Rejection of trace organic pollutants with high pressure membranes (NF/RO)

✍ Scribed by Verliefde, A.R.D. ;Heijman, S.G.J. ;Cornelissen, E.R. ;Amy, G.L. ;Van der Bruggen, B. ;van Dijk, J.C.

• Publisher: American Institute of Chemical Engineers
• Year: 2008
• Tongue: English
• Weight: 266 KB
• Volume: 27
• Category: Article
• ISSN: 0278-4491
• DOI: 10.1002/ep.10272

✦ Synopsis

Abstract

This article presents a modeling approach for the rejection of trace organic pollutants in high‐pressure membranes. The rejection values of uncharged organic solutes with a wide range of solute size and hydrophobicity are determined. Sigmoidal rejection curves are constructed and modeled for solutes of different hydrophobicity. The model is based on a log‐normal pore size distribution model. A model is also presented to model the rejection of charged organic solutes, based on the rejection of uncharged solutes and the concept of a “charge concentration polarization.” Moreover, scale‐up issues arising when translating results from bench‐scale units to full‐scale plants are addressed, by assessing the viability of a full‐scale rejection model. The full‐scale model is based on a convection‐diffusion model for the transport of organic solutes through the high‐pressure membranes and the use of mass balances in the system. © 2008 American Institute of Chemical Engineers Environ Prog, 2008