Fouling of ion-exchange membranes during electrodialytic acid whey processing analysed by 2D fluorescence and FTIR spectroscopy

Emilie N. Nielsen,Ulysse Cordin,Mathias Gøtke,Svetlozar Velizarov,Claudia F. Galinha,Leif H. Skibsted,João G. Crespo,Lilia M. Ahrné

Separation and Purification Technology（2023）

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摘要

•Fouling extension and type differ for anion-exchange and cation-exchange membranes.•Operating at over limiting current density tends to reduce fouling.•2D fluorescence showed most changes on surfaces of anion-exchange facing the diluate.•FTIR showed changes in AEM surfaces due to lactose and lactic acid in the concentrate.•Cleaning strategies were proposed based on 2D fluorescence and FTIR results obtained.

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关键词

electrodialytic acid whey processing,ion-exchange

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