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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-
Protein hydrolysis and enzymatic digestion processes produce crude polypeptide liquid containing macromolecular impurities, undigested protein, suspended solids and colloidal residues. Traditional purification methods such as alcohol precipitation and vacuum concentration cause serious active peptide loss, low product purity and high energy consumption, failing to meet the production requirements of high-purity functional polypeptide raw materials. Cross-flow ultrafiltration membrane technology realizes precise molecular grading and low-temperature concentration through physical screening. It effectively intercepts invalid macromolecular impurities while retaining small-molecule active polypeptides, improving product purity and solution clarity. This low-temperature, green and efficient membrane process has become the preferred refining solution for modern biological protein deep-processing enterprises.
Plant crude extracts contain a large number of insoluble residues, fiber debris, colloidal pectin and denatured macromolecular impurities after crushing and leaching. Traditional static sedimentation and bag filtration fail to remove micro colloids thoroughly, resulting in turbid feed liquid, severe membrane fouling and low finished product purity in subsequent refining processes. The sanitary disc stack centrifuge adopts high-speed density-difference separation to achieve continuous, low-temperature and closed clarification of plant extract liquid. It efficiently removes solid residues and unstable colloidal substances without damaging natural active ingredients such as flavonoids and polyphenols. This equipment greatly improves liquid clarity, stabilizes post-process membrane separation effect, and increases the final yield of plant active substances, becoming the ideal pretreatment equipment for modern botanical deep-processing lines.
