18
D4	0.20	2.57 ± 0.02	77.2 ± 3.7	50.3 ± 2.5	0.543	26.9 ± 1.2	0.201 ± 0.031	0.823	5.37
D5	0.25	1.74 ± 0.05	83.4 ± 1.9	48.2 ± 1.7	0.575	20.8 ± 0.9	0.116 ± 0.023	0.730	5.21
C50X30^a— CFSTR
D1	0.05	1.06 ± 0.03	29.3 ± 0.4	20.9 ± 0.4	0.441	32.7 ± 0.5	0.559 ± 0.018	1.09	1.64
D2	0.10	1.43 ± 0.05	28.1 ± 0.5	21.5 ± 0.5	0.412	27.1 ± 1.3	0.380 ± 0.043	0.881	2.71
D3	0.15	1.52 ± 0.08	30.9 ± 1.2	20.7 ± 0.7	0.465	22.1 ± 1.5	0.276 ± 0.058	0.770	3.31
D4	0.20	2.18 ± 0.16	31.3 ± 0.9	22.7 ± 0.2	0.461	22.9 ± 0.9	0.415 ± 0.011	0.871	4.57
D5	0.25	2.42 ± 0.02	26.7 ± 0.4	22.9 ± 0.6	0.304	23.4 ± 0.5	0.651 ± 0.064	0.763	5.85
D6	0.30	2.29 ± 0.08	29.5 ± 0.7	23.7 ± 0.1	0.303	21.7 ± 0.9	0.650 ± 0.031	0.798	6.52
D7	0.35	2.16 ± 0.12	30.4 ± 0.5	23.9 ± 0.3	0.312	18.0 ± 0.7	0.570 ± 0.032	0.695	6.29
C50X30^a— CF/CR
D0	0.20	33.6 ± 1.9	0.32 ± 0.2	4.71 ± 0.9	0.521	65.2 ± 3.5	1.97 ± 0.21	0.854	13.03

^a Compositions of fed medium, i.e., C100X60, 100 g L⁻¹ cellobiose and 60 g L⁻¹ xylose; C50X30, 50 g L⁻¹ cellobiose and 30 g L⁻¹ xylose; ^b dilution rates; ^ccell concentration; ^deffluent cellobiose concentration; ^eeffluent xylose concentration; ^fratios of consumed xylose over consumed cellobiose; ^glactic acid concentration; ^hacetic acid concentration; ⁱyields of lactic acid production; and ^jlactic acid productivity

ISSN: 2731-3654