How to make liquid glucose from maize ?|FAQ

How to make liquid glucose from maize ?

2018-09-27 /

As is known, glucose is produced by hydrolysis of starch. If we want to make glucose form maize, we need to get starch firstly. How to make liquid glucose from maize, the procedures are as bellow: starch extraction from maize, liquefaction, protein removing, saccharification, decolorization, activated carbon elimination, ion exchange process, evaporation and final product packing.
In all kinds of starch, maize starch is the best raw material to make glucose. The 1st step of how to make liquid glucose from maize is to get maize starch slurry. Firstly clean maize to remove attached impurities on the surface, then steep maize in acid liquid for a certain time. After that, crush steeped maize and separate germs. Next step is fine milling of maize, and then remove fibers and gluten. Finally by using of hydrocyclone, we can get purified starch slurry as output product.

Liquid glucose production from maize

After we get maize starch slurry, then we should focus on how to make liquid glucose from maize starch. Because we already get starch slurry from above procedures, there is no need to mix water with starch again. Pump starch slurry into liquefaction tank, by the effect of jet cooking, starch slurry suspension becomes transparent paste, which is called gelatinization that provide better environment for liquefaction enzyme. After liquefaction is proceed completely, we can get dextrin.

Before saccahrification is performed, filter press is used to remove protein and other water-insoluble solid impurities in the dextrin liquid. This is very important to how to make liquid glucose from maize starch in high quality. The less protein and other impurities, the better for saccharification process.

Liquid glucose production equipment

Saccharification is the key process of how to make liquid glucose from maize starch. In the process, we should add enzyme in the dextrin liquid to finish hydrolysis of starch completely. Degree of starch hydrolysis determines DE value that is the main specification for liquid glucose. From saccharification process, we can get crude sugar solution as end product.
In the crude sugar solution, there still exist organic impurities, which cause deep color of the liquid. In the decolorization process of how to make liquid glucose from maize starch, activated carbon is used to remove organic impurities dissolved in water. Filter press machine will be used followingly to eliminate carbon.

Next step is ion exchange process. After the water-insoluble impurities and organic impurities in the sugar liquid are removed, there still contain many inorganic impurities dissolved in water. The purpose of ion exchange is to remove these water-soluble inorganic impurities.

Liquid glucose evaporation machine

The last step of how to make liquid glucose from maize starch is evaporation process. After previous steps, impurities in the liquid glucose are mostly removed. The last step will use evaporator to remove excess water and get final glucose syrup in certain density. Three-effect evaporator is commonly used.

To sum up, how to make liquid glucose from maize in high quality, the best solution is 1) extract starch slurry from maize; 2) hydrolysis of starch granules (liquefaction and saccharification); 3) remove impurities (decolorization and ion exchange); 4) evaporation and packing.