There are many ways to extract starch from sweet potato. According to different kinds of sweet potato, it can be divided into two starch production processes: dry sweet potato and fresh sweet potato. Starch production from fresh sweet potatoes generally belongs to rural manual production, and sweet potato starch factories mostly use dry sweet potatoes as starch raw materials, so it belongs to industrial production. The following is how to make fresh sweet potatoes.

1. water washing: pour fresh potatoes into a jar, add clean water, turn them over manually, take them out after washing, and drain the remaining water.

2. Crushing: The drained fresh potato is crushed into pieces with a size of less than 2 cm, which is beneficial to crushing.

3, filtration: commonly known as big Luo. Pour mashed potatoes into a 60-mesh sieve and sieve. In the screening process, water is added for leaching, and acid pulp can also be used for leaching.

4. After the sweet potato starch is deposited in the bucket for a period of time, the water in the bucket is poured out, and the starch is taken out with a spatula and dried in the sun.

5. Sweet potato starch is ready.