Tapioca starch extraction process

The tapioca starch extraction process adopts the wet processing process of cassava starch, which including raw material sorting, cassava cleaning, paddle washing, grinding, starch slurry screening, bleaching, desanding, starch slurry concentration and refining, starch dewatering, the negative pressure air flow drying and drying.

Tapioca starch extraction process

1. Cleaning and washing unit: New harvest cassavaes from the ground should first dry and sieve to remove the impurities as much as possible. Then the cleaned cassava is transported into rotary washing machine to further remove the attached debris such as sand, soil and dirt. And then the clean cassava is stored in daily designated area in tapioca starch extraction process.

2. Grinding unit: The washed cassava is then transported into rasper for grating. Rasper is used for grating cassava to break the cell wall of cassava and release starch from cassava cell. This is an important procedure in tapioca starch extraction process. DOING rasper is a machine widely absorbs advanced international technology. Compared with other products, it is composed of hundreds of saw blades, and featured with high speed, fine grinding, high free rate of starch, high production capacity and high rate of starch extraction.

3. Screening unit: This process is mainly for the separation of starch and fiber. Centrifuge sieve utilizes high speed centrifugal force to remove the fiber and starch. To achieve better separation effect, tapioca starch extraction process normally use multi-stage centrifuge sieve.

Cassava grinding machine

4. Desanding unit: After the separating section, the starch slurry still contains sand which need to be removed by desander machine. The function of cassava starch processing machine in tapioca starch extraction process is to fully remove the fine impurities in starch so as to ensure the taste and quality of starch.

5. Concentration and refining unit: The function of this process is to separate insoluble protein and residual soluble protein and other impurities from the starch slurry, thereby achieving the purpose of washing, refining and concentrating the starch slurry. The tapioca starch extraction process uses a 12-stage hydrocyclone station to wash, refine and concentrate the starch slurry.

6. Dehydration unit: Starch slurry stays in starch jar after refining in tapioca starch extraction process, and then is sent to vacuum filter for dehydrating. The wet starch water content after dehydration is 38-40%.

Cassava starch drying machine

7. Drying unit: This tapioca starch extraction process is mainly used to dry the wet starch to meet the production standards. Flash dryer as the drying machine has the features of high thermal efficiency, short drying time and large handling capacity. Drying process requires the particle size of the cassava starch in the range of 0.5mm and 0.7mm.

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