Euromembrane 2000 highlights membrane-based water treatment technologies (original) (raw)

2001, Membrane Technology

The first instalment of our Euromembrane 2000 round-up, which was published i At Euromembrane 2000, Marianne Nystrom in the January 2001 issue of Membrane Technology, looked at developments in i of the Department of Chemical Technology, liquid membranes and ~stillation. The conference aIso looked in detail at water. Lappeenranta University of Technology in treatment, and this article, the second in a series of three summaries covering the j Finland, highlighted some of the potential uses of NE and the advantages which this technology event that was held in Israel during September last year, considers the role which i oEers_ These are different types of membranes are now playing in this area. . Compared with RO, the concentration of a product which cannot pass through a NF membrane costs less because of the Lower pressures which are needed. Examples of this include applications in the pulp and paper industry. NF can be used as a pretreatment method in the production of drinking water. Because part of the salt is retained and parr is permeated, the pressures can be kept lower, and the fluxes higher, than is possible with RO. It also preferentially retains multivalent ions (hardness). If needed, the final step can then use RO, which eliminates the remaining monovalent salts.

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