What are methods for extraction of starch from potato?

Generally speaking, the extraction methods of potato starch are divided into traditional and modern methods, which means the precipitation method and the hydrocyclone staged extraction method. Now we will introduce the two methods for extraction of starch from potato to you.

the precipitation method VS the hydrocyclone staged extraction method

1. Traditional method for extraction of starch from potato--the precipitation method

Traditional method for extraction of starch from potato is to use the precipitation method to extract potato starch, that means the potato starch is extracted from the sedimentation tank through natural precipitation. After the potatoes are washed and broken into pulp, the starch mixture is placed in the sedimentation tank for 24-48 hours. In the period, due to the different proportions of starch, protein, sediment, and cell fluid, these non-starch substances floats on the top of the water and then are discharged with the current. Then the potato starch that precipitates and coagulates into blocks is obtained at the bottom of the tank. After that, by drying the wet potato starch on the sunlight or with a dryer, you can get the final potato starch powder.

While the traditional precipitation method extraction for potato starch is cost-effective, it may have limitations in terms of extraction rate and starch purity.

Traditional precipitation method

2. Modern method for extraction of starch from potato--the hydrocyclone staged extraction method

Modern method for extraction of starch from potato means using the hydrocyclone staged extraction method to concentrate, recover, and refine potato starch.The potato slurry is introduced to a series of hydrocyclones, which are normally configured with 18 stages. At the same time, the automatic operation of the equipment.These high-pressure devices use centrifugal force to separate the starch granules from the other components. As the slurry passes through the hydrocyclones, the starch particles are collected at the center while the remaining impurities are expelled through an outlet.To further purify the starch, the collected starch slurry undergoes multiple stages of washing, using fresh water to remove any remaining impurities, such as proteins and fibers. Under the 18 stages hydrocyclone extraction method, the first to third stages are used for starch concentration, the fourth to fifth stages are used for starch milk recovery, the sixth to seventh stages are for starch recovery, and the eighth to eighteenth stages are refining units.

Modern hydrocyclone staged extraction method

Modern hydrocyclone staged method for extraction of starch from potato allows for higher extraction rates, improved purity, and reduced labor costs compared to the traditional method.

In summary, the extraction of potato starch can be done through the traditional sedimentation method or the modern hydrocyclone-based method. While the former is more cost-effective, the modern hydrocyclone staged extraction method offers enhanced efficiency and starch purity, more suitable for the standard potato starch production. If you want to establish a factory and realize the standard production for potato starch, welcome to contact us. We will offer you the professional customized solution design!