Purified Water for Pharma: Why RO and EDI Replaced Ion Exchange

At a glance. Pharma plants once used ion exchange beds that needed acid and caustic regeneration. A Tech Inc. Purified Water Generation Skid uses reverse osmosis and electrodeionisation instead, giving steady quality with no regeneration chemicals.

The treatment train

1. Multimedia and carbon filters remove solids and chlorine.

2. Softening or antiscalant protects the RO.

3. One or two RO passes remove most ions, organics and microbes.

4. EDI polishes conductivity continuously.

What to specify

• Output and peak demand.

• Feed-water analysis.

• Hot-water sanitisation, if required.

• Instruments: conductivity, TOC, temperature, flow.

Frequently asked questions

Single or double pass? Double pass for difficult feeds and extra margin.

Can it feed a WFI still? Yes; purified water is the feed for stills and pure steam.

Send your feed analysis to mail@techincresearch.com for a proposal.