文章信息

Identification of the coupled fouling mechanism involved in microfiltration of tobacco extracts liquid by multistage Hermia model, Journal of Food Process Engineering, 2022,45,2, e13961.

作者

Mengfeng Gao, Qiaole He, Huizhong Dong, Jiale Wang, Junfeng Shi, Chuanqi Xie, Yangming Martin Lo, Liming Zhao*

摘要

Microfiltration (MF) is a promising technique widely applied in the separation of solid–liquid mixtures. However, the potential application of MF was not explored much in the purification of tobacco extracts liquid. To be efficient, it necessitates having an assessment of the fouling mechanisms involved in MF processing. In this work, a thorough design of experiments was carried out to investigate various operating conditions, while specifying their effects on permeate flux were studied. Both single-stage and multistage Hermia models were used to elucidate the fouling mechanisms. The results of the single-stage Hermia model showed that cake layer formation was the dominant model, yet with fitting accuracy lower than 0.9; the type of fouling mechanism does relate to the operating conditions. Subsequently, the multistage Hermia model was used for determining the fouling mechanism during different time stages. It was found that the determinant coefficients R² were significantly increased and multiple fouling mechanisms could be coupled or occurred simultaneously. A ternary plot was established to visualize the contribution of each model and to bridge the relationship between the fouling mechanism and the operating conditions. Therefore, the proposed method is a valid, convenient tool when selecting optimal operating conditions with the lowest irreversible fouling. The flux recovery of fouled membranes exceeded 95% after successive cleaning with deionized water, a 1 wt% NaOH + 0.5 wt% SDS mixed solution, and a 0.5% (vol/vol) HNO₃ solution.

文章主页

https://onlinelibrary.wiley.com/doi/10.1111/jfpe.13961