电解水替代强碱提取大豆渣可溶性多糖工艺优化研究

Optimization of extraction of soluble polysaccharides from soybean residue by electrolyzed water replacing strong alkali

豆渣为大豆加工的剩余物,利用率低,电解水(Electrolyzed Water,EW)是1种酸碱温和,环境友好的溶剂。此实验以豆渣为原料,目的是对电解水替代强碱提取大豆渣可溶性多糖的方法进行探究优化。以电解水不同程度代替传统工艺中所用的NaOH,在单因素试验的基础上,应用正交分析法得到了电解水提取大豆渣多糖最佳工艺条件:提取温度65℃、提取时间70 min、提取pH=11、料液比1∶10,所得大豆渣可溶性多糖提取率为8.71%;优化实验中得到了当EW∶NaOH(V∶V)=4∶6时综合提取效果最好,提取率为12.08%。该方法与传统碱提法的提取率相近,但减少了40%的强碱使用量,在工业生产上不失为1种即经济又绿色的提取方法。

Okara is the remainder of soybean processing with a low utilization rate.Electrolyzed water(EW)is an environment-friendly solvent with mild acid-base.This experiment used okara as the raw material to explore and optimize the extraction method of soluble polysaccharides from okara with electrolyzed water instead of strong alkali.The electrolysis water was used to replace the NaOH,which was used in the traditional process.On the basis of single factor test,the orthogonal process was adopted to obtain the optimal process conditions for the extraction of soybean residue polysaccharides from electrolysis water:extraction temperature 65℃,extraction time 70 min,extraction pH of 11,material-to-liquid ratio of 1∶10,and the extraction rate of soluble polysaccharides from soybean residue was 8.71%.The optimization experiment showed that when EW∶NaOH(V∶V)=4∶6,the comprehensive extraction effect was the best,and the extraction rate was 12.08%.The extraction rate of this method is similar to that of the traditional alkali extraction method,but it reduces the use of strong alkali by 40%.It is an economical and environment-friendly extraction method in industrial production.