In order to study the concentration efficiency of electrodialysis with multi-ion system solution

the mathematical model of the concentration of electrodialysis was established based on mass balance and electrochemical basic equations by simplifying the mass transfer process of electrodialysis. Moreover

comprehensively considering the influences of the operating conditions

such as the circulation flow

current density and mass concentration of influent dissolved solid matter(TDS) as well as the selective permeability of the ion exchange membrane

water transfer and other secondary processes

the model equation of the water transfer and the ion transfer in the mass transfer process of electrodialysis was derived

and the mathematical model equation for predicting the content of TDS of concentrated liquid was established and completed. Furthermore

electrodialysis concentration experiment was completed in laboratory with softened desulfurization wastewater

the experimental results and the predicted values of the mathematical model were statistically analyzed. The result indicates that the correlation is significant

and the reliability of the prediction value of the model equation is verified.