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Industrial production, pharmaceutical manufacturing, food processing and laboratory testing require stable high-purity process water. Traditional water purification methods including sand filtration, activated carbon and softening treatment can only remove partial suspended solids and impurities, but fail to filter dissolved salts, tiny colloids and microbial contaminants. Reverse osmosis membrane technology uses high-precision pressure-driven physical separation to remove more than 99% of inorganic salts, bacteria, viruses and organic impurities. It stably produces high-standard industrial pure water. With low operating cost and mature modular design, RO membrane has become the core technology for modern industrial pure water and deionized water preparation.
Crude herbal extract often presents dark color caused by macromolecular pigments, tannin polymers and humus‑like substances. Conventional decolorization relies heavily on activated carbon adsorption, which leads to effective ingredient loss, disposable carbon waste and complicated post‑treatment. Nanofiltration membrane realizes physical decolorization by molecular weight cut‑off difference. It intercepts most high‑molecular‑weight pigments while retaining majority of target active components. This article discusses the mechanism of nanofiltration decolorization, compares with activated carbon process, analyzes influencing factors such as temperature, pH and transmembrane pressure, and states application value for herbal and plant extract factories.
Traditional fruit wine clarification commonly adopts bentonite adsorption and diatomite filtration. These conventional methods will cause loss of aroma substances, introduce exogenous additives and generate plenty of filter waste. Cross‑flow membrane filtration becomes a promising physical clarification solution for fruit wine production. Without adding flocculants, the cross‑flow membrane system removes suspended pulp residues, colloids and microbial particles under moderate operating pressure. It stabilizes fruit wine quality and shortens the aging cycle. This article describes working principle of cross‑flow membrane, compares it with traditional clarification processes, analyzes key operating parameters and summarizes practical benefits for fruit wine manufacturers.
