Zeneca's biotechnology facility at Alderley Park required
a supply of Water For Injection (WFI) and a pharmaceutical
still was specified. The quality of the 1000 litre per hour
make up water for the still was required to be better than
2 µS/cm and was required continuously 24 hours per day.
Process feasibility studies, detailed process design, equipment
specification, procurement, project management and commissioning
The treatment scheme comprises two 100% duty deionisation trains
each consisting of a standard strong cation-strong anion deioniser
followed by a strong cation polishing unit to produce water of,
typically, 0.1 µS/cm conductivity. The treated water is
continuously recirculated to maintain chemical and bacteriological
quality and spent regenerant is neutralised prior to sewer discharge.