Hollow Fiber Membrane Filtration & Spiral Membrane Concentration for Pu'er Tea Extract Production

Pu'er tea is a famous fermented tea widely used in functional drinks, health supplements and instant tea powder. To produce high-quality Pu'er tea extract, manufacturers need gentle processing to retain tea polyphenols, theabrownin and natural tea aroma. Hollow fiber membrane and spiral wound membrane technology provides an effective solution for tea liquid clarification and concentration.

In the traditional process, hot extracted Pu'er tea broth contains fine tea particles, proteins and colloids. These impurities will cause turbidity and precipitation in finished tea extract. The conventional method uses plate-and-frame filtration or diatomaceous earth, which brings filter residue waste and easy loss of aromatic substances.

The hollow fiber ultrafiltration system is used first for clarification. As a physical separation method, it intercepts tea dregs, macromolecular proteins and colloids without high temperature or filter aids. The permeate tea liquid becomes clear and bright, preserving the unique mellow flavour and active components of Pu'er tea.

After clarification, spiral wound membrane is adopted for low-temperature concentration. It removes excess water under mild temperature, greatly reducing the workload of subsequent thermal evaporation. Compared with high-temperature concentration, the spiral membrane process protects heat-sensitive tea aroma and bioactive compounds, cuts energy consumption and improves the yield of Pu'er tea extract.

This combined membrane workflow delivers stable product quality and cleaner production. It is ideal for factories producing instant Pu'er tea powder and liquid tea extracts.