Fouling mechanism study of tannins simulated solution membrane process based on Hermia model / 中草药

ABSTRACT

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.