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Maltodextrins producing technology

The starch milk is fed into the liquefaction PH adjustment tank measurably, PH is continuously adjusted with adding of Na2CO3 solution by metering pump according to starch milk flow rate, part of the α-starch enzyme is adding to the tank at the same time.

Adjusted starch milk is pumped to 1st jet cooker to have the 1st liquefaction done with steam, the gelatinized starch solution is sent to 1st retention tank and then pumped to 2nd jet cooker to have the 2nd Liquefaction is done with steam, the hydrolysate is sent to 2nd retention tank. The other part of the liquefaction enzyme is added to the discharge line of the tank. After the solution is pumped to a continuous plug flow reactor to complete the liquefaction. A part of the liquefied material is sent to be raw material to make malt syrup, the temperature has been cooling to 70℃ before the other part goes to the next unit.

3.Vacuum rotary drum filtration:
The liquefied maltodextrin contains lots of protein-based insoluble impurities that are difficult for filtration. It adopts a diatomite precoating vacuum drum filter to do the filtration since the filter cake on the surface of diatomite is being removed continuously to be always new which makes the filtration fast and in-depth.

4.Decolorization and filtration:
Adding activated carbon to the maltodextrin liquor to absorb the organic impurities (mainly the soluble colored impurities), then filter the activated carbon together with the impurities filtered.

5. Ion exchange refining:
After the filtration of soluble and insoluble impurities, there still exist some insoluble inorganic impurities in the maltodextrin liquor exist in the form of cation and anion, ion exchange aims to remove them, the cation inside the saccharified material is exchanged with the H+ of cation exchange resin, while the anion is exchanged with the OH- of anion exchange resin, then the exchanged H+ and OH- inside the saccharified material is combined to water, the inorganic impurities came to corresponding water for filtration.
Certainly, to keep the exchangeability of exchange resin, it usually uses acid and alkali to regenerate the cation and anion resin respectively when the exchangeability weakened.

6.Vacuum concentration:
The syrup after ion exchange go through a multi-effect vacuum falling film evaporator to remove part of the water, then the concentration will be increased from about 35% to 60%.

7.Spray drying:
Maltodextrin crystal after vacuum concentration is sent for spray drying through plunger pump to get powdered solid maltodextrin.

Do different kinds of packages according to the marke's need for easy delivery.​

G-Luckey is an engineering consulting firm, offer fermentation process, corn wet milling service in starch sugar manufacturing industry. We have many cases for fructose, glucose, erythritol, allulose, xylitol, sorbitol production line.

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