Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS 66506, United States.
Department of Industrial and Manufacturing Systems Engineering, Kansas State University, Manhattan, KS 66506, United States.
Bioresour Technol. 2020 Apr;302:122826. doi: 10.1016/j.biortech.2020.122826. Epub 2020 Jan 20.
Soft wheat bran (SWB), one of the most abundant byproducts from the wheat milling industry, is a potential candidate for biofuel production. In this study, bran starch hydrolysates were separately integrated with dilute acid pretreated SWB and alkaline pretreated SWB to boost fermentable sugar concentration. Alkaline pretreatment showed higher sugar recoveries than acid pretreatment. Significant sugar degradation for acid pretreatment was observed when pretreatment temperature higher than 170 ℃. The optimal pretreatment condition was 15% solid loading with 0.08 mol/L NaOH at 150 ℃ for 20 min. The neutralization reaction between dilute alkaline and released acids reduced sugar decomposition and inhibitors formation. Integrating bran starch hydrolysates with alkaline pretreated SWB yielded the highest glucose concentration of 50.91 g/L and a total sugar concentration of 101.29 g/L.
软质麦麸（SWB）是小麦碾磨工业中最丰富的副产品之一，是生物燃料生产的潜在候选原料。在这项研究中，分别将麦麸淀粉水解产物与稀酸预处理 SWB 和碱性预处理 SWB 集成，以提高可发酵糖的浓度。碱性预处理的糖回收率高于酸性预处理。当预处理温度高于 170℃时，酸性预处理会发生明显的糖降解。最佳预处理条件为 15%固载量、0.08mol/L NaOH，在 150℃下处理 20min。稀碱性和释放出的酸之间的中和反应减少了糖的分解和抑制剂的形成。将麦麸淀粉水解产物与碱性预处理 SWB 结合，可获得最高的葡萄糖浓度 50.91g/L 和总糖浓度 101.29g/L。
