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Dealkalisers utilise weak cation resin to change the bicarbonates (alkalinity) in the water to carbonic acid. To remove the carbonic acid, the water is passed through a degasser tower. When exhausted, the resin is regenerated by acid.

The total dissolved solids (TDS) content of the water is reduced by an amount equivalent to the alkalinity present in the raw water and therefore a partially demineralised water is produced. This is very useful as the capital and operating cost of the treatment are very low.

Typical applications are for pretreatment of boiler feed water where lowering of the feed water TDS enables the boiler blowdown to be reduced. Also, dealkalisation by ion exchange is finding widespread acceptance and use in the soft drinks and brewing industry. Both of these industries require low alkalinity water for certain products and dealkalisation by ion exchange is a clean, easily automated, low cost process with many advantages over the more traditional cold lime treatment or direct acid injection methods.

AWE have two ranges of dealkalisers similar to the range of base exchange softeners. The small 'packaged plant' range utilises special vinyl ester pressure vessels and all plastic multiport valves. The large industrial range features specially lined mild steel pressure vessels, individually lined valves and pipework and microprocessor control. Automatic regeneration is normally initiated by a pH controller.

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For further information or to request a copy of our company literature by post or electronically, please contact us using either of the following methods:


AWE (Anderson Water Equipment) Limited,
Cardiff Bay Business Centre,
Lewis Road,
Ocean Park,
CF24 5EL

Tel: +44 (0)29 2049 2848
Fax: +44 (0)872 111 5552
Web: www.aweltd.co.uk

Sales Enquiries: sales@aweltd.co.uk
General Enquiries: water@aweltd.co.uk

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