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Published on: June 6, 2025
Structure-property evolution of insoluble dietary fiber from wheat bran under solid-state fermentation and its effect
Wei Liang1, Qian Lin1, Ke Xiong2
1Shaanxi Union Research Center of University and Enterprise for Grain Processing Technologies, College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
None:
This study investigated the role of co-fermentation in converting wheat bran biomass by characterizing insoluble dietary fiber (IDF) extracted at different stages (12, 24, 48 h) of fermentation with various strains (Control, NF, YF, LF, MF). Microscopic observations (SEM, CLSM) showed that fermentation caused IDF structural breakdown, particle size reduction, and honeycomb-like porous morphology. FT-IR and XRD verified structural degradation and increased molecular disorder. These changes enhanced thermal stability, water retention, and oxygen vacancy intensity, with particle size reduced. The porous structure improved physicochemical and functional properties, promoted phenolic release, and strengthened antioxidant activity. The mixed fermentation (MF) group exhibited the most significant degradation and superior structural and functional properties compared with single strains. These findings provide a feasible approach for high-value utilization of wheat bran biomass.
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