What is the preparation process of starch from cassava

What is the preparation process of starch from cassava

Starch has become one of the main value-added products of cassava processing. Do you know the preparation process of tapioca starch? This is the detailed information.

The main preparation process of tapioca starch can be divided into four parts. It includes cassava cleaning and washing process, crushing and extraction process, separation and concentration process, and drying and packaging process.

1. The washing and washing process of cassava:

The cassava cleaning and washing process is the first step in preparing starch from cassava. It mainly removes the dirt and skin of cassava. The cleaning process is divided into two steps. Use dry screen and paddle washing machine. Specific workflow:

-The fresh cassava roots are conveyed to the dry sieve through a conveyor belt to remove stones, leaves, branches and other large impurities.

-After entering the paddle washing machine, under the action of the stirring paddle in the paddle washing tank, the cassava rubs each other to remove the skin and sediment. Adopting the principle of countercurrent cleaning, the cleaning effect is good;

2. Crushing and extraction process

Starch is stored in cassava root cells and needs to be crushed to obtain it. Crushing is the process of crushing large solid materials into suitable or fine starch by external force. At present, cassava choppers and grinders are commonly used for crushing.

Specific workflow:

-Use a cutting machine to pre-crush the cassava, and then crush it to 3-5 cm.

-Use a wood mill to fully crush the cassava to obtain a starch slurry. The coarse mill can completely open the cell wall of cassava and convert the bound starch into free starch, thereby ensuring a high starch extraction rate.

3. Separation and concentration process

The separation and concentration process in the preparation of cassava starch is one of the important links. The main cassava starch processing machine in this section includes centrifugal screens, desanders, hydrocyclone stations and peeler centrifuges.

After crushing, the starch slurry is pumped to a separation zone where the starch is separated from the fibers. After sieving the fibers, they are de-sanded. Then, the hydrocyclone station will wash and concentrate the starch slurry to remove cell fluid, fat, protein, etc. The water content of the concentrated starch slurry is about 80%-85%. Therefore, it needs to be dehydrated by a stripper centrifuge to reduce the moisture content to less than 40%, which will save drying costs.

Specific workflow:

-After crushing, the starch slurry is transported to the centrifugal sieve through a pressure pump for preliminary separation to filter fibers.

-After separation and filtration, the slurry is pumped to the desander for desander operation.

-After sand removal, the slurry is pumped into the peeler centrifuge for dewatering.

4. Dry packaging process

The concentrated starch is transported to the drying system through a screw conveyor to keep the water content of the starch product at 12% to 13%. In order to avoid starch loss, the drying system is equipped with a special cyclone separator to recover starch. The drying and packaging process includes rapid dryers and automatic packaging machines.

Specific workflow:

-The flash dryer is negative pressure drying, which can instantly evaporate surface water.

-After drying, pump the tapioca starch to the feed port of the packaging machine, which can automatically complete the packaging process.

The preparation process of tapioca starch will affect the quality of the final tapioca starch. Therefore, you'd better choose reasonable, stable and advanced processing technology. Duning is committed to the continuous upgrading of machine production technology. We believe that we can provide you with efficient and high-quality tapioca starch processing machines. If necessary, please feel free to contact us.