The production of high fructose corn syrup involves the starch hydrolysis

2018-09-28 /Industry news
High fructose corn syrup was introduced into the food supply in the 1970s. It comes from corn starch and hydrolysis starch toproduce fructose by enzymatic action. The fructose is then mixed with glucose to achieve the desired ratio of both. Highfructose corn syrup (HFCS) consists of 42% or 55% fructose (depending on the type of HFCS and the desired sweetness). The nameof high fructose corn syrup makes people mistakenly believe that HFCS has a high fructose content. In fact, the content offructose in HFCS is similar to that in sucrose, which consists of 50% fructose and 50% glucose.

corn starch production machine
Corn starch production equipment

 
The raw material for the production of high fructose syrup involves the starch hydrolysis is glucose, which is converted fromstarch. The basic process for the production of high fructose syrup is that the starch containing slurry can form dextrinthrough the catalytic action of α-amylase; the dextrin catalyzes the glucoamylase to form glucose; the glucose is catalyzed byglucose isomerase, the molecule structure changes, which is called isomerization of glucose. After the isomerization ofglucose, fructose is formed. However, not all glucose is converted to fructose after isomerization. This is because when theglucose isomerase has the highest catalytic efficiency (temperature is 60-70 °C), the ratio of glucose conversion to sugar isonly 53.5% to 56.5%, and it takes a long time to balance this catalytic reaction. Therefore, the ratio of glucose produced inthe production of glucose is actually only 42% to 45%, and the rest is still glucose. That is to say, such a product isactually a mixture of glucose and fructose, and this mixture is called fructose syrup. For the production of high fructose cornsyrup involves the starch hydrolysis If the fructose and glucose in the fructose syrup are separated, the separated glucose isagain isomerized, and thus repeated several times, the final mixture can have a content of fructose of 70% to 90%, such amixture is called high fructose syrup.

corn syrup manufacturing plant
Syrup equipments for the high fructose corn syrup production

 
There are two basic principles for enzyme immobilization technology for the production of commercial products (the productionof high fructose corn syrup involves the starch hydrolysis):
1. The pH of the starch slurry is adjusted in a slurry tank and heated to fix the glucose isomerase in the bacteria. Filter andwash with water. The filter cake is dried and pumped into a plate and frame filter with a mixture of glucose, MgSO4 and NaHSO3containing corn starch hydrolysate until each leaf is coated with a solid phase enzyme preparation having a thickness of 2.54to 3.81 cm. The device acts as a reactor, that is, the saccharification of the starch slurry.

2. Adsorption of glucose isomerase on DEAE-cellulose or other adsorbents, now usually uses professional isomerism equipment topump corn syrup into the reactor, so that the flow rate is controlled by 45% glucose conversion sugar. When the activity of thesolid phase isomerase preparation is gradually decreased, the flow rate is gradually reduced, so that glucose still has 45% ofthe converted sugar.From 1950 onwards, high fructose corn syrup was produced by fermentation of glucoamylase to give a DE value of 95-97. This syrup is quite sweet and contains fermentable sugars at a higher ratio than other corn syrups, mainly for fermentationproduction. Medium, such as bread and alcohol. Because of its high glucose content (up to 95%), it can be used as a commercialglucose crystal for food. Since the syrup crystallizes rapidly, it is necessary to raise the temperature (54 to 61 ° C) duringtransportation and storage to prevent crystallization. Now, the starch hydrolysis by enzyme for the production of high fructosecorn syrup has been a popular and most advanced method, can get high quality syrup, more stable.

fructose syrup production machine
Fructose syrup production equipments

 
Finally, it's worth to say that Doing Company can manufacturer all machines used for the production of high fructose corn syrupinvolves the starch hydrolysis, include the corn starch production line and all syrup equipments used for the production ofhigh fructose corn syrup, and we will offer the technology data for your HFCS production, install and adjust the machines toguarantee it can work smoothly, also in charge of to train the operator in your factory.

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