The Medical Research Council required 1000 litres per hour
of sterile, ultra high purity water (18M W .cm) for use in their
new biotechnology research facility at Addenbrookes Hospital,
System design, detailed process design, equipment specification
and project management.
The system comprises duty and standby base exchange softeners, reverse
osmosis, storage and polishing. The polishing plant consists of a
standard strong cation - strong anion deioniser with a cation polishing
unit producing water of 17M W .cm quality followed by a non regenerable
mixed bed unit and 0.1µm membrane filters to remove bacteriological
contaminants. The polished water is delivered into a ring main for
distribution around the laboratory with unused water returning to
the storage tank.