Extraction of sugarcane bagasse arabinoxylan, integrated with enzymatic production of xylo-oligosaccharides and separation of cellulose

Table 5 Pressurized liquid extraction (PLE) experimental design

PLE	NaOH (M)	Temp	Time	Ara	Gal	Glu	Xyl	Lignin	Cellulose	Hemicellulose	Xylan extraction yield (% of total xylan)
1	0.05	150	10	1.28	0.26	53.60	23.61	19.31	48.24	22.14	12.82
2	0.05	50	10	1.64	0.54	40.96	22.77	25.93	36.86	21.97	13.49
3	0	150	20	0.73	0.34	45.62	24.33	27.84	41.06	22.36	11.94
4	0.1	150	20	0.92	0.18	60.46	22.92	13.05	54.41	21.14	16.74
5	0	100	10	1.52	0.54	42.28	24.13	28.35	38.06	23.05	9.21
6	0	50	20	1.43	0.51	41.52	23.53	25.82	37.36	22.42	11.69
7	0.1	50	20	1.92	0.51	42.38	23.01	25.18	38.14	22.40	11.78
8	0.1	100	30	1.63	0.39	49.88	24.35	18.44	44.89	23.21	8.59
9	0.05	100	20	1.84	0.46	45.83	25.36	23.68	41.25	24.35	4.08
10	0	100	30	1.46	0.52	42.25	24.19	23.98	38.03	23.04	9.24
11	0.05	50	30	1.59	0.52	42.12	23.30	29.50	37.91	22.38	11.87
12	0.05	100	20	1.78	0.44	45.59	24.52	23.47	41.03	23.97	5.61
13	0.1	100	10	1.77	0.44	48.31	24.45	20.20	43.48	23.47	7.58
14	0.05	150	30	1.15	0.21	53.58	23.68	17.08	48.22	22.04	13.21
15	0.05	100	20	1.89	0.48	45.21	25.44	23.35	40.69	24.48	3.58

Conditions, chemical composition of monosaccharides (%) and polymeric sugar contents in the remaining residue, and extracted xylan yields (with three replicates in experiments are shown. No.9, 12 and 15 with STDV 1.05 in xylan extraction yield). The cellulose and hemicellulose were calculated from the monosaccharide yields as explained in Table 2
Ara arabinose, Gal galactose, Glu glucose, Xyl xylose

ISSN: 2731-3654