Basic Technological Process of Sweet Potato Starch Processing

The extraction of sweet potato starch mainly consists of the following core stages: raw material cleaning, crushing and grinding, pulp-residue separation, starch extraction, cleaning and purification, and final drying. Professional matching equipment is required for each stage to jointly guarantee the yield and quality of starch.

 

For the cleaning stage, drum washers or bubble washers are commonly adopted. Surface soil and impurities on sweet potatoes are removed through water flushing and friction. In the crushing stage, hammer crushers or rasp mills break sweet potatoes into fine particles to fully rupture cell walls, creating favorable conditions for starch release.

 

Pulp-residue separation is the key process determining starch extraction rate. Combined centrifugal screens and hydrocyclones can efficiently separate starch milk from fibrous residues. Multi-stage cyclone separation technology is widely applied in modern processing equipment. Under centrifugal force generated at different pressures, impurities are removed step by step to obtain high-purity starch milk.