黑加仑果渣膳食纤维挤出改性工艺优化

采用双螺杆挤出技术对黑加仑果渣膳食纤维进行改性处理,通过单因素试验分析了水分添加量、物料粒度、挤出温度、螺杆转速四个因素对可溶性膳食纤维含量的影响,并采用正交试验对改性工艺进行优化。最终确定最佳工艺参数为:水分添加量为40%,物料粒度为80目,挤出温度为140℃,螺杆转速为160r/min。在此条件下,可溶性膳食纤维含量达24.87%,且各因素对可溶性膳食纤维含量的影响程度大小依次为水分添加量>挤出温度>物料粒度>螺杆转速。

The twin screw extrusion technology for Ribes nigrum L. dietary fiber modification treatment, by single factor analysis of the amount of water, the impact of material size, extrusion temperature, screw speed four factors on the content of soluble dietary fiber, and the use of orthogonal design modification process optimization. Ultimately determine the optimum process parameters： water dosage 40%, 80 mesh material, extrusion temperatfire of 140 ℃, a screw speed of 160r / min. Under this condition, the soluble dietary fiber content of 24.87%, and the various factors on the soluble dietary fiber content of the degree of influence the order of the amount of water added〉 extrusion temperature〉 material size〉 screw speed.