Silica is present in almost all surface waters and reacts with oxygen to silicon dioxide (SiO2). It needs to be removed from process water to protect industrial equipment.
Silica can be present either in dissolved form (reactive silica) or in particulate form (colloidal silica). Ion exchange will not remove colloidal silica. RO will foul with colloidal silica. Therefor removal of colloidal silica is critical in high purity applications.
Pentair developed a Silica Removal Package based on hollow-fiber tight ultrafiltration. The Silica Removal Package applies the X-Flow HFS60 module with a molecular weight cut-off (MWCO) of 10.000 Dalton. These membranes do not suffer from carbonate scaling and can be chemically cleaned at high pH-values. A combination of this technology with a downstream RO or ion exchange system creates a high-performance silica removal system.
If you have any questions, please contact us.
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