Cellulolytic Enzymes Production via Solid-State Fermentation: Effect of Pretreatment Methods on Physicochemical Characteristics of Substrate
Table 2
Physical attributes of various substrates.
Sample
Degree of crystallinity (%)
Adj. for X-ray fitting
RMSE for X-ray fitting
Bed porosity (%)
Volumetric specific surface (cm−1)
Native soybean hulls
42.56 ± 3.34
0.91
15.06
40.41 ± 1.91
122.28 ± 1.91
Steam-treated soybean hulls
57.16 ± 2.39
0.94
12.48
57.45 ± 0.50
120.41 ± 2.34
HCl-treated soybean hulls
56.29 ± 0.12
0.94
13.40
53.65 ± 0.12
120.28 ± 2.47
H2SO4-treated soybean hulls
56.53 ± 0.12
0.95
13.35
50.02 ± 0.68
120.77 ± 2.16
NaOH-treated soybean hulls
59.72 ± 0.43
0.96
11.70
56.77 ± 0.57
128.09 ± 1.84
Data are expressed as mean ± SE; . It should be noted that RMSE values are scaled on y-axis that represents X-ray intensities of various peaks corresponding to Bragg planes. Peak values are usually in the range of 100–500 counts.