Research Article

Cellulolytic Enzymes Production via Solid-State Fermentation: Effect of Pretreatment Methods on Physicochemical Characteristics of Substrate

Table 2

Physical attributes of various substrates.

SampleDegree of crystallinity (%)Adj. for X-ray fittingRMSE for X-ray fittingBed porosity (%)Volumetric specific surface (cm−1)

Native soybean hulls42.56 ± 3.340.9115.0640.41 ± 1.91122.28 ± 1.91
Steam-treated soybean hulls57.16 ± 2.390.9412.4857.45 ± 0.50120.41 ± 2.34
HCl-treated soybean hulls56.29 ± 0.120.9413.4053.65 ± 0.12120.28 ± 2.47
H2SO4-treated soybean hulls56.53 ± 0.120.9513.3550.02 ± 0.68120.77 ± 2.16
NaOH-treated soybean hulls59.72 ± 0.430.9611.7056.77 ± 0.57128.09 ± 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.