Enhancement of physical and chemical properties of rice hull via Huangshui bioconversion for improved Baijiu quality
This study investigated Huangshui fluid pretreatment effects on rice hull's physical properties and furfural removal, revealing optimal conditions (solid-liquid ratio 1:15, pH 3.2, 60 °C, 6 days) achieving furfural reduction to 68.55 ± 0.33 mg/100 g (below harmful thresholds), while reducing test weight to 87.04 ± 0.749 g/L ( p < 0.05) without compromising water absorption/elasticity ( p > 0.05). Gas chromatography demonstrated Huangshui-treated rice hulls enhanced crude Baijiu quality: acetaldehyde decreased 38.30 % ( p < 0.01), furfural 49.02 % ( p < 0.01), methanol 9.37 %, fusel oil 6.31 %, while hexanoic acid increased 25.22 %, ethyl hexanoate 69.95 %, and four major esters 24.45 %. The pretreatment significantly improved mash looseness and flavor profiles, confirming its feasibility for reducing harmful compounds and upgrading Baijiu quality through effective impurity removal and ester enrichment.
危险品化学品经营许可证（带存储）