Tea polyphenol is not only a new type of natural antioxidant, but also has obvious pharmacological functions, such as anti-aging, eliminating excess free radicals in the human body, removing fat and losing weight, reducing blood sugar, blood lipid and cholesterol, preventing cardiovascular diseases and inhibiting tumor cells etc. Tea polyphenols have important applications in food processing, medicine, daily chemicals and other fields. Therefore, the extraction and application of tea polyphenols has received extensive attention at home and abroad. Today, the editor of Shandong Bona Group will introduce the extraction of tea polyphenols by membrane separation technology.
The ultrafiltration membrane can effectively clarify the tea polyphenol extract, the solid impurity removal rate is high, and most of the macromolecular substances such as pectin, soluble protein and polysaccharide are retained, and most of the tea polyphenols are permeated.In order to reduce the retention rate of tea polyphenols by the ultrafiltration membrane, during the operation, on the basis of ensuring the impurity removal effect, the surface flow rate of the membrane can be appropriately increased. On the basis of ensuring the permeation rate of tea polyphenols, an ultrafiltration membrane with a smaller molecular weight cut-off can also be considered to clarify the tea polyphenol extract, thereby improving the purity of tea polyphenols in the later stage. The pre-impurity removal effect of microfiltration membrane used in tea polyphenol extract is not obvious, which will cause the loss of some functional components. Microfiltration membranes with smaller pore size can be studied to remove impurities to facilitate the later membrane concentration treatment. Or use a filter screen larger than 300 meshes to achieve preliminary impurity removal, and the effect is also more obvious.
The advantages of membrane separation technology to extract tea polyphenols:
1. Membrane separation and concentration technology combined with low-temperature extraction and separation technology can avoid the oxidative loss of active ingredients and improve the yield;
2. Plate and frame or centrifugal filtration replaces traditional heavy metal precipitation, the product is safe and reliable, and the production cycle is short;
3. Membrane separation and separation technology can prolong the service life of resin and reduce the amount of eluent used, and improve the adsorption efficiency;
4. The low-temperature membrane concentration technology has a high retention rate for components such as tea polyphenols, and the concentrated permeate water is clear and translucent, which can be recycled and used to reduce the cost of water consumption;
5. High degree of automation, using PLC plus inverter control, simple and convenient operation;
6. Membrane separation and filtration technology intercepts macromolecular proteins, polysaccharides, colloids and other impurities that are invisible to the naked eye in the tea soup at the molecular level, and realizes the purification and purification of the tea soup. Long equipment life.
It is feasible to use membrane separation technology to remove impurities, separate and concentrate the tea polyphenol extract. However, in order to obtain tea polyphenol products or even instant tea powder, it is impossible to use only a single separation membrane. Combining a suitable membrane process route and other separation and purification techniques to improve the purity and yield of tea polyphenol products, and further combining spraying, freeze-drying and other means to obtain instant tea powder to make tea beverages has long been a current research focus. Improving the quality of tea polyphenols and the taste of tea beverages will become the direction of future research in the industry. With the wide application of membrane separation technology in the industrialization process, it plays an increasingly important role in the extraction process of functional components of tea.
Shandong Bona Group focuses on solving problems such as concentration and filtration in the production process of beverages / plant extraction / traditional Chinese medicine preparations / fermentation broth / vinegar and soy sauce, etc., and provides customers with an overall separation and purification solution. If you have separation and purification needs, welcome feel free to contact with us, We are looking forward to cooperating with you!
Post time: Apr-20-2022