Potato starch extraction process

Potato starch extraction process

      Potato starch is starch extracted from potatoes. potatoes flour extraction machinery,The cells of the root tubers of the potato plant contain starch grains. Potato starch contains typical large oval spherical granules ranging in size between 5 and 100 μm. Potato starch is a very refined starch, containing minimal protein or fat. This gives the powder a clear white colour, and the cooked starch typical characteristics of neutral taste, good clarity, high binding strength, long texture and a minimal tendency to foaming or yellowing of the solution.

The potatoes starch extraction process mainly include 7 steps :

1.Fresh potatoes washing process  of potato starch extraction process

The Soil and dirty on the potato will be removed in the washing process. If not , they will give problem later . The washing is therefore very important.

2.Potatoes rasping process of potato starch extraction process

Rasping is the first step in the starch extraction. The goal is to open the tuber cells and release the starch granules. The slurry obtained can be considered as a mixture of pulp (cell walls), fruit juice and starch.

3.Potato starch extraction of potato starch extraction process,potatoes flour extraction machinery

Powerful washing is needed to flush the starch granules out from the cells - the cells are torn apart in the rasper and form a filtering mat that tries to retain the starch. Water has previously been used for the extraction, but today extraction takes place in closed systems allowing the use of the potato juice itself. 

4.Crude potato starch milk de-sanding process of potato starch extraction process

The de-sanding process is remove the small amount sand in the crude potato starch milk by gravity difference . 

5.Potato starch milk concentration and purifying process of potato starch extraction process

The hydro cyclones will used for potato starch concentration and purifying by gravity, then get the purity white potato starch milk . To save water the wash is done counter currently

6.Potatoes starch vacuum dewatering process of potato starch extraction process

The vacuum de-watering process will remove the excess water from the purity potato starch milk to get the wet potato starch. After dewatering process, the moisture of wet potato starch is around 38%~40%.

7.Potato starch drying and sieving process of potato starch extraction process,potatoes flour extraction machinery

The moist starch from the rotating vacuum filters is dried in a flash dryer with moderate hot air. The air is indirectly heated. Before delivery the starch is sifted on a fine sieve. 

If you want to get into potato starch production business and want to know more about our potato starch production line extraction process and equipments  , please contact with us freely .potatoes flour extraction machinery