Detoxification of Corncob Acid Hydrolysate with SAA Pretreatment and Xylitol Production by Immobilized Candida tropicalis

Table 1

Influence of SAA conditions on recovery of sugars and xylan hydrolysis.

Conditions	Glucose (g/L)	Xylose (g/L)	Arabinose (g/L)	Xylan hydrolysis rate (%)
Control	1.47±0.07	33.42±1.33	2.06±0.11	77.04±0.13
Temperature^a (°C)
30	0.43±0.05	32.96±1.07	2.47±0.14	67.31±0.12
50	0.32±0.02	32.41±1.04	3.26±0.18	66.82±0.11
70	0.32±0.03	32.89±1.93	3.74±0.12	66.71±0.14
90	0.45±0.04	33.06±0.97	4.11±0.16	67.03±0.11
Ammonia content^b (%)
2.5	0.27±0.03	31.90±1.46	3.16±0.16	66.61±0.15
5.0	0.34±0.03	32.47±0.88	3.63±0.10	66.70±0.14
7.5	0.44±0.02	32.30±1.53	3.89±0.08	66.80±0.11
10	0.45±0.03	32.46±0.68	3.98±0.13	66.09±0.16
12.5	0.35±0.02	32.88±0.92	3.88±0.21	66.32±0.31
Time^c (h)
2	0.35±0.05	32.42±1.48	3.41±0.19	69.04±0.22
4	0.46±0.02	32.58±1.71	3.84±0.22	68.71±0.33
6	0.43±0.04	32.76±0.75	3.91±0.15	66.73±0.12
8	0.45±0.02	32.73±1.69	4.01±0.24	66.1±0.24
10	0.50±0.03	33.06±1.87	4.12±0.28	66.5±0.31

aAmmonia concentration in aqueous solution 5% and time 6 h.
^bTemperature 90°C and time 6 h.
^cTemperature 70°C and ammonia concentration in aqueous solution 10%.