With the development of membrane technology, membrane technology has been widely used in the separation, purification and concentration of industrial liquids.
The integrated membrane process can be used to separate and extract the small molecular substances in the solution more quickly and simply, especially in the separation, purification and concentration of small molecular substances in complex systems. Compared with the traditional process, it has the advantages of faster, milder, lower energy consumption and easier operation. For example, there are mature cases in the separation and extraction of small and medium molecular substances in complex systems such as fermentation broth system, plant extract system, natural small molecule functional substances, and even some of them have become general processes in existing production and are widely accepted