摘要
添加耐高温α-淀粉酶脱胚玉米挤出物经过液化、糖化后制得葡萄糖浆,此糖化液经过滤得到的滤饼中含有少量的抗性淀粉。未被水解的淀粉影响糖浆的收率,因而需要控制挤压—糖化系统参数,使滤饼中的抗性淀粉含量降低到最低程度,产生最大的经济效益。经频数选优得到最佳工艺参数为:挤压原料淀粉酶添加量0.80 L/t,螺杆转速140.0 r/min,液化时耐高温淀粉酶添加酶量0.50 L/t,液化时间20.0 min,糖化时葡萄糖淀粉酶添加量1.50L/t。
The glucose syrup was abtained from extruded degermed corn added thermostable α-amylase.Resistant starch type Ⅲ was produced in the filter cake.In order to reduce the resistant starch type Ⅲ contents,the extrusion-saccharification system parameters of the extrusion need to be optimized.In this paper,a five-variable,five-level central composite rotatable design was employed to achieve the aims of this experiment.The influence of extrusion-saccharification system parameters on RS3 content was studied.The optimized extrusion parameters were showed below: the thermostable α-amylase content during extrusion was 0.80L/t,the screw rotating speed was 140.0r/min,the thermostable α-amylase content during liquefaction was 0.50L/t,the liquefaction time was 20.0min,the glucoamylase conteng was 1.50L/t.At this condition the resistant starch type Ⅲ content was 0.26%.
出处
《农机化研究》
北大核心
2012年第9期190-194,共5页
Journal of Agricultural Mechanization Research
基金
山东省自然科学基金项目(Y2008B10)
关键词
抗性淀粉
挤压
脱胚玉米
滤饼
葡萄糖浆
extrusion
resistant starch
degermed corn
filtrated caked
glucose syrup
