How is sweet potato starch made?

The process for how is sweet potato starch made process is a physical separation process, which is to separate the starch from cellulose, protein, inorganic substance and so on. The Doing Company sweet potato starch production line can automatically complete the whole process of cleaning, washing, crushing, separating, concentration and refinement, dehydration, drying and packaging of sweet potato.

Part 1.Sweet potato cleaning 
Before cleaning the sweet potato, it is important to choose good raw material for how is sweet potato starch made. Different sweet potato contains different starch content, it will be better to choose fresh and high-quality sweet potato. Then the choosing sweet potatoes are transported into the cleaning machine by the conveyer. The sweet potato starch processing machine used to clean the sweet potato is dry sieve which can effectively remove the soil, sand and other impurities in the sweet potatoes. 

Sweet potato cleaning machine

Part 2.Sweet potato washing
The purpose of washing for how is sweet potato starch made is to wash the sediment in the outer cortex of sweet potatoes. And the used sweet potato starch processing machine in this process is rotary washing machine. By adopting the countercurrent principle, the sweet potato moves forward, while the water moves in the opposite way, thus the material can be washed thorough.

Part 3. Sweet potato rasping 
This is the key process in the how is sweet potato starch made process. In this process, the sweet potato is crushed into slurry. And the bound starch in sweet potato turns to free starch. And the extraction rate of sweet potato determines the final starch yield. DOING rasper is an advanced rasping machine with high rasping rate and high extraction rate.

Part 4. Starch and residue separation
This section is mainly used for separating fiber. The mainly used machine includes centrifuge sieve and fine fiber sieve for how is sweet potato starch made. The centrifuge sieve is mainly used for removing fiber and fine fiber sieve is for further removing fine fiber.  This is also an important procedure of isolation of starch from sweet potato. 

Sweet potato rasping machine

Part 5. Starch slurry concentration and refinement
Concentration and refining is the most important section in the process of how is sweet potato starch made, and the quality of starch is completely guaranteed in this section. The impurities in starch slurry are removed thoroughly by physical method, so as not to affect the quality of starch products. Hydrocyclone station is used in hot sale sweet potato roduction line to remove protein, fiber and cell sap out of starch.  A complete hydrocyclone technology includes the concentration, refining and recycling of starch.

Part 6. Starch dehydration
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, so that the water content of starch is about 38%-40%. In the how is sweet potato starch made process, the widely used dehydrating machine is vacuum filter. By utilizing the negative pressure,  starch is sucked on the drum of vacuum filter, while the filtrate is sucked into the filtrate separation and pumped away. Then the starch cake is scraped away by scraper and be transported by conveyor conveyor into the feed hopper of flash dryer.

Sweet potato starch drying machine

Part 7.Starch drying 
The dewatered starch need to be dried to meet the standard starch for how is sweet potato starch made. This sweet potato starch processing machine is called flash dryer. The flash air utilizes the high speed hot air to dry the starch which is complete in seconds. DOING flash dryer has the advantages of fast drying speed, high efficiency, high equipment production capacity and low equipment cost.

The equipment produced by Doing Company can complete the whole how is sweet potato starch made process from the input of raw materials to the production of finished starch. It can also be customized according to the actual situation and special requirements of users. We provide large, medium and small processing lines for how is sweet potato starch made with various configurations to meet the needs of different customer groups.

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