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Interception of nanofiltration membrane molecular weight between ultrafiltration and reverse osmosis membranes, for 200 ~ 1000 da, nanofiltration membrane have intercept live larger molecular weight material at the same time, also can make the smaller molecular weight substances (such as salt) through the dual function. Its separation process without any chemical reaction, no heat, no phase change, will not affect the separation of substances of biological activity, flavor and aroma, etc., and has the characteristics of energy saving, simple technology.

Nanofiltration separation becomes more and more widely used in electronics, food and pharmaceutical industries, such as the preparation, highly concentrated juice, peptides and amino acids separation, enrichment and purification of antibiotics, whey protein concentrate, nanofiltration membrane biochemical reactor - coupling in practical separation process, etc. Compared with ultrafiltration and reverse osmosis, nanofiltration process of monovalent ions and the molecular weight of less than 200 intercept is poorer, organic matter for bivalent or multivalent ions and the molecular weight between 200 ~ 500 have a higher removal rate of organic matter, based on the characteristics of nanofiltration process is mainly used in water softening and purification as well as the relative molecular mass at the level of material separation, classification, and concentrated, such as dyes, antibiotics, peptides, polysaccharide and other chemical and biological engineering product classification and concentration), decoloring and peculiar smell, etc. Mainly used for removing hardness ingredients such as Ca and Mg ions in drinking water, trihalomethanes intermediates, bad breath, chromaticity, pesticide, synthetic detergent, soluble organic matter, and the evaporation residue.

The main Features of the Features:

Resistant to high temperature, thermal induced phase separation process preparation, high strength, resistant to wash;

, compared with the reverse osmosis, under the condition of high salinity and low pressure with large flux

Active ingredients, can be used through the intercept impurities, also can through the salt or other impurities intercept effective ingredients

Application domain Application Area:

Polysaccharide, peptide, amino acids and antibiotics desalination enrichment;

Anthocyanins plants such as alcohol solution and alcohol concentration;

Tea powder, tea polyphenols, stevia sugar concentration;

Enrichment of plant extracts and purification liquid resin parsing desalination enrichment;

The dye desalination, wastewater treatment