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Industrial fermentation broth contains complex mixed components including microbial cell debris, residual proteins, colloidal polymers, suspended solids and metabolic impurities after fermentation completion. Traditional clarification methods such as plate-frame filtration, vacuum filtration and centrifugal separation can only remove large particulate impurities, while tiny soluble proteins and biological colloids remain in the liquid, causing turbidity, poor stability and low product purity. In addition, traditional high-temperature concentration easily damages heat-sensitive bioactive substances and leads to low product yield. Cross-flow ultrafiltration membrane technology realizes low-temperature physical purification and precise impurity removal. It intercepts macromolecular invalid impurities and retains target active metabolites, effectively improving liquid clarity, product purity and batch stability. As an efficient and environmentally friendly refining method, ultrafiltration
Freshly squeezed fruit juice contains a variety of unstable substances such as pectin, soluble protein, fine pulp fibers and colloidal impurities after crushing and juicing. These micro impurities are the main causes of juice turbidity, post-precipitation, layering and poor shelf stability. Traditional clarification methods including diatomaceous earth filtration, plate-and-frame filtration and centrifugal separation can only remove large suspended particles, but fail to completely eliminate macromolecular colloids. High-temperature sterilization and thermal concentration will destroy natural flavor, vitamins and antioxidant nutrients, seriously restricting the production of high-quality pure fruit juice and concentrated juice products. Cross-flow ultrafiltration membrane technology adopts low-temperature physical screening to realize high-precision clarification of fruit juice. It effectively intercepts invalid macromolecular impurities while retaining small-molecule flavor substances
Traditional Chinese medicine extraction liquid contains complex impurities such as plant pectin, macromolecular protein, tannin, residual starch and inorganic salts after water and alcohol extraction. Traditional purification methods including alcohol precipitation, resin adsorption and vacuum concentration have the disadvantages of high reagent consumption, long process cycle, serious active ingredient loss and high energy consumption, which cannot meet the production standards of high-purity and high-stability herbal finished products. Cross-flow nanofiltration membrane technology realizes physical impurity removal, desalination, decolorization and low-temperature concentration through precise molecular screening. It effectively removes invalid macromolecular impurities and small-molecule heterologous substances while fully retaining heat-sensitive active ingredients. This green and efficient separation process has become the core refining technology for modern Chinese medicine deep-
