Principle of isolation of starch from potato

Principle of isolation of starch from potato adopts the wet processing technology of starch production, and no additives are added in the whole production process. As a professional complete set equipment manufacturer, the whole principle of isolation of starch from potato has the features with matured technology, advanced equipment, scientific configuration and reasonable technology.

The principle of isolation of starch from potato is designed in the folowing sections:
Potato cleaning and washing-grating-separating-desanding-concentrating and refining-dehydration-drying and packing

1.Potato cleaning and washing section
New harvest potatoes from the ground should first dry and sieve to remove the impurities as much as possible. Then the cleaned potato is transported into rotary washing machine to further remove the attached debris such as sand, soil and dirt in principle of isolation of starch from potato.  And then the clean potato is stored in daily designated area in potato starch processing plant.
 

Potato cleaning machine

2.Grating section 
Potatoes are fed into potato starch processing machine for grating through screw conveyer. Grating is the most important process in principle of isolation of starch from potato, therefore it will be better to choose high efficient grating machine. DOING rasper is a high grating coefficient machine with a breaking rate more than 95%.

3.Sepateting section
The crushed photo contains fiber, protein and other impurities, therefore it need to separate the starch from the impurities. Centrifuge sieve is mainly used machine to separate the fiber and starch slurry. The slurry separation is also an important process in principle of isolation of starch from potato which determines the yield of starch. Therefore this process need to be repeat several times to improve the potato starch content.

4.Desanding section
After separating, there still exists sand in the potato starch. If the sediment concentration of the slurry is high, it will not only influence the taste of the starch but also affected the sales and price of starch. So the desanding process is a necessary process in principle of isolation of starch from potato. As potato starch machinery supplier, the desander can remove sediment in the starch, improve the make the product quality to a higher class.

Potato starch separating machine

5.Concentrating and refining section
After separating, the starch milk goes into the concentrating and refining unit to further separating the protein and cell sap in principle of isolation of starch from potato. In this section, the starch milk is firstly concerntrated through the hydrocyclone station, while the overflow of cell sap goes into recycling hydrocyclone station to recycle the containing starch.After multi-stage washing it not only ensures the washing effect of the starch but also avoids the loss of starch in the cell sap.

6.Dehydration section
Starch slurry stays in starch jar after refining in principle of isolation of starch from potato, and then is sent to vacuum filter for dehydrating. The wet starch water content after dehydration is 38-40%.

Potato starch dewatering machine

7.Drying and packing section
After dewatering of principle of isolation of starch from potato, the starch cake is dried in the flash dryer. The wet starch is heated by the hot wind and the water evaporates. After drying, starch is separated from air in a set of cyclone separators. Then the wet air leaves the cyclone separator and is discharged into the atmosphere by the ventilator. While the collected starch is transported by the screw conveyor to the packing unit. And the finished potato starch will be packed for storage.

The above is the principle of isolation of starch from potato process. Doing Company is a professional potato starch processing machinery manufacturer, welcome to contact us and visit our engineer. 

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