1. Roughing method: The representative methods of roughing method include suspension method and airflow classification method.
2. Chemical separation method: Chemical separation method refers to the method of extracting and preparing dietary fiber with chemical reagents after drying and crushing crude products or raw materials.
3. Enzymatic reagent method: Enzymatic reagent method mainly uses a variety of biological enzyme preparations to treat raw materials to obtain dietary fiber.
4. Membrane separation method: Membrane separation method is to extract dietary fibers with different molecular weights by using high-tech membrane separation technology.