Facile isothermal solid acid catalyzed ionic liquid pretreatments to enhance the combined sugars production from Arundo donax Linn.

Table 3 Enzymatic saccharification and products in pretreatment liquor of raw and pretreated A. donax

Samples	Enzymatic hydrolysis			Pretreatment liquor^a
Samples	Initial enzymatic rate (g/kg/h)^b	Reducing sugar (g/100 g)^c	Cellulose digestibility (%)^d	TRS (%)	ASL (%)	Lactic acid (%)	Acetic acid (%)	Formic acid (%)	HMF (%)	FF (%)
Raw	17	9.7	12.5	–	–	–	–	–	–	–
R90-1.0	87	24.6	36.7	2.9	0.8	4.98	ND^e	ND	ND	ND
R100-1.0	57	25.7	41.9	5.1	1.4	4.90	ND	ND	ND	ND
R110-1.0	92	29.6	66.7	28.8	2.6	4.70	ND	ND	ND	ND
R120-0.5	146	30.9	66.7	18.1	2.4	4.96	ND	ND	ND	ND
R120-1.0	167	21.9	73.2	31.8	3.7	4.96	ND	ND	ND	ND
R120-1.5	226	15.3	90.2	43.0	5.8	5.94	ND	ND	ND	ND
R130-0.5	149	26.4	65.2	23.5	3.3	5.06	ND	ND	ND	ND
R140-0.5	177	11.5	69.6	40.4	5.8	5.72	ND	ND	ND	ND
R150-0.5	92	3.9	41.0	35.2	6.1	5.56	ND	ND	ND	ND

All data are means of three replicates
^aData referred to the products in pretreatment liquor are based on dry raw materials
^bSugar released within the first 3 h based on dry pretreated sample
^cSum of glucose and xylose released in the enzymatic hydrolysates based on dry raw materials
^dData are calculated after 72 h of enzymatic hydrolysis at 48 °C
^eNo detectable levels (below 0.1 % based on dry raw materials)

ISSN: 2731-3654