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Industrial RO

RO plant for boiler feed water: pretreatment and polishing considerations

How reverse osmosis can fit into boiler makeup-water treatment and what upstream and downstream stages may be required.

RO plant for boiler feed water: pretreatment and polishing considerations
In this guide

This article explains the treatment objective, the design information that matters and the operating checks that help keep the system practical after installation.

Start from boiler requirements

Boiler pressure, cycles of concentration, condensate return and the manufacturer’s water-quality limits influence makeup treatment. RO can reduce dissolved salts, but it should be selected as part of the boiler-water program rather than as a generic add-on.

Control scaling before RO

Hardness, silica, iron and other feed constituents can limit RO recovery or cause fouling. Softening, filtration, chemical dosing or other pretreatment may be needed depending on the feed analysis.

Polishing may still be necessary

Some higher-pressure or sensitive systems require lower conductivity or silica than RO alone can provide. Ion exchange, EDI or other polishing can be considered when the actual boiler specification justifies it.

Need a treatment recommendation for your water?

Send the water source, intended use, approximate demand and any available test report. Waterwise Bangladesh can review the requirement and discuss an appropriate treatment approach.

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