How to produce potato starch?

The process for how to produce potato starch is designed in the folowing:
Potato choosing and weighting-cleaning and washing-crushing-separating and desanding-concentrating and refining-dewatering-drying and packing

1.Pretreatmant of potato
a. The choosing and weighting
Before processing, it is important to choose proper potato varieties for furthur processing.The quality of the raw potato have an great influence on the final starch quality for the process of how to produce potato starch. Therefore it will be better to choose high quality potato. After choosing,the collected potato is weighted and stored in the potato yard for deep procesing.
b.The cleaning and washing process
The weighted potato is transported into the potato cleaning machine by the conveyor. In the cleaning process of how to produce potato starch, the dirt, small stone and other impurities will be cleaned. Then it goes into the rotary washing machine to remove the attached sand, dirt and other impurities. In order to achieve washing effect, the secondary washing process can be carried out.

2.potato starch extraction process
Potato grating process: After washing, the potato stays in the clean silo to drain the water, then it is transported into the rasper by screw feeder. The crushing process is an important process for how to produce potato starch which determines the starch yield. Therefore it will be better to choose a potato starch processing machine with high crushing coefficiency and high starch extration rate. DOING rasper is such a machine to satisfy your need. By fully introduces advanced technology from home and abroad,the starch breaking rate of the rasper is above 94%.
3. Starch slurry separating and refining process
a.The separating and desanding process
The separating process is mainly to separat the fiber from the starch for how to produce potato starch.In this process in the potato starch poduction line, the used machine are centrifuge sieve and fine fiber sieve.This is another important procedure which determines the starch yield. So in order to reduce the loss of the starch, the separating process can be repeated for four times. But the separating procss can not remove the sand in the slurry.The high sand content in potato starch will result in poor taste and bad quality of starch.Therefore the desanding process is also important and necessary.

b.The concentrating and refining process
After separating, the starch milk goes into the concentrating and refining unit to further separating the protein and cell sap.
In this section for how to produce potato starch, 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.

4.Potato sstarch dewatering and drying process
a.The dewatering process in how to produce potato starch
The water content of starch milk coming out of hydrocyclone station is too large to dry directly. Therefore, it is necessary to dehydrate starch milk first to make sure the water content of starch is about 40%. With the help of vacuum filter, the starch milk is sucked into the drum, while the filtrate goes into the filtrate separation tank and pumped away by the filtrate pump. Then the starch goes into the air dryer feed hopper by cleaning conveyor belt.
b.The drying and packing process
Then is the drying process for how to produce potato starch. In the flash dryer machine,the wet starch is heated by the high speed hot air and the water evaporates in an instant. After drying, the wet air is discharged into the atmosphere by a ventilator, while the collected starch is transported by a screw conveyor to the packaging unit.Then the starch is packed for storage.


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