Polysaccharide is also called polysaccharides, is passed by aldehyde or ketone sugar sugar dehydration glycosidic bond formation, and by glycosidic bond can be connected with the linear or branched chain polymer, abundant in nature. Polysaccharide in maintaining the body's life activities play an important biological activities, such as anti-tumor, anti-virus, antioxidant, anticoagulant, and participate in immune regulation, have fall blood sugar, reducing blood fat, resist radiation, the development direction of potential. Polysaccharide extraction, isolation, purification and analysis is the basis of plant polysaccharide.

Evaporation concentration or other technology on the traditional process, biological activity material loss is more, high energy consumption of the system, the production cost is high, the labor intensity. Remain the state of normal temperature and the new technology of membrane, no phase change, the effective components of polysaccharide without any adverse effects, not only won't destroy the polysaccharide bioactivity, and can significantly reduce the system energy consumption and the intensity of labor.

Liquid membrane separation system can not only get more sugar bacteria, impurity removal filter, reduce the pressure of the subsequent section, at the same time for subsequent section to create a good operating condition; More polysaccharide can be realized and the separation of small molecules at room temperature; Polysaccharide with water and small molecules between the separation and enrichment, resulting in a certain concentration of polysaccharide concentrate.