Process Brief:
Synthetic biology small-molecule compounds (molecular weight 200–500 D) possess various functions, such as antioxidant activity, increased blood oxygen, and anti-fatigue effects (e.g., Rhodiola rosea); significant moisturizing effects (e.g., ectoine); and antioxidant and whitening properties (e.g., ergothioneine). These compounds are typically derived from E. coli fermentation broth, and the extraction process includes ceramic membrane clarification filtration, decolorization, deproteinization, desalting, concentration, and crystallization. Among these steps, the decolorization process is critical for removing pigments produced by the fermentation medium and bacterial cells, requiring high decolorization efficiency, low product rejection, and high filtration flux.

Technical Advantages:
The process employs organic spiral-wound membrane crossflow filtration technology to achieve efficient decolorization at low temperatures. Through a one-step decolorization and ultra-low pressure filtration approach, it delivers high flux and stable decolorization performance with consistent results. The membrane exhibits superior performance with low rejection of neutral small-molecule functional compounds, ensuring high product yield. Combined with the filtration process, product loss is virtually eliminated.