Pretreat feed water well.
RO systems shall excel.
RO membrane is susceptible to contamination.
Like a successful performance, it comes with diligent preparation. RO membrane is vulnerable to fouling – caused by scale, silt, bacteria, organic compounds or by a combination of these. Learn more →
Various pretreatment options are available. Subject to the content of the feed water, they are either used singularly or in combination. Any pretreatment process selected shall reduce a few most critical contaminants to the desired levels for RO membrane to achieve optimal recovery, and with a reasonable life cycle of 3-5 years in operations.
Turbidity. SDI. And others.
Don’t leave them untreated.
Fouling by excessive micro-organism, organic matter and silt (content of colloidal particulates), and scaling by cumulative deposit of soluble salts, such as calcium sulphate, barium sulphate, calcium carbonate, silica etc, are the most common problems of many RO applications. In the assessment and selection of pretreatment options for RO systems, some critical feed water’s parameters and their limits may be useful guides, though other undesired content shall not be neglected too. While chlorine is often used to eliminate/ minimise harmful bacteria and viruses upstream, and prevent biofouling, residual chlorine is not acceptable to thin-film RO membrane. The oxidation effect of chlorine will cause rapid degradation of membrane. Learn more >
(1) Total cumulative chlorine tolerance is up to 1000 ppm-hours (ppm x hours of exposure to chlorine).