RESUMEN
Objective: To analyse the fouling mechanism of tannins simulated solution membrane process. Methods: Taken the simulated solution consisting of tannins and small molecularly effective substances (berberine and geniposide) as an object of this study, the flux, the removal rate of the macromolecular substances, the size distribution of the different simulated solutions, and the was investigate by Hermia model in this study. Results: For tannins simulated solution and tannins + berberine + gardenoside simulated solution, fouling occured within only one phase controlled by cake formation. Due to the presence of the cake layer, the permeation rate of berberine and geniposide was not ideal in the simulated solution (67.63% and 87.55%, respectively). Conclusion: The Hermia mathematical model could be used as an important method to study the mechanism of the membrane fouling of Chinese herbal extracts. The formation and presence of the filter cake layer may be one of the reasons for the serious pollution of the traditional Chinese medicines’ membrane process.
RESUMEN
Objective: To provide fundamental information regarding the complex phenomena of membrane fouling caused by the pectin in traditional Chinese medicine extracts and investigate the accuracy and viability of the Hermia model in the determination of fouling mechanisms. Methods: The pectin and simulated solutions of pectin and small molecular pharmacodynamic substances (berberine) in Chinese herbal extracts were used as the object of study. The Hermia model was used to study the fouling mechanism according to the flux changes in the membrane process. Results: The pectin simulated solutions were researched by mathematical model and scanning electronic microscopy (SEM). The result showed that the formation of the cake layer was the main cause of flux decrease and membrane fouling. Conclusion: Hermia model can be used as a method to study the membrane fouling mechanism of traditional Chinese medicine extracts, which can provide basic information for the complex phenomenon of membrane fouling caused by ultrafiltration of Chinese herbal medicine aqueous extracts.