Table 2. Sugar and inhibitors in hydrolysate during oxalic acid pretreatment of spent mushroom medium at various CSF (Unit : g/L)

Time/(Acid concentration)	CSF	Glucose	Xylose	Formic acid	Acetic acid	HMF	Furfural	TPC
2 min/(82 mM)	0.72	0.78	0.28	N.Da	N.D	N.D	N.D	1.70
10 min/(41 mM)	1.22	1.22	1.82	N.D	N.D	N.D	0.29	2.70
30 min/(24 mM)	1.52	0.99	1.51	1.11	1.21	0.26	0.62	3.45
10 min/(122 mM)	1.59	9.26	6.37	1.54	3.06	0.45	0.87	4.32
30 min/(82 mM)	1.89	7.89	4.92	1.36	2.61	0.79	1.41	3.24
30 min/(82 mM)	1.89	7.64	5.11	1.33	2.95	0.78	1.51	3.79
30 min/(82 mM)	1.89	7.60	5.41	1.38	3.15	0.81	1.56	3.97
50 min/(41 mM)	1.92	7.76	5.94	1.21	2.59	0.85	1.72	4.53
30 min/(139 mM)	2.08	7.93	5.32	2.10	3.06	0.85	1.73	4.46
58 min/(82 mM)	2.18	6.90	3.85	1.69	3.48	1.42	2.27	4.24
50 min/(122 mM)	2.29	7.45	3.74	2.23	3.80	1.38	2.22	4.76

N.D means not detectable.