In the Preparation Section starch slurry is PH adjusted in order to create optimum conditions for the liquefaction enzymes.
Adjusted starch milk is pumped to 1st.jet cooker to have the 1st. liquefaction done with steam ,the gelatized starch solution is sent to 1st. hold tank and then pumped to 2nd. jet cooker to have the 2nd. Liquefaction done with steam, the hydrolysate is sent to 2nd. hold tank. The other part of liquefaction enzyme is added to the discharge line of the tank.After the solution is pumped to continuous plug flow reactor to complete the liquefaction . The temperature is been cooling to 60℃ before goes to the Saccharification unit.
Adding Hcl continuously to adjust the PH value according to the hydrolysate flow rate ,and has the saccharification with the help of enzyme,during the process,stir it to make the saccharification goes evenly ,after achieve the required DE value ,the material is sent to the next unit.
4 Press filter
There is large amount of insoluble impurities in saccharified liquid and most of the impurities are protein. By using frame filter could remove the insoluble impurities in the sacchrified liquid.
5 Carbon Treatment：
During the carbon treatment, colour compounds are separated from the product.
From the protein filtration the product goes to a buffer tank, where activated carbon is continuously dosed by dosing screw. The product will reside in the buffer tank for 30 minutes allowing the activated carbon to adsorb colour compounds from the product. Then the product is pumped through a plate and frame filter, where the carbon is separated from the product.
6 Ion exchange
After the insoluble impurities and organic impurities in the saccharified are removed, there are still many inorganic impurities in the water, which exits as positive ion and anionic in the water, and they will be removed by ion exchange. The positive ion in saccharified liquid is exchanged with cation exchange resin H+, meanwhile the anionic is exchanged with the anion exchange resin OH-, at last, exchange the H+ with OH-, which turns out water, so all the inorganic impurities has been turned into water and removed.
Certainly ,to keep the exchange ability of exchange resin ,it usually use acid and alkali to regenerate the cation and anion resin respectively when the exchange ability weakened.
In the Evaporation section the product will be concentrated to 72% dry solids by means of a four stage falling film evaporator with thermal recompression.
From the ion exchange system the product is going to a buffer tank, then the product is pumped through the preheaters and into the first stage, then is pumped into the second stage, the third stage and the fourth stage. After the fourth stage the product is pumped to the next process section.
To fill the product liquid glucose into the vessels for transportation and storage.