Experimental simulation of continuous nanofiltration processes using a pilot plant in batch mode

Autores UPV
Año
CONGRESO Experimental simulation of continuous nanofiltration processes using a pilot plant in batch mode

Abstract

This work shows a method to simulate the performance of continuous nanofiltration processes using experimental data obtained with a tank equipped with a single module working in batch mode. The method describes the appropriate changes in feed concentration and operating conditions to be performed in a batch system in order to obtain similar conditions to those of the continuous one. The exactitude of the analogy between both systems is also discussed. The use of this approach can be especially useful in nanofiltration. Present nanofiltration models are not accurate to describe the permselective behaviour at high concentration and parameters obtained in some conditions may not be applicable in others. Therefore, empirical information obtained in conditions as similar as possible to those that will be obtained in the continuous system will improved the accuracy of its design. As an application example, the performance of a process intended to remove nitrate from water was studied. For the batch experiments, a high rejection nanofiltration membrane was used (NF90 Dow-Filmtec). Besides obtaining an estimation of the concentration profiles along the continuous system, it was also possible to estimate the error obtained. In conclusion, the experimental methodology shown is useful to design optimal configuration in nanofiltration applications where models do not accurately provide the rejection of specific ions.