We often see that cut apples and potatoes quickly turn black and become yellow-brown, which is caused by the phenolic substances in them.
These substances are also present in potatoes. In the broken starch slurry, phenolic substances mix with proteins, pectin, fats and others, causing the starch slurry to turn yellow and making it difficult to filter and extract, resulting in grayish dry potato starch of impure quality.
In addition to containing starch, tubers also contain small amounts of proteins, fibers, fats, vitamins and phenolic substances.
When the crushed slurry is filtered, a large amount of coarse fibers are taken away by the potato residue, and some gravel and stones are filtered out, but some fine molecular particles cannot be separated and removed by the filtering equipment, such as proteins, fats, pectin, phenolic substances, pigments, dust and other impurities mixed together with the starch slurry to form oil powder.
1. Sedimentation tank technology: This is a more commonly used purification and separation method in traditional starch processing. The specific method is to store the starch slurry in a square cement pool or a large container, and let it settle for more than 12 hours.
Fatty substances, phenolic substances, dust and other low-density materials gradually float up and form obvious stratification with the starch slurry at the bottom of the tank. Then, the turbid waste water that separates from the upper layer is discharged, leaving a relatively clean starch block.
The disadvantages of this method are long processing time, poor separation effect, water waste, and indiscriminate discharge of pollutants that harm the water environment.
2. Cyclone station technology: This is a refined separation equipment specially used to separate oil powder, fruit powder, and pectin.
By using centrifugal force and the difference in density between different substances, various substances are quickly separated to achieve the purpose of removing oil powder and fruit powder.
It is efficient and time-saving, completing 12 hours of work in just one minute, making it more suitable for users of cassava starch processing.
Currently, most of our management personnel are technical and marketing experts, including more than 100 mechanical engineers who are specialized in mechanical equipment, with many years of experience in mechanical equipment manufacturing and R&D. Goodway has obtained 35 national patents in the field of cassava and potato processing machinery. Meanwhile, we have been cooperating with many high-tech partners and research institutes, as well as many professional universities.
To provide high-quality products and services, Goodway adopts advanced mechanical production lines and internal management systems, aiming to achieve international standards as its development goal. We have passed the ISO9001:2015 quality system certification, ensuring that all products delivered are 100% qualified, and materials and finished products are strictly inspected according to standards. Welcome to inquire.