Article ID Journal Published Year Pages File Type
624406 Desalination 2011 6 Pages PDF
Abstract

This study focused on the application of laboratory scale cross-flow flat sheet reverse osmosis (RO) method for boron, salt and silica removal from geothermal water. Most important operating parameters of RO process such as membrane type, operating pressure and feed flow rate (thus the cross-flow velocity) that govern permeate flux, boron, silica and salt removals were investigated. Four different RO membranes, AD-SWRO (GE Osmonics), AG-BWRO (GE Osmonics), BW-30-BWRO (FILMTEC) and AK-BWRO (GE Osmonics) were used to compare their performances. In order to examine the effects of pressure and cross-flow velocity, system was operated at pressures ranging from 15 to 30 bar and cross-flow velocities of 0.16 and 0.33 m/s. Obtained permeate boron concentrations were evaluated according to drinking and irrigation water standards.

Research highlights► Boron rejection and permeate flux depend on membrane type and operating pressure. ► Pressure increase affected both permeate quality and quality positively. ► Salt and silica were rejected effectively from geothermal water by all membranes. ► SWRO (AD) membrane provided higher boron rejections. ► Increase in flow rate did not affect permeate flux, salt, boron and silica rejections significantly.

Related Topics
Physical Sciences and Engineering Chemical Engineering Filtration and Separation
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