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Intensifying soluble dietary fiber production and properties of soybean curd residue via autoclaving treatment

Li, Shuhong, Chen, Guiyun, Qiang, Siqi, Tang, Dong, Chen, Yue, Zhang, Zhenya, Lei, Zhongfang, Chen, Ye
Bioresource technology reports 2019 v.7 pp. 100203
autoclaving, dietary fiber, glucose, liquids, mannose, molecular weight, solubility, temperature, tofu, viscosity
Soybean curd residue (SCR) contains rich dietary fiber, but the low content of soluble dietary fiber (SDF) limits its development and utilization. To fully utilize SCR, autoclaving treatment (AT) was used to enhance the yield and properties of SDF. The results indicated that when SCR was treated under the condition of 128 °C for 10 min and solid liquid ratio 1:3, the yield of SDF increased to 23.60% compared with the original 11.13%. Under the optimized condition, SDF degraded into low molecular mass products by AT. Meanwhile, referred to the glucose, monosaccharide molar ratios in ASDF were increased except mannose. ASDF has a viscosity of 23.6 Pa·S when the concentration was 35 mg/mL. When the temperature reaches to 90 °C, the solubility of ASDF is 9.24 g/100 mL. The results indicated that AT is a potential pathway to improve yield and properties of SDF in SCR.