To meet demand for
bacteria-free, deionised water
at its Biggleswade HQ, paint
manufacturer Pro-Spray
Automotive Finishes has
adopted ELGA Process
Water’s proposal for an onsite
demineralisation plant
that produces water when
needed.

ELGA suggested that Pro-
Spray produce the required
deionised water on demand
using reverse osmosis and
ion exchange technologies
and expained that this would
be more cost effective than
buying IBCs in bulk and
would guarantee consistency.

Mains water is delivered
into a break tank and then
pumped to a MiniRO reverse
osmosis plant that removes
95% of dissolved solids and
99% of organic contaminants
and bacteria. Permeate from
the MiniRO is collected in a
tank and pumped through a
UV disinfection unit, a
cartridge filter and a service
deionisation cylinder to give
deionised water of better
than 0.5µS/cm conductivity.

This is delivered to the
manufacturing line via a ring
main. Integrated meters give
continuous verification for
QC and audit purposes.

The solution is said to save
about 25p/L of water
compared with the cost of
buying IBCs.