复合酶系高浓度玉米淀粉乳液化工艺的研究

Research on Liquefaction Technology of High Concentration Corn Starch With Compound Enzyme System

淀粉糖生产中提高淀粉乳的初始浓度,可以减少糖液蒸发过程的蒸汽用量,降低生产成本。但是提高淀粉乳浓度会出现糊化液化过程淀粉糊黏度过大,导致液化不充分、糖化得率低等问题。开发了一种复合酶系预处理工艺,可以有效降低高浓度淀粉乳液化过程的黏度,使液化可以顺利进行。在最佳预处理条件下,40%浓度玉米淀粉液化峰值黏度可有效降低55.4%,与正常生产中32%浓度淀粉乳的黏度持平,为高浓度玉米淀粉液化过程工业化提供了可能。

Increasing the initial concentration of corn starch slurry can reduce water and energy consumption in starch sugar production to cut the cost.However,the viscosity of starch paste increased during gelatinization and liquefaction when starch concentration increased to a certain degree,resulting in insufficient liquefaction.In the study,a compound enzyme system pretreatment process was developed,which can effectively reduce the viscosity of high concentration starch slurry to make the liquefaction smooth.Under the optimal pretreatment conditions,the peak liquefaction viscosity of 40%corn starch slurry could be effectively reduced by 55.4%,which was the same as that of 32%corn starch emulsion in normal production.It provides a possibility for the industrialization of high concentration corn starch liquefaction process.